diff --git a/configure b/configure
index 3080e8d3d..636b73cf0 100755
--- a/configure
+++ b/configure
@@ -1,9 +1,9 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.72.
+# Generated by GNU Autoconf 2.71.
 #
 #
-# Copyright (C) 1992-1996, 1998-2017, 2020-2023 Free Software Foundation,
+# Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
 # Inc.
 #
 #
@@ -15,6 +15,7 @@
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
+as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
@@ -23,13 +24,12 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else case e in #(
-  e) case `(set -o) 2>/dev/null` in #(
+else $as_nop
+  case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
-esac ;;
 esac
 fi
 
@@ -101,7 +101,7 @@ IFS=$as_save_IFS
 
      ;;
 esac
-# We did not find ourselves, most probably we were run as 'sh COMMAND'
+# We did not find ourselves, most probably we were run as `sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
@@ -131,14 +131,15 @@ case $- in # ((((
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed 'exec'.
+# out after a failed `exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
   fi
   # We don't want this to propagate to other subprocesses.
           { _as_can_reexec=; unset _as_can_reexec;}
 if test "x$CONFIG_SHELL" = x; then
-  as_bourne_compatible="if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+  as_bourne_compatible="as_nop=:
+if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
   NULLCMD=:
@@ -146,13 +147,12 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '\${1+\"\$@\"}'='\"\$@\"'
   setopt NO_GLOB_SUBST
-else case e in #(
-  e) case \`(set -o) 2>/dev/null\` in #(
+else \$as_nop
+  case \`(set -o) 2>/dev/null\` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
-esac ;;
 esac
 fi
 "
@@ -170,9 +170,8 @@ as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
 if ( set x; as_fn_ret_success y && test x = \"\$1\" )
 then :
 
-else case e in #(
-  e) exitcode=1; echo positional parameters were not saved. ;;
-esac
+else \$as_nop
+  exitcode=1; echo positional parameters were not saved.
 fi
 test x\$exitcode = x0 || exit 1
 blah=\$(echo \$(echo blah))
@@ -185,15 +184,14 @@ test -x / || exit 1"
   if (eval "$as_required") 2>/dev/null
 then :
   as_have_required=yes
-else case e in #(
-  e) as_have_required=no ;;
-esac
+else $as_nop
+  as_have_required=no
 fi
   if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null
 then :
 
-else case e in #(
-  e) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+else $as_nop
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_found=false
 for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
 do
@@ -226,13 +224,12 @@ IFS=$as_save_IFS
 if $as_found
 then :
 
-else case e in #(
-  e) if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+else $as_nop
+  if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
 	      as_run=a "$SHELL" -c "$as_bourne_compatible""$as_required" 2>/dev/null
 then :
   CONFIG_SHELL=$SHELL as_have_required=yes
-fi ;;
-esac
+fi
 fi
 
 
@@ -254,7 +251,7 @@ case $- in # ((((
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed 'exec'.
+# out after a failed `exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
 fi
@@ -273,8 +270,7 @@ $0: message. Then install a modern shell, or manually run
 $0: the script under such a shell if you do have one."
   fi
   exit 1
-fi ;;
-esac
+fi
 fi
 fi
 SHELL=${CONFIG_SHELL-/bin/sh}
@@ -313,6 +309,14 @@ as_fn_exit ()
   as_fn_set_status $1
   exit $1
 } # as_fn_exit
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
 
 # as_fn_mkdir_p
 # -------------
@@ -381,12 +385,11 @@ then :
   {
     eval $1+=\$2
   }'
-else case e in #(
-  e) as_fn_append ()
+else $as_nop
+  as_fn_append ()
   {
     eval $1=\$$1\$2
-  } ;;
-esac
+  }
 fi # as_fn_append
 
 # as_fn_arith ARG...
@@ -400,14 +403,21 @@ then :
   {
     as_val=$(( $* ))
   }'
-else case e in #(
-  e) as_fn_arith ()
+else $as_nop
+  as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
-  } ;;
-esac
+  }
 fi # as_fn_arith
 
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
 
 # as_fn_error STATUS ERROR [LINENO LOG_FD]
 # ----------------------------------------
@@ -481,8 +491,6 @@ as_cr_alnum=$as_cr_Letters$as_cr_digits
     /[$]LINENO/=
   ' <$as_myself |
     sed '
-      t clear
-      :clear
       s/[$]LINENO.*/&-/
       t lineno
       b
@@ -531,6 +539,7 @@ esac
 as_echo='printf %s\n'
 as_echo_n='printf %s'
 
+
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
@@ -542,9 +551,9 @@ if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
-    # 1) On MSYS, both 'ln -s file dir' and 'ln file dir' fail.
-    # 2) DJGPP < 2.04 has no symlinks; 'ln -s' creates a wrapper executable.
-    # In both cases, we have to default to 'cp -pR'.
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
@@ -569,12 +578,10 @@ as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
-as_sed_cpp="y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
-as_tr_cpp="eval sed '$as_sed_cpp'" # deprecated
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
 
 # Sed expression to map a string onto a valid variable name.
-as_sed_sh="y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
-as_tr_sh="eval sed '$as_sed_sh'" # deprecated
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
 
 
 test -n "$DJDIR" || exec 7<&0 </dev/null
@@ -935,7 +942,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: '$ac_useropt'"
+      as_fn_error $? "invalid feature name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -961,7 +968,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: '$ac_useropt'"
+      as_fn_error $? "invalid feature name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1174,7 +1181,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: '$ac_useropt'"
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1190,7 +1197,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: '$ac_useropt'"
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1220,8 +1227,8 @@ do
   | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
     x_libraries=$ac_optarg ;;
 
-  -*) as_fn_error $? "unrecognized option: '$ac_option'
-Try '$0 --help' for more information"
+  -*) as_fn_error $? "unrecognized option: \`$ac_option'
+Try \`$0 --help' for more information"
     ;;
 
   *=*)
@@ -1229,7 +1236,7 @@ Try '$0 --help' for more information"
     # Reject names that are not valid shell variable names.
     case $ac_envvar in #(
       '' | [0-9]* | *[!_$as_cr_alnum]* )
-      as_fn_error $? "invalid variable name: '$ac_envvar'" ;;
+      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
     esac
     eval $ac_envvar=\$ac_optarg
     export $ac_envvar ;;
@@ -1279,7 +1286,7 @@ do
   as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
 done
 
-# There might be people who depend on the old broken behavior: '$host'
+# There might be people who depend on the old broken behavior: `$host'
 # used to hold the argument of --host etc.
 # FIXME: To remove some day.
 build=$build_alias
@@ -1347,7 +1354,7 @@ if test ! -r "$srcdir/$ac_unique_file"; then
   test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
   as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
 fi
-ac_msg="sources are in $srcdir, but 'cd $srcdir' does not work"
+ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
 ac_abs_confdir=`(
 	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
 	pwd)`
@@ -1375,7 +1382,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures this package to adapt to many kinds of systems.
+\`configure' configures this package to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1389,11 +1396,11 @@ Configuration:
       --help=short        display options specific to this package
       --help=recursive    display the short help of all the included packages
   -V, --version           display version information and exit
-  -q, --quiet, --silent   do not print 'checking ...' messages
+  -q, --quiet, --silent   do not print \`checking ...' messages
       --cache-file=FILE   cache test results in FILE [disabled]
-  -C, --config-cache      alias for '--cache-file=config.cache'
+  -C, --config-cache      alias for \`--cache-file=config.cache'
   -n, --no-create         do not create output files
-      --srcdir=DIR        find the sources in DIR [configure dir or '..']
+      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
 
 Installation directories:
   --prefix=PREFIX         install architecture-independent files in PREFIX
@@ -1401,10 +1408,10 @@ Installation directories:
   --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                           [PREFIX]
 
-By default, 'make install' will install all the files in
-'$ac_default_prefix/bin', '$ac_default_prefix/lib' etc.  You can specify
-an installation prefix other than '$ac_default_prefix' using '--prefix',
-for instance '--prefix=\$HOME'.
+By default, \`make install' will install all the files in
+\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than \`$ac_default_prefix' using \`--prefix',
+for instance \`--prefix=\$HOME'.
 
 For better control, use the options below.
 
@@ -1548,7 +1555,7 @@ Some influential environment variables:
   CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
 
-Use these variables to override the choices made by 'configure' or to help
+Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
 Report bugs to the package provider.
@@ -1616,9 +1623,9 @@ test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
 configure
-generated by GNU Autoconf 2.72
+generated by GNU Autoconf 2.71
 
-Copyright (C) 2023 Free Software Foundation, Inc.
+Copyright (C) 2021 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 _ACEOF
@@ -1657,12 +1664,11 @@ printf "%s\n" "$ac_try_echo"; } >&5
        } && test -s conftest.$ac_objext
 then :
   ac_retval=0
-else case e in #(
-  e) printf "%s\n" "$as_me: failed program was:" >&5
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_retval=1 ;;
-esac
+	ac_retval=1
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
@@ -1681,8 +1687,8 @@ printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 #include <$2>
@@ -1690,12 +1696,10 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   eval "$3=yes"
-else case e in #(
-  e) eval "$3=no" ;;
-esac
+else $as_nop
+  eval "$3=no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
-esac
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
@@ -1735,12 +1739,11 @@ printf "%s\n" "$ac_try_echo"; } >&5
        }
 then :
   ac_retval=0
-else case e in #(
-  e) printf "%s\n" "$as_me: failed program was:" >&5
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_retval=1 ;;
-esac
+	ac_retval=1
 fi
   # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
   # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
@@ -1776,7 +1779,7 @@ This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
 It was created by $as_me, which was
-generated by GNU Autoconf 2.72.  Invocation command line was
+generated by GNU Autoconf 2.71.  Invocation command line was
 
   $ $0$ac_configure_args_raw
 
@@ -2022,10 +2025,10 @@ esac
 printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
     . "$ac_site_file" \
-      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "failed to load site script $ac_site_file
-See 'config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5; }
   fi
 done
 
@@ -2061,7 +2064,9 @@ struct stat;
 /* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
 struct buf { int x; };
 struct buf * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (char **p, int i)
+static char *e (p, i)
+     char **p;
+     int i;
 {
   return p[i];
 }
@@ -2075,21 +2080,6 @@ static char *f (char * (*g) (char **, int), char **p, ...)
   return s;
 }
 
-/* C89 style stringification. */
-#define noexpand_stringify(a) #a
-const char *stringified = noexpand_stringify(arbitrary+token=sequence);
-
-/* C89 style token pasting.  Exercises some of the corner cases that
-   e.g. old MSVC gets wrong, but not very hard. */
-#define noexpand_concat(a,b) a##b
-#define expand_concat(a,b) noexpand_concat(a,b)
-extern int vA;
-extern int vbee;
-#define aye A
-#define bee B
-int *pvA = &expand_concat(v,aye);
-int *pvbee = &noexpand_concat(v,bee);
-
 /* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
    function prototypes and stuff, but not \xHH hex character constants.
    These do not provoke an error unfortunately, instead are silently treated
@@ -2117,19 +2107,16 @@ ok |= (argc == 0 || f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]);
 
 # Test code for whether the C compiler supports C99 (global declarations)
 ac_c_conftest_c99_globals='
-/* Does the compiler advertise C99 conformance? */
+// Does the compiler advertise C99 conformance?
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
 # error "Compiler does not advertise C99 conformance"
 #endif
 
-// See if C++-style comments work.
-
 #include <stdbool.h>
 extern int puts (const char *);
 extern int printf (const char *, ...);
 extern int dprintf (int, const char *, ...);
 extern void *malloc (size_t);
-extern void free (void *);
 
 // Check varargs macros.  These examples are taken from C99 6.10.3.5.
 // dprintf is used instead of fprintf to avoid needing to declare
@@ -2179,6 +2166,7 @@ typedef const char *ccp;
 static inline int
 test_restrict (ccp restrict text)
 {
+  // See if C++-style comments work.
   // Iterate through items via the restricted pointer.
   // Also check for declarations in for loops.
   for (unsigned int i = 0; *(text+i) != '\''\0'\''; ++i)
@@ -2244,8 +2232,6 @@ ac_c_conftest_c99_main='
   ia->datasize = 10;
   for (int i = 0; i < ia->datasize; ++i)
     ia->data[i] = i * 1.234;
-  // Work around memory leak warnings.
-  free (ia);
 
   // Check named initializers.
   struct named_init ni = {
@@ -2267,7 +2253,7 @@ ac_c_conftest_c99_main='
 
 # Test code for whether the C compiler supports C11 (global declarations)
 ac_c_conftest_c11_globals='
-/* Does the compiler advertise C11 conformance? */
+// Does the compiler advertise C11 conformance?
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
 # error "Compiler does not advertise C11 conformance"
 #endif
@@ -2390,12 +2376,12 @@ for ac_var in $ac_precious_vars; do
   eval ac_new_val=\$ac_env_${ac_var}_value
   case $ac_old_set,$ac_new_set in
     set,)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&5
-printf "%s\n" "$as_me: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,set)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was not set in the previous run" >&5
-printf "%s\n" "$as_me: error: '$ac_var' was not set in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,);;
     *)
@@ -2404,18 +2390,18 @@ printf "%s\n" "$as_me: error: '$ac_var' was not set in the previous run" >&2;}
 	ac_old_val_w=`echo x $ac_old_val`
 	ac_new_val_w=`echo x $ac_new_val`
 	if test "$ac_old_val_w" != "$ac_new_val_w"; then
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' has changed since the previous run:" >&5
-printf "%s\n" "$as_me: error: '$ac_var' has changed since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
 	  ac_cache_corrupted=:
 	else
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&5
-printf "%s\n" "$as_me: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+printf "%s\n" "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
 	  eval $ac_var=\$ac_old_val
 	fi
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  '$ac_old_val'" >&5
-printf "%s\n" "$as_me:   former value:  '$ac_old_val'" >&2;}
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: '$ac_new_val'" >&5
-printf "%s\n" "$as_me:   current value: '$ac_new_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
+printf "%s\n" "$as_me:   former value:  \`$ac_old_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
+printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
       fi;;
   esac
   # Pass precious variables to config.status.
@@ -2431,11 +2417,11 @@ printf "%s\n" "$as_me:   current value: '$ac_new_val'" >&2;}
   fi
 done
 if $ac_cache_corrupted; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
 printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
-  as_fn_error $? "run '${MAKE-make} distclean' and/or 'rm $cache_file'
+  as_fn_error $? "run \`${MAKE-make} distclean' and/or \`rm $cache_file'
 	    and start over" "$LINENO" 5
 fi
 ## -------------------- ##
@@ -2473,8 +2459,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$CC"; then
+else $as_nop
+  if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2496,8 +2482,7 @@ done
   done
 IFS=$as_save_IFS
 
-fi ;;
-esac
+fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2519,8 +2504,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$ac_ct_CC"; then
+else $as_nop
+  if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2542,8 +2527,7 @@ done
   done
 IFS=$as_save_IFS
 
-fi ;;
-esac
+fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -2578,8 +2562,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$CC"; then
+else $as_nop
+  if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2601,8 +2585,7 @@ done
   done
 IFS=$as_save_IFS
 
-fi ;;
-esac
+fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2624,8 +2607,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$CC"; then
+else $as_nop
+  if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
   ac_prog_rejected=no
@@ -2664,8 +2647,7 @@ if test $ac_prog_rejected = yes; then
     ac_cv_prog_CC="$as_dir$ac_word${1+' '}$@"
   fi
 fi
-fi ;;
-esac
+fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2689,8 +2671,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$CC"; then
+else $as_nop
+  if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2712,8 +2694,7 @@ done
   done
 IFS=$as_save_IFS
 
-fi ;;
-esac
+fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2739,8 +2720,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$ac_ct_CC"; then
+else $as_nop
+  if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2762,8 +2743,7 @@ done
   done
 IFS=$as_save_IFS
 
-fi ;;
-esac
+fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -2801,8 +2781,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$CC"; then
+else $as_nop
+  if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2824,8 +2804,7 @@ done
   done
 IFS=$as_save_IFS
 
-fi ;;
-esac
+fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2847,8 +2826,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) if test -n "$ac_ct_CC"; then
+else $as_nop
+  if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2870,8 +2849,7 @@ done
   done
 IFS=$as_save_IFS
 
-fi ;;
-esac
+fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -2900,10 +2878,10 @@ fi
 fi
 
 
-test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
-See 'config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5; }
 
 # Provide some information about the compiler.
 printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
@@ -2975,8 +2953,8 @@ printf "%s\n" "$ac_try_echo"; } >&5
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
-  # Autoconf-2.13 could set the ac_cv_exeext variable to 'no'.
-# So ignore a value of 'no', otherwise this would lead to 'EXEEXT = no'
+  # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
+# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
 # in a Makefile.  We should not override ac_cv_exeext if it was cached,
 # so that the user can short-circuit this test for compilers unknown to
 # Autoconf.
@@ -2996,7 +2974,7 @@ do
 	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
 	fi
 	# We set ac_cv_exeext here because the later test for it is not
-	# safe: cross compilers may not add the suffix if given an '-o'
+	# safe: cross compilers may not add the suffix if given an `-o'
 	# argument, so we may need to know it at that point already.
 	# Even if this section looks crufty: it has the advantage of
 	# actually working.
@@ -3007,9 +2985,8 @@ do
 done
 test "$ac_cv_exeext" = no && ac_cv_exeext=
 
-else case e in #(
-  e) ac_file='' ;;
-esac
+else $as_nop
+  ac_file=''
 fi
 if test -z "$ac_file"
 then :
@@ -3018,14 +2995,13 @@ printf "%s\n" "no" >&6; }
 printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "C compiler cannot create executables
-See 'config.log' for more details" "$LINENO" 5; }
-else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; } ;;
-esac
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
 printf %s "checking for C compiler default output file name... " >&6; }
@@ -3049,10 +3025,10 @@ printf "%s\n" "$ac_try_echo"; } >&5
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
-  # If both 'conftest.exe' and 'conftest' are 'present' (well, observable)
-# catch 'conftest.exe'.  For instance with Cygwin, 'ls conftest' will
-# work properly (i.e., refer to 'conftest.exe'), while it won't with
-# 'rm'.
+  # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
 for ac_file in conftest.exe conftest conftest.*; do
   test -f "$ac_file" || continue
   case $ac_file in
@@ -3062,12 +3038,11 @@ for ac_file in conftest.exe conftest conftest.*; do
     * ) break;;
   esac
 done
-else case e in #(
-  e) { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+else $as_nop
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of executables: cannot compile and link
-See 'config.log' for more details" "$LINENO" 5; } ;;
-esac
+See \`config.log' for more details" "$LINENO" 5; }
 fi
 rm -f conftest conftest$ac_cv_exeext
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
@@ -3083,8 +3058,6 @@ int
 main (void)
 {
 FILE *f = fopen ("conftest.out", "w");
- if (!f)
-  return 1;
  return ferror (f) || fclose (f) != 0;
 
   ;
@@ -3124,27 +3097,26 @@ printf "%s\n" "$ac_try_echo"; } >&5
     if test "$cross_compiling" = maybe; then
 	cross_compiling=yes
     else
-	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot run C compiled programs.
-If you meant to cross compile, use '--host'.
-See 'config.log' for more details" "$LINENO" 5; }
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5; }
     fi
   fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
 printf "%s\n" "$cross_compiling" >&6; }
 
-rm -f conftest.$ac_ext conftest$ac_cv_exeext \
-  conftest.o conftest.obj conftest.out
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
 ac_clean_files=$ac_clean_files_save
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 printf %s "checking for suffix of object files... " >&6; }
 if test ${ac_cv_objext+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -3176,18 +3148,16 @@ then :
        break;;
   esac
 done
-else case e in #(
-  e) printf "%s\n" "$as_me: failed program was:" >&5
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of object files: cannot compile
-See 'config.log' for more details" "$LINENO" 5; } ;;
-esac
+See \`config.log' for more details" "$LINENO" 5; }
 fi
-rm -f conftest.$ac_cv_objext conftest.$ac_ext ;;
-esac
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
 printf "%s\n" "$ac_cv_objext" >&6; }
@@ -3198,8 +3168,8 @@ printf %s "checking whether the compiler supports GNU C... " >&6; }
 if test ${ac_cv_c_compiler_gnu+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -3216,14 +3186,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_compiler_gnu=yes
-else case e in #(
-  e) ac_compiler_gnu=no ;;
-esac
+else $as_nop
+  ac_compiler_gnu=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 ac_cv_c_compiler_gnu=$ac_compiler_gnu
- ;;
-esac
+
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
 printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
@@ -3241,8 +3209,8 @@ printf %s "checking whether $CC accepts -g... " >&6; }
 if test ${ac_cv_prog_cc_g+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) ac_save_c_werror_flag=$ac_c_werror_flag
+else $as_nop
+  ac_save_c_werror_flag=$ac_c_werror_flag
    ac_c_werror_flag=yes
    ac_cv_prog_cc_g=no
    CFLAGS="-g"
@@ -3260,8 +3228,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
-else case e in #(
-  e) CFLAGS=""
+else $as_nop
+  CFLAGS=""
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -3276,8 +3244,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
-else case e in #(
-  e) ac_c_werror_flag=$ac_save_c_werror_flag
+else $as_nop
+  ac_c_werror_flag=$ac_save_c_werror_flag
 	 CFLAGS="-g"
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3294,15 +3262,12 @@ if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
-esac
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
-esac
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-   ac_c_werror_flag=$ac_save_c_werror_flag ;;
-esac
+   ac_c_werror_flag=$ac_save_c_werror_flag
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
 printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
@@ -3329,8 +3294,8 @@ printf %s "checking for $CC option to enable C11 features... " >&6; }
 if test ${ac_cv_prog_cc_c11+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) ac_cv_prog_cc_c11=no
+else $as_nop
+  ac_cv_prog_cc_c11=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3347,28 +3312,25 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c11" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC ;;
-esac
+CC=$ac_save_CC
 fi
 
 if test "x$ac_cv_prog_cc_c11" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else case e in #(
-  e) if test "x$ac_cv_prog_cc_c11" = x
+else $as_nop
+  if test "x$ac_cv_prog_cc_c11" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
 printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
-     CC="$CC $ac_cv_prog_cc_c11" ;;
-esac
+     CC="$CC $ac_cv_prog_cc_c11"
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
-  ac_prog_cc_stdc=c11 ;;
-esac
+  ac_prog_cc_stdc=c11
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
@@ -3378,8 +3340,8 @@ printf %s "checking for $CC option to enable C99 features... " >&6; }
 if test ${ac_cv_prog_cc_c99+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) ac_cv_prog_cc_c99=no
+else $as_nop
+  ac_cv_prog_cc_c99=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3396,28 +3358,25 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c99" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC ;;
-esac
+CC=$ac_save_CC
 fi
 
 if test "x$ac_cv_prog_cc_c99" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else case e in #(
-  e) if test "x$ac_cv_prog_cc_c99" = x
+else $as_nop
+  if test "x$ac_cv_prog_cc_c99" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
 printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
-     CC="$CC $ac_cv_prog_cc_c99" ;;
-esac
+     CC="$CC $ac_cv_prog_cc_c99"
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
-  ac_prog_cc_stdc=c99 ;;
-esac
+  ac_prog_cc_stdc=c99
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
@@ -3427,8 +3386,8 @@ printf %s "checking for $CC option to enable C89 features... " >&6; }
 if test ${ac_cv_prog_cc_c89+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) ac_cv_prog_cc_c89=no
+else $as_nop
+  ac_cv_prog_cc_c89=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3445,28 +3404,25 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c89" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC ;;
-esac
+CC=$ac_save_CC
 fi
 
 if test "x$ac_cv_prog_cc_c89" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else case e in #(
-  e) if test "x$ac_cv_prog_cc_c89" = x
+else $as_nop
+  if test "x$ac_cv_prog_cc_c89" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else case e in #(
-  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
 printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
-     CC="$CC $ac_cv_prog_cc_c89" ;;
-esac
+     CC="$CC $ac_cv_prog_cc_c89"
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
-  ac_prog_cc_stdc=c89 ;;
-esac
+  ac_prog_cc_stdc=c89
 fi
 fi
 
@@ -3528,14 +3484,13 @@ then :
 printf "%s\n" "DUPLICATE_PATHS=$with_duplicatePaths" >&6; }
     printf "%s\n" "#define DUPLICATE_PATHS \"$with_duplicatePaths\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: DUPLICATE_PATHS=$withval" >&5
 printf "%s\n" "DUPLICATE_PATHS=$withval" >&6; }
     DUPLICATE_PATHS="$withval"
     printf "%s\n" "#define DUPLICATE_PATHS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3550,14 +3505,13 @@ then :
 printf "%s\n" "LMOD_ALLOW_ROOT_USE=$with_allowRootUse" >&6; }
     printf "%s\n" "#define LMOD_ALLOW_ROOT_USE \"$with_allowRootUse\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: LMOD_ALLOW_ROOT_USE=$withval" >&5
 printf "%s\n" "LMOD_ALLOW_ROOT_USE=$withval" >&6; }
     LMOD_ALLOW_ROOT_USE="$withval"
     printf "%s\n" "#define LMOD_ALLOW_ROOT_USE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3570,14 +3524,13 @@ then :
 printf "%s\n" "SITE_MSG_FILE=$with_siteMsgFile" >&6; }
     printf "%s\n" "#define SITE_MSG_FILE \"$with_siteMsgFile\"" >>confdefs.h
 
-else case e in #(
-  e) withval="<empty>"
+else $as_nop
+  withval="<empty>"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SITE_MSG_FILE=$withval" >&5
 printf "%s\n" "SITE_MSG_FILE=$withval" >&6; }
     SITE_MSG_FILE="$withval"
     printf "%s\n" "#define SITE_MSG_FILE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3590,14 +3543,13 @@ then :
 printf "%s\n" "LMOD_OVERRIDE_LANG=$with_lang" >&6; }
     printf "%s\n" "#define LMOD_OVERRIDE_LANG \"$with_lang\"" >>confdefs.h
 
-else case e in #(
-  e) withval="<empty>"
+else $as_nop
+  withval="<empty>"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: LMOD_OVERRIDE_LANG=$withval" >&5
 printf "%s\n" "LMOD_OVERRIDE_LANG=$withval" >&6; }
     LMOD_OVERRIDE_LANG="$withval"
     printf "%s\n" "#define LMOD_OVERRIDE_LANG \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3612,14 +3564,13 @@ then :
 printf "%s\n" "CASE_INDEPENDENT_SORTING=$with_caseIndependentSorting" >&6; }
     printf "%s\n" "#define CASE_INDEPENDENT_SORTING \"$with_caseIndependentSorting\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: CASE_INDEPENDENT_SORTING=$withval" >&5
 printf "%s\n" "CASE_INDEPENDENT_SORTING=$withval" >&6; }
     CASE_INDEPENDENT_SORTING="$withval"
     printf "%s\n" "#define CASE_INDEPENDENT_SORTING \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3634,14 +3585,13 @@ then :
 printf "%s\n" "COLORIZE=$with_colorize" >&6; }
     printf "%s\n" "#define COLORIZE \"$with_colorize\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: COLORIZE=$withval" >&5
 printf "%s\n" "COLORIZE=$withval" >&6; }
     COLORIZE="$withval"
     printf "%s\n" "#define COLORIZE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3656,14 +3606,13 @@ then :
 printf "%s\n" "DYNAMIC_SPIDER_CACHE=$with_dynamicSpiderCache" >&6; }
     printf "%s\n" "#define DYNAMIC_SPIDER_CACHE \"$with_dynamicSpiderCache\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: DYNAMIC_SPIDER_CACHE=$withval" >&5
 printf "%s\n" "DYNAMIC_SPIDER_CACHE=$withval" >&6; }
     DYNAMIC_SPIDER_CACHE="$withval"
     printf "%s\n" "#define DYNAMIC_SPIDER_CACHE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3678,14 +3627,13 @@ then :
 printf "%s\n" "HIDDEN_ITALIC=$with_hiddenItalic" >&6; }
     printf "%s\n" "#define HIDDEN_ITALIC \"$with_hiddenItalic\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: HIDDEN_ITALIC=$withval" >&5
 printf "%s\n" "HIDDEN_ITALIC=$withval" >&6; }
     HIDDEN_ITALIC="$withval"
     printf "%s\n" "#define HIDDEN_ITALIC \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3700,14 +3648,13 @@ then :
 printf "%s\n" "EXACT_MATCH=$with_exactMatch" >&6; }
     printf "%s\n" "#define EXACT_MATCH \"$with_exactMatch\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: EXACT_MATCH=$withval" >&5
 printf "%s\n" "EXACT_MATCH=$withval" >&6; }
     EXACT_MATCH="$withval"
     printf "%s\n" "#define EXACT_MATCH \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3721,14 +3668,13 @@ then :
 printf "%s\n" "MODE=$with_mode" >&6; }
     printf "%s\n" "#define MODE \"$with_mode\"" >>confdefs.h
 
-else case e in #(
-  e) withval="user_default"
+else $as_nop
+  withval="user_default"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: MODE=$withval" >&5
 printf "%s\n" "MODE=$withval" >&6; }
     MODE="$withval"
     printf "%s\n" "#define MODE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3741,14 +3687,13 @@ then :
 printf "%s\n" "LMOD_CONFIG_DIR=$with_lmodConfigDir" >&6; }
     printf "%s\n" "#define LMOD_CONFIG_DIR \"$with_lmodConfigDir\"" >>confdefs.h
 
-else case e in #(
-  e) withval="/etc/lmod"
+else $as_nop
+  withval="/etc/lmod"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: LMOD_CONFIG_DIR=$withval" >&5
 printf "%s\n" "LMOD_CONFIG_DIR=$withval" >&6; }
     LMOD_CONFIG_DIR="$withval"
     printf "%s\n" "#define LMOD_CONFIG_DIR \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3763,14 +3708,13 @@ then :
 printf "%s\n" "AUTO_SWAP=$with_autoSwap" >&6; }
     printf "%s\n" "#define AUTO_SWAP \"$with_autoSwap\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: AUTO_SWAP=$withval" >&5
 printf "%s\n" "AUTO_SWAP=$withval" >&6; }
     AUTO_SWAP="$withval"
     printf "%s\n" "#define AUTO_SWAP \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3787,14 +3731,13 @@ then :
 printf "%s\n" "EXPORT_MODULE=$with_exportedModuleCmd" >&6; }
     printf "%s\n" "#define EXPORT_MODULE \"$with_exportedModuleCmd\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: EXPORT_MODULE=$withval" >&5
 printf "%s\n" "EXPORT_MODULE=$withval" >&6; }
     EXPORT_MODULE="$withval"
     printf "%s\n" "#define EXPORT_MODULE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3809,14 +3752,13 @@ then :
 printf "%s\n" "REDIRECT=$with_redirect" >&6; }
     printf "%s\n" "#define REDIRECT \"$with_redirect\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: REDIRECT=$withval" >&5
 printf "%s\n" "REDIRECT=$withval" >&6; }
     REDIRECT="$withval"
     printf "%s\n" "#define REDIRECT \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3828,14 +3770,13 @@ then :
 printf "%s\n" "MODULEPATH_ROOT=$with_module_root_path" >&6; }
     printf "%s\n" "#define MODULEPATH_ROOT \"$with_module_root_path\"" >>confdefs.h
 
-else case e in #(
-  e) withval="$prefix/modulefiles"
+else $as_nop
+  withval="$prefix/modulefiles"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: MODULEPATH_ROOT=$withval" >&5
 printf "%s\n" "MODULEPATH_ROOT=$withval" >&6; }
     MODULEPATH_ROOT="$withval"
     printf "%s\n" "#define MODULEPATH_ROOT \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3848,14 +3789,13 @@ then :
 printf "%s\n" "ANCIENT=$with_ancient" >&6; }
     printf "%s\n" "#define ANCIENT \"$with_ancient\"" >>confdefs.h
 
-else case e in #(
-  e) withval="86400"
+else $as_nop
+  withval="86400"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ANCIENT=$withval" >&5
 printf "%s\n" "ANCIENT=$withval" >&6; }
     ANCIENT="$withval"
     printf "%s\n" "#define ANCIENT \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3868,14 +3808,13 @@ then :
 printf "%s\n" "SHORT_TIME=$with_shortTime" >&6; }
     printf "%s\n" "#define SHORT_TIME \"$with_shortTime\"" >>confdefs.h
 
-else case e in #(
-  e) withval="2"
+else $as_nop
+  withval="2"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SHORT_TIME=$withval" >&5
 printf "%s\n" "SHORT_TIME=$withval" >&6; }
     SHORT_TIME="$withval"
     printf "%s\n" "#define SHORT_TIME \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3888,14 +3827,13 @@ then :
 printf "%s\n" "SPIDER_CACHE_DIRS=$with_spiderCacheDir" >&6; }
     printf "%s\n" "#define SPIDER_CACHE_DIRS \"$with_spiderCacheDir\"" >>confdefs.h
 
-else case e in #(
-  e) withval=""
+else $as_nop
+  withval=""
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SPIDER_CACHE_DIRS=$withval" >&5
 printf "%s\n" "SPIDER_CACHE_DIRS=$withval" >&6; }
     SPIDER_CACHE_DIRS="$withval"
     printf "%s\n" "#define SPIDER_CACHE_DIRS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3908,14 +3846,13 @@ then :
 printf "%s\n" "SPIDER_CACHE_DESCRIPT_FN=$with_spiderCacheDescript" >&6; }
     printf "%s\n" "#define SPIDER_CACHE_DESCRIPT_FN \"$with_spiderCacheDescript\"" >>confdefs.h
 
-else case e in #(
-  e) withval=""
+else $as_nop
+  withval=""
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SPIDER_CACHE_DESCRIPT_FN=$withval" >&5
 printf "%s\n" "SPIDER_CACHE_DESCRIPT_FN=$withval" >&6; }
     SPIDER_CACHE_DESCRIPT_FN="$withval"
     printf "%s\n" "#define SPIDER_CACHE_DESCRIPT_FN \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3928,14 +3865,13 @@ then :
 printf "%s\n" "UPDATE_SYSTEM_FN=$with_updateSystemFn" >&6; }
     printf "%s\n" "#define UPDATE_SYSTEM_FN \"$with_updateSystemFn\"" >>confdefs.h
 
-else case e in #(
-  e) withval=""
+else $as_nop
+  withval=""
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: UPDATE_SYSTEM_FN=$withval" >&5
 printf "%s\n" "UPDATE_SYSTEM_FN=$withval" >&6; }
     UPDATE_SYSTEM_FN="$withval"
     printf "%s\n" "#define UPDATE_SYSTEM_FN \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3948,14 +3884,13 @@ then :
 printf "%s\n" "PREPEND_BLOCK=$with_prependBlock" >&6; }
     printf "%s\n" "#define PREPEND_BLOCK \"$with_prependBlock\"" >>confdefs.h
 
-else case e in #(
-  e) withval="normal"
+else $as_nop
+  withval="normal"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: PREPEND_BLOCK=$withval" >&5
 printf "%s\n" "PREPEND_BLOCK=$withval" >&6; }
     PREPEND_BLOCK="$withval"
     printf "%s\n" "#define PREPEND_BLOCK \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3968,14 +3903,13 @@ then :
 printf "%s\n" "SITE_NAME=$with_siteName" >&6; }
     printf "%s\n" "#define SITE_NAME \"$with_siteName\"" >>confdefs.h
 
-else case e in #(
-  e) withval='<empty>'
+else $as_nop
+  withval='<empty>'
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SITE_NAME=$withval" >&5
 printf "%s\n" "SITE_NAME=$withval" >&6; }
     SITE_NAME="$withval"
     printf "%s\n" "#define SITE_NAME \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -3988,14 +3922,13 @@ then :
 printf "%s\n" "SYSHOST=$with_syshost" >&6; }
     printf "%s\n" "#define SYSHOST \"$with_syshost\"" >>confdefs.h
 
-else case e in #(
-  e) withval='<empty>'
+else $as_nop
+  withval='<empty>'
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SYSHOST=$withval" >&5
 printf "%s\n" "SYSHOST=$withval" >&6; }
     SYSHOST="$withval"
     printf "%s\n" "#define SYSHOST \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4010,14 +3943,13 @@ then :
 printf "%s\n" "ALLOW_TCL_MFILES==$withval" >&6; }
     printf "%s\n" "#define ALLOW_TCL_MFILES \"$withval\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ALLOW_TCL_MFILES=$withval" >&5
 printf "%s\n" "ALLOW_TCL_MFILES=$withval" >&6; }
     ALLOW_TCL_MFILES="$withval"
     printf "%s\n" "#define ALLOW_TCL_MFILES \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4032,14 +3964,13 @@ then :
 printf "%s\n" "DISABLE_NAME_AUTOSWAP==$withval" >&6; }
     printf "%s\n" "#define DISABLE_NAME_AUTOSWAP \"$withval\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: DISABLE_NAME_AUTOSWAP=$withval" >&5
 printf "%s\n" "DISABLE_NAME_AUTOSWAP=$withval" >&6; }
     DISABLE_NAME_AUTOSWAP="$withval"
     printf "%s\n" "#define DISABLE_NAME_AUTOSWAP \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4054,14 +3985,13 @@ then :
 printf "%s\n" "MPATH_AVAIL==$withval" >&6; }
     printf "%s\n" "#define MPATH_AVAIL \"$withval\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: MPATH_AVAIL=$withval" >&5
 printf "%s\n" "MPATH_AVAIL=$withval" >&6; }
     MPATH_AVAIL="$withval"
     printf "%s\n" "#define MPATH_AVAIL \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4076,14 +4006,13 @@ then :
 printf "%s\n" "SETTARG=$with_settarg" >&6; }
     printf "%s\n" "#define SETTARG \"$with_settarg\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SETTARG=$withval" >&5
 printf "%s\n" "SETTARG=$withval" >&6; }
     SETTARG="$withval"
     printf "%s\n" "#define SETTARG \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 DFLT_IGNORE_DIRS=".svn,.git,.hg,.bzr"
@@ -4098,14 +4027,13 @@ then :
 printf "%s\n" "IGNORE_DIRS=$with_ignoreDirs" >&6; }
     printf "%s\n" "#define IGNORE_DIRS \"$with_ignoreDirs\"" >>confdefs.h
 
-else case e in #(
-  e) withval="$DFLT_IGNORE_DIRS"
+else $as_nop
+  withval="$DFLT_IGNORE_DIRS"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: IGNORE_DIRS=$withval" >&5
 printf "%s\n" "IGNORE_DIRS=$withval" >&6; }
     IGNORE_DIRS="$withval"
     printf "%s\n" "#define IGNORE_DIRS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4120,14 +4048,13 @@ then :
 printf "%s\n" "PIN_VERSIONS=$with_pinVersions" >&6; }
     printf "%s\n" "#define PIN_VERSIONS \"$with_pinVersions\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: PIN_VERSIONS=$withval" >&5
 printf "%s\n" "PIN_VERSIONS=$withval" >&6; }
     PIN_VERSIONS="$withval"
     printf "%s\n" "#define PIN_VERSIONS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4142,14 +4069,13 @@ then :
 printf "%s\n" "LMOD_DOWNSTREAM_CONFLICTS=$with_downstreamConflicts" >&6; }
     printf "%s\n" "#define LMOD_DOWNSTREAM_CONFLICTS \"$with_downstreamConflicts\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: LMOD_DOWNSTREAM_CONFLICTS=$withval" >&5
 printf "%s\n" "LMOD_DOWNSTREAM_CONFLICTS=$withval" >&6; }
     LMOD_DOWNSTREAM_CONFLICTS="$withval"
     printf "%s\n" "#define LMOD_DOWNSTREAM_CONFLICTS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4164,14 +4090,13 @@ then :
 printf "%s\n" "MODULES_AUTO_HANDLING=$with_modulesAutoHandling" >&6; }
     printf "%s\n" "#define MODULES_AUTO_HANDLING \"$with_modulesAutoHandling\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: MODULES_AUTO_HANDLING=$withval" >&5
 printf "%s\n" "MODULES_AUTO_HANDLING=$withval" >&6; }
     MODULES_AUTO_HANDLING="$withval"
     printf "%s\n" "#define MODULES_AUTO_HANDLING \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4186,14 +4111,13 @@ then :
 printf "%s\n" "TMOD_PATH_RULE=$with_tmodPathRule" >&6; }
     printf "%s\n" "#define TMOD_PATH_RULE \"$with_tmodPathRule\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: TMOD_PATH_RULE=$withval" >&5
 printf "%s\n" "TMOD_PATH_RULE=$withval" >&6; }
     TMOD_PATH_RULE="$withval"
     printf "%s\n" "#define TMOD_PATH_RULE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4208,14 +4132,13 @@ then :
 printf "%s\n" "TMOD_FIND_FIRST=$with_tmodFindFirst" >&6; }
     printf "%s\n" "#define TMOD_FIND_FIRST \"$with_tmodFindFirst\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: TMOD_FIND_FIRST=$withval" >&5
 printf "%s\n" "TMOD_FIND_FIRST=$withval" >&6; }
     TMOD_FIND_FIRST="$withval"
     printf "%s\n" "#define TMOD_FIND_FIRST \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4228,14 +4151,13 @@ then :
 printf "%s\n" "LUA_INCLUDE=$with_lua_include" >&6; }
     printf "%s\n" "#define LUA_INCLUDE \"$with_lua_include\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: LUA_INCLUDE=$withval" >&5
 printf "%s\n" "LUA_INCLUDE=$withval" >&6; }
     LUA_INCLUDE="$withval"
     printf "%s\n" "#define LUA_INCLUDE \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4250,14 +4172,13 @@ then :
 printf "%s\n" "CACHED_LOADS=$with_cachedLoads" >&6; }
     printf "%s\n" "#define CACHED_LOADS \"$with_cachedLoads\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: CACHED_LOADS=$withval" >&5
 printf "%s\n" "CACHED_LOADS=$withval" >&6; }
     CACHED_LOADS="$withval"
     printf "%s\n" "#define CACHED_LOADS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4272,14 +4193,13 @@ then :
 printf "%s\n" "TERSE_DECORATIONS=$with_terseDecorations" >&6; }
     printf "%s\n" "#define TERSE_DECORATIONS \"$with_terseDecorations\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: TERSE_DECORATIONS=$withval" >&5
 printf "%s\n" "TERSE_DECORATIONS=$withval" >&6; }
     TERSE_DECORATIONS="$withval"
     printf "%s\n" "#define TERSE_DECORATIONS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4294,14 +4214,13 @@ then :
 printf "%s\n" "EXTENDED_DEFAULT=$with_extendedDefault" >&6; }
     printf "%s\n" "#define EXTENDED_DEFAULT \"$with_extendedDefault\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: EXTENDED_DEFAULT=$withval" >&5
 printf "%s\n" "EXTENDED_DEFAULT=$withval" >&6; }
     EXTENDED_DEFAULT="$withval"
     printf "%s\n" "#define EXTENDED_DEFAULT \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4316,14 +4235,13 @@ then :
 printf "%s\n" "SUPPORT_KSH=$with_supportKsh" >&6; }
     printf "%s\n" "#define SUPPORT_KSH \"$with_supportKsh\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SUPPORT_KSH=$withval" >&5
 printf "%s\n" "SUPPORT_KSH=$withval" >&6; }
     SUPPORT_KSH="$withval"
     printf "%s\n" "#define SUPPORT_KSH \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4336,14 +4254,13 @@ then :
 printf "%s\n" "MODULEPATH_INIT=$with_ModulePathInit" >&6; }
     printf "%s\n" "#define MODULEPATH_INIT \"$with_ModulePathInit\"" >>confdefs.h
 
-else case e in #(
-  e) withval="@PKG@/init/.modulespath"
+else $as_nop
+  withval="@PKG@/init/.modulespath"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: MODULEPATH_INIT=$withval" >&5
 printf "%s\n" "MODULEPATH_INIT=$withval" >&6; }
     MODULEPATH_INIT="$withval"
     printf "%s\n" "#define MODULEPATH_INIT \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4358,14 +4275,13 @@ then :
 printf "%s\n" "SITE_CONTROLLED_PREFIX=$with_siteControlPrefix" >&6; }
     printf "%s\n" "#define SITE_CONTROLLED_PREFIX \"$with_siteControlPrefix\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SITE_CONTROLLED_PREFIX=$withval" >&5
 printf "%s\n" "SITE_CONTROLLED_PREFIX=$withval" >&6; }
     SITE_CONTROLLED_PREFIX="$withval"
     printf "%s\n" "#define SITE_CONTROLLED_PREFIX \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4380,14 +4296,13 @@ then :
 printf "%s\n" "USE_BUILT_IN_PKGS=$with_useBuiltinPkgs" >&6; }
     printf "%s\n" "#define USE_BUILT_IN_PKGS \"$with_useBuiltinPkgs\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: USE_BUILT_IN_PKGS=$withval" >&5
 printf "%s\n" "USE_BUILT_IN_PKGS=$withval" >&6; }
     USE_BUILT_IN_PKGS="$withval"
     printf "%s\n" "#define USE_BUILT_IN_PKGS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4402,14 +4317,13 @@ then :
 printf "%s\n" "USE_DOT_CONFIG_DIR_ONLY=$with_useDotConfigDirOnly" >&6; }
     printf "%s\n" "#define USE_DOT_CONFIG_DIR_ONLY \"$with_useDotConfigDirOnly\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: USE_DOT_CONFIG_DIR_ONLY=$withval" >&5
 printf "%s\n" "USE_DOT_CONFIG_DIR_ONLY=$withval" >&6; }
     USE_DOT_CONFIG_DIR_ONLY="$withval"
     printf "%s\n" "#define USE_DOT_CONFIG_DIR_ONLY \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4424,14 +4338,13 @@ then :
 printf "%s\n" "SILENCE_SHELL_DEBUGGING=$with_silentShellDebugging" >&6; }
     printf "%s\n" "#define SILENCE_SHELL_DEBUGGING \"$with_silentShellDebugging\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: SILENCE_SHELL_DEBUGGING=$withval" >&5
 printf "%s\n" "SILENCE_SHELL_DEBUGGING=$withval" >&6; }
     SILENCE_SHELL_DEBUGGING="$withval"
     printf "%s\n" "#define SILENCE_SHELL_DEBUGGING \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4446,14 +4359,13 @@ then :
 printf "%s\n" "FAST_TCL_INTERP=$with_fastTCLInterp" >&6; }
     printf "%s\n" "#define FAST_TCL_INTERP \"$with_fastTCLInterp\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: FAST_TCL_INTERP=$withval" >&5
 printf "%s\n" "FAST_TCL_INTERP=$withval" >&6; }
     FAST_TCL_INTERP="$withval"
     printf "%s\n" "#define FAST_TCL_INTERP \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4466,14 +4378,13 @@ then :
 printf "%s\n" "NEARLY_FORBIDDEN_DAYS=$with_nearlyForbiddenDays" >&6; }
     printf "%s\n" "#define NEARLY_FORBIDDEN_DAYS \"$with_nearlyForbiddenDays\"" >>confdefs.h
 
-else case e in #(
-  e) withval="14"
+else $as_nop
+  withval="14"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: NEARLY_FORBIDDEN_DAYS=$withval" >&5
 printf "%s\n" "NEARLY_FORBIDDEN_DAYS=$withval" >&6; }
     NEARLY_FORBIDDEN_DAYS="$withval"
     printf "%s\n" "#define NEARLY_FORBIDDEN_DAYS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4488,14 +4399,13 @@ then :
 printf "%s\n" "MODULE_AUTO_HANDLING=$with-moduleAutoHandling" >&6; }
     printf "%s\n" "#define MODULE_AUTO_HANDLING \"$with-moduleAutoHandling\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: MODULE_AUTO_HANDLING=$withval" >&5
 printf "%s\n" "MODULE_AUTO_HANDLING=$withval" >&6; }
     MODULE_AUTO_HANDLING="$withval"
     printf "%s\n" "#define MODULE_AUTO_HANDLING \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4510,14 +4420,13 @@ then :
 printf "%s\n" "AVAIL_EXTENSIONS=$with_availExtensions" >&6; }
     printf "%s\n" "#define AVAIL_EXTENSIONS \"$with_availExtensions\"" >>confdefs.h
 
-else case e in #(
-  e) withval="yes"
+else $as_nop
+  withval="yes"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: AVAIL_EXTENSIONS=$withval" >&5
 printf "%s\n" "AVAIL_EXTENSIONS=$withval" >&6; }
     AVAIL_EXTENSIONS="$withval"
     printf "%s\n" "#define AVAIL_EXTENSIONS \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4535,14 +4444,13 @@ then :
 printf "%s\n" "PATH_TO_LUA=$with_lua" >&6; }
     printf "%s\n" "#define PATH_TO_LUA \"$with_lua\"" >>confdefs.h
 
-else case e in #(
-  e) withval="lua"
+else $as_nop
+  withval="lua"
     PATH_TO_LUA="$withval"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: PATH_TO_LUA=$withval" >&5
 printf "%s\n" "PATH_TO_LUA=$withval" >&6; }
     printf "%s\n" "#define PATH_TO_LUA \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4560,14 +4468,13 @@ then :
 printf "%s\n" "PATH_TO_LUAC=$with_luac" >&6; }
     printf "%s\n" "#define PATH_TO_LUAC \"$with_luac\"" >>confdefs.h
 
-else case e in #(
-  e) withval="luac"
+else $as_nop
+  withval="luac"
     PATH_TO_LUAC="$withval"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: PATH_TO_LUAC=$withval" >&5
 printf "%s\n" "PATH_TO_LUAC=$withval" >&6; }
     printf "%s\n" "#define PATH_TO_LUAC \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 
@@ -4582,14 +4489,13 @@ then :
 printf "%s\n" "LUA_SUFFIX=$with_luaSuffic" >&6; }
     printf "%s\n" "#define LUA_SUFFIX \"$with_luaSuffix\"" >>confdefs.h
 
-else case e in #(
-  e) withval="no"
+else $as_nop
+  withval="no"
     LUA_SUFFIX="$withval"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: LUA_SUFFIX=$withval" >&5
 printf "%s\n" "LUA_SUFFIX=$withval" >&6; }
     printf "%s\n" "#define LUA_SUFFIX \"$withval\"" >>confdefs.h
- ;;
-esac
+
 fi
 
 if test "$ALLOW_TCL_MFILES" = no ; then
@@ -4605,8 +4511,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_pkgConfig+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $pkgConfig in
+else $as_nop
+  case $pkgConfig in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_pkgConfig="$pkgConfig" # Let the user override the test with a path.
   ;;
@@ -4632,7 +4538,6 @@ IFS=$as_save_IFS
 
   test -z "$ac_cv_path_pkgConfig" && ac_cv_path_pkgConfig=""UNKNOWN_PKG_CONFIG""
   ;;
-esac ;;
 esac
 fi
 pkgConfig=$ac_cv_path_pkgConfig
@@ -4744,21 +4649,15 @@ printf %s "checking for library containing Tcl_CreateInterp... " >&6; }
 if test ${ac_cv_search_Tcl_CreateInterp+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) ac_func_search_save_LIBS=$LIBS
+else $as_nop
+  ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.
-   The 'extern "C"' is for builds by C++ compilers;
-   although this is not generally supported in C code supporting it here
-   has little cost and some practical benefit (sr 110532).  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char Tcl_CreateInterp (void);
+   builtin and then its argument prototype would still apply.  */
+char Tcl_CreateInterp ();
 int
 main (void)
 {
@@ -4789,13 +4688,11 @@ done
 if test ${ac_cv_search_Tcl_CreateInterp+y}
 then :
 
-else case e in #(
-  e) ac_cv_search_Tcl_CreateInterp=no ;;
-esac
+else $as_nop
+  ac_cv_search_Tcl_CreateInterp=no
 fi
 rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS ;;
-esac
+LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_Tcl_CreateInterp" >&5
 printf "%s\n" "$ac_cv_search_Tcl_CreateInterp" >&6; }
@@ -4804,9 +4701,8 @@ if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
-else case e in #(
-  e) rm -f makefile; as_fn_error $? "Unable to build Lmod with -ltcl Please install the tcl devel package or configure --with-fastTCLInterp=no to not require the tcl library" "$LINENO" 5 ;;
-esac
+else $as_nop
+  rm -f makefile; as_fn_error $? "Unable to build Lmod with -ltcl Please install the tcl devel package or configure --with-fastTCLInterp=no to not require the tcl library" "$LINENO" 5
 fi
 
 
@@ -4863,8 +4759,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PS+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PS in
+else $as_nop
+  case $PS in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PS="$PS" # Let the user override the test with a path.
   ;;
@@ -4890,7 +4786,6 @@ IFS=$as_save_IFS
 
   test -z "$ac_cv_path_PS" && ac_cv_path_PS="UNKNOWN_PS"
   ;;
-esac ;;
 esac
 fi
 PS=$ac_cv_path_PS
@@ -4918,8 +4813,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_READLINK+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $READLINK in
+else $as_nop
+  case $READLINK in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_READLINK="$READLINK" # Let the user override the test with a path.
   ;;
@@ -4945,7 +4840,6 @@ IFS=$as_save_IFS
 
   test -z "$ac_cv_path_READLINK" && ac_cv_path_READLINK="UNKNOWN_READLINK"
   ;;
-esac ;;
 esac
 fi
 READLINK=$ac_cv_path_READLINK
@@ -4975,8 +4869,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_EXPR+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $EXPR in
+else $as_nop
+  case $EXPR in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_EXPR="$EXPR" # Let the user override the test with a path.
   ;;
@@ -5001,7 +4895,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 EXPR=$ac_cv_path_EXPR
@@ -5035,8 +4928,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_BASENAME+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $BASENAME in
+else $as_nop
+  case $BASENAME in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_BASENAME="$BASENAME" # Let the user override the test with a path.
   ;;
@@ -5061,7 +4954,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 BASENAME=$ac_cv_path_BASENAME
@@ -5095,8 +4987,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_BC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $BC in
+else $as_nop
+  case $BC in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_BC="$BC" # Let the user override the test with a path.
   ;;
@@ -5121,7 +5013,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 BC=$ac_cv_path_BC
@@ -5153,8 +5044,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_TO_POD2MAN+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PATH_TO_POD2MAN in
+else $as_nop
+  case $PATH_TO_POD2MAN in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_TO_POD2MAN="$PATH_TO_POD2MAN" # Let the user override the test with a path.
   ;;
@@ -5180,7 +5071,6 @@ IFS=$as_save_IFS
 
   test -z "$ac_cv_path_PATH_TO_POD2MAN" && ac_cv_path_PATH_TO_POD2MAN="UNKNOWN_POD2MAN"
   ;;
-esac ;;
 esac
 fi
 PATH_TO_POD2MAN=$ac_cv_path_PATH_TO_POD2MAN
@@ -5201,8 +5091,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_TO_GIT+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PATH_TO_GIT in
+else $as_nop
+  case $PATH_TO_GIT in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_TO_GIT="$PATH_TO_GIT" # Let the user override the test with a path.
   ;;
@@ -5228,7 +5118,6 @@ IFS=$as_save_IFS
 
   test -z "$ac_cv_path_PATH_TO_GIT" && ac_cv_path_PATH_TO_GIT=""""
   ;;
-esac ;;
 esac
 fi
 PATH_TO_GIT=$ac_cv_path_PATH_TO_GIT
@@ -5250,8 +5139,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_TO_PAGER+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PATH_TO_PAGER in
+else $as_nop
+  case $PATH_TO_PAGER in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_TO_PAGER="$PATH_TO_PAGER" # Let the user override the test with a path.
   ;;
@@ -5276,7 +5165,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 PATH_TO_PAGER=$ac_cv_path_PATH_TO_PAGER
@@ -5303,8 +5191,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_TO_HASHSUM+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PATH_TO_HASHSUM in
+else $as_nop
+  case $PATH_TO_HASHSUM in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_TO_HASHSUM="$PATH_TO_HASHSUM" # Let the user override the test with a path.
   ;;
@@ -5329,7 +5217,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 PATH_TO_HASHSUM=$ac_cv_path_PATH_TO_HASHSUM
@@ -5363,8 +5250,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_TO_TCLSH+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PATH_TO_TCLSH in
+else $as_nop
+  case $PATH_TO_TCLSH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_TO_TCLSH="$PATH_TO_TCLSH" # Let the user override the test with a path.
   ;;
@@ -5390,7 +5277,6 @@ IFS=$as_save_IFS
 
   test -z "$ac_cv_path_PATH_TO_TCLSH" && ac_cv_path_PATH_TO_TCLSH="UNKNOWN_TCLSH"
   ;;
-esac ;;
 esac
 fi
 PATH_TO_TCLSH=$ac_cv_path_PATH_TO_TCLSH
@@ -5419,8 +5305,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_TO_TR+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PATH_TO_TR in
+else $as_nop
+  case $PATH_TO_TR in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_TO_TR="$PATH_TO_TR" # Let the user override the test with a path.
   ;;
@@ -5445,7 +5331,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 PATH_TO_TR=$ac_cv_path_PATH_TO_TR
@@ -5471,8 +5356,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_TO_LS+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $PATH_TO_LS in
+else $as_nop
+  case $PATH_TO_LS in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_TO_LS="$PATH_TO_LS" # Let the user override the test with a path.
   ;;
@@ -5497,7 +5382,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 PATH_TO_LS=$ac_cv_path_PATH_TO_LS
@@ -5563,8 +5447,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_FIND_PATH_TO_LUA+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $FIND_PATH_TO_LUA in
+else $as_nop
+  case $FIND_PATH_TO_LUA in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_FIND_PATH_TO_LUA="$FIND_PATH_TO_LUA" # Let the user override the test with a path.
   ;;
@@ -5589,7 +5473,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 FIND_PATH_TO_LUA=$ac_cv_path_FIND_PATH_TO_LUA
@@ -5619,8 +5502,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_FIND_PATH_TO_LUAC+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $FIND_PATH_TO_LUAC in
+else $as_nop
+  case $FIND_PATH_TO_LUAC in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_FIND_PATH_TO_LUAC="$FIND_PATH_TO_LUAC" # Let the user override the test with a path.
   ;;
@@ -5645,7 +5528,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 FIND_PATH_TO_LUAC=$ac_cv_path_FIND_PATH_TO_LUAC
@@ -5792,8 +5674,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_pkgConfig+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $pkgConfig in
+else $as_nop
+  case $pkgConfig in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_pkgConfig="$pkgConfig" # Let the user override the test with a path.
   ;;
@@ -5819,7 +5701,6 @@ IFS=$as_save_IFS
 
   test -z "$ac_cv_path_pkgConfig" && ac_cv_path_pkgConfig=""""
   ;;
-esac ;;
 esac
 fi
 pkgConfig=$ac_cv_path_pkgConfig
@@ -5889,8 +5770,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_ZSH+y}
 then :
   printf %s "(cached) " >&6
-else case e in #(
-  e) case $ZSH in
+else $as_nop
+  case $ZSH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_ZSH="$ZSH" # Let the user override the test with a path.
   ;;
@@ -5915,7 +5796,6 @@ done
 IFS=$as_save_IFS
 
   ;;
-esac ;;
 esac
 fi
 ZSH=$ac_cv_path_ZSH
@@ -5999,8 +5879,8 @@ cat >confcache <<\_ACEOF
 # config.status only pays attention to the cache file if you give it
 # the --recheck option to rerun configure.
 #
-# 'ac_cv_env_foo' variables (set or unset) will be overridden when
-# loading this file, other *unset* 'ac_cv_foo' will be assigned the
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
 # following values.
 
 _ACEOF
@@ -6030,14 +5910,14 @@ printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;}
   (set) 2>&1 |
     case $as_nl`(ac_space=' '; set) 2>&1` in #(
     *${as_nl}ac_space=\ *)
-      # 'set' does not quote correctly, so add quotes: double-quote
+      # `set' does not quote correctly, so add quotes: double-quote
       # substitution turns \\\\ into \\, and sed turns \\ into \.
       sed -n \
 	"s/'/'\\\\''/g;
 	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
       ;; #(
     *)
-      # 'set' quotes correctly as required by POSIX, so do not add quotes.
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
       sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
       ;;
     esac |
@@ -6101,7 +5981,9 @@ s/^[	 ]*#[	 ]*define[	 ][	 ]*\([^	 ][^	 ]*\)[	 ]*\(.*\)/-D\1=\2/g
 t quote
 b any
 :quote
-s/[][	 `~#$^&*(){}\\|;'\''"<>?]/\\&/g
+s/[	 `~#$^&*(){}\\|;'\''"<>?]/\\&/g
+s/\[/\\&/g
+s/\]/\\&/g
 s/\$/$$/g
 H
 :any
@@ -6161,6 +6043,7 @@ cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
+as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
@@ -6169,13 +6052,12 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else case e in #(
-  e) case `(set -o) 2>/dev/null` in #(
+else $as_nop
+  case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
-esac ;;
 esac
 fi
 
@@ -6247,7 +6129,7 @@ IFS=$as_save_IFS
 
      ;;
 esac
-# We did not find ourselves, most probably we were run as 'sh COMMAND'
+# We did not find ourselves, most probably we were run as `sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
@@ -6276,6 +6158,7 @@ as_fn_error ()
 } # as_fn_error
 
 
+
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
@@ -6315,12 +6198,11 @@ then :
   {
     eval $1+=\$2
   }'
-else case e in #(
-  e) as_fn_append ()
+else $as_nop
+  as_fn_append ()
   {
     eval $1=\$$1\$2
-  } ;;
-esac
+  }
 fi # as_fn_append
 
 # as_fn_arith ARG...
@@ -6334,12 +6216,11 @@ then :
   {
     as_val=$(( $* ))
   }'
-else case e in #(
-  e) as_fn_arith ()
+else $as_nop
+  as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
-  } ;;
-esac
+  }
 fi # as_fn_arith
 
 
@@ -6422,9 +6303,9 @@ if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
-    # 1) On MSYS, both 'ln -s file dir' and 'ln file dir' fail.
-    # 2) DJGPP < 2.04 has no symlinks; 'ln -s' creates a wrapper executable.
-    # In both cases, we have to default to 'cp -pR'.
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
@@ -6505,12 +6386,10 @@ as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
-as_sed_cpp="y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
-as_tr_cpp="eval sed '$as_sed_cpp'" # deprecated
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
 
 # Sed expression to map a string onto a valid variable name.
-as_sed_sh="y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
-as_tr_sh="eval sed '$as_sed_sh'" # deprecated
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
 
 
 exec 6>&1
@@ -6526,7 +6405,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # values after options handling.
 ac_log="
 This file was extended by $as_me, which was
-generated by GNU Autoconf 2.72.  Invocation command line was
+generated by GNU Autoconf 2.71.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -6553,7 +6432,7 @@ _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 ac_cs_usage="\
-'$as_me' instantiates files and other configuration actions
+\`$as_me' instantiates files and other configuration actions
 from templates according to the current configuration.  Unless the files
 and actions are specified as TAGs, all are instantiated by default.
 
@@ -6581,10 +6460,10 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
 config.status
-configured by $0, generated by GNU Autoconf 2.72,
+configured by $0, generated by GNU Autoconf 2.71,
   with options \\"\$ac_cs_config\\"
 
-Copyright (C) 2023 Free Software Foundation, Inc.
+Copyright (C) 2021 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 
@@ -6641,8 +6520,8 @@ do
     ac_cs_silent=: ;;
 
   # This is an error.
-  -*) as_fn_error $? "unrecognized option: '$1'
-Try '$0 --help' for more information." ;;
+  -*) as_fn_error $? "unrecognized option: \`$1'
+Try \`$0 --help' for more information." ;;
 
   *) as_fn_append ac_config_targets " $1"
      ac_need_defaults=false ;;
@@ -6692,7 +6571,7 @@ do
   case $ac_config_target in
     "makefile") CONFIG_FILES="$CONFIG_FILES makefile:Makefile.in" ;;
 
-  *) as_fn_error $? "invalid argument: '$ac_config_target'" "$LINENO" 5;;
+  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
   esac
 done
 
@@ -6710,7 +6589,7 @@ fi
 # creating and moving files from /tmp can sometimes cause problems.
 # Hook for its removal unless debugging.
 # Note that there is a small window in which the directory will not be cleaned:
-# after its creation but before its name has been assigned to '$tmp'.
+# after its creation but before its name has been assigned to `$tmp'.
 $debug ||
 {
   tmp= ac_tmp=
@@ -6734,7 +6613,7 @@ ac_tmp=$tmp
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
-# This happens for instance with './config.status config.h'.
+# This happens for instance with `./config.status config.h'.
 if test -n "$CONFIG_FILES"; then
 
 
@@ -6900,7 +6779,7 @@ do
   esac
   case $ac_mode$ac_tag in
   :[FHL]*:*);;
-  :L* | :C*:*) as_fn_error $? "invalid tag '$ac_tag'" "$LINENO" 5;;
+  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
   :[FH]-) ac_tag=-:-;;
   :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
   esac
@@ -6922,19 +6801,19 @@ do
       -) ac_f="$ac_tmp/stdin";;
       *) # Look for the file first in the build tree, then in the source tree
 	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
-	 # because $ac_f cannot contain ':'.
+	 # because $ac_f cannot contain `:'.
 	 test -f "$ac_f" ||
 	   case $ac_f in
 	   [\\/$]*) false;;
 	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
 	   esac ||
-	   as_fn_error 1 "cannot find input file: '$ac_f'" "$LINENO" 5;;
+	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
       esac
       case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
       as_fn_append ac_file_inputs " '$ac_f'"
     done
 
-    # Let's still pretend it is 'configure' which instantiates (i.e., don't
+    # Let's still pretend it is `configure' which instantiates (i.e., don't
     # use $as_me), people would be surprised to read:
     #    /* config.h.  Generated by config.status.  */
     configure_input='Generated from '`
@@ -7058,7 +6937,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 esac
 _ACEOF
 
-# Neutralize VPATH when '$srcdir' = '.'.
+# Neutralize VPATH when `$srcdir' = `.'.
 # Shell code in configure.ac might set extrasub.
 # FIXME: do we really want to maintain this feature?
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
@@ -7087,9 +6966,9 @@ test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
   { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
       "$ac_tmp/out"`; test -z "$ac_out"; } &&
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable 'datarootdir'
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
-printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable 'datarootdir'
+printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
   rm -f "$ac_tmp/stdin"