changed way to search for libgmp - from AC_CHECK_LIB to PKG_CHECK_MOD…

…ULES

configure.ac

@@ -646,6 +646,7 @@ AC_MSG_NOTICE([Using boost linker options: [$BOOST_LIBS]])
 fi
 
 if test x$use_pkgconfig = xyes; then
+echo "test x$use_pkgconfig = xyes"
   : dnl
   m4_ifdef(
     [PKG_CHECK_MODULES],
@@ -668,9 +669,12 @@ if test x$use_pkgconfig = xyes; then
       else
           AC_DEFINE_UNQUOTED([ENABLE_ZMQ],[0],[Define to 1 to enable ZMQ functions])
       fi
+      PKG_CHECK_MODULES([GMP], [gmp],, [AC_MSG_ERROR(gmp  not found.)])
+      PKG_CHECK_MODULES([GMPXX], [gmpxx],, [AC_MSG_ERROR(gmpxx  not found.)])
     ]
   )
 else
+echo "test x$use_pkgconfig = xyes"
   # BUG: Fix this:
   echo 'BUG: configure does not yet check for the following dependencies if pkg-config is not on the system: libcrypto++, libgmp'
 
@@ -714,11 +718,11 @@ fi
 
 # These packages don't provide pkgconfig config files across all
 # platforms, so we use older autoconf detection mechanisms:
-AC_CHECK_HEADER([gmp.h],,AC_MSG_ERROR(libgmp headers missing))
-AC_CHECK_LIB([gmp],[[__gmpn_sub_n]],GMP_LIBS=-lgmp, [AC_MSG_ERROR(libgmp missing)])
+# AC_CHECK_HEADER([gmp.h],,AC_MSG_ERROR(libgmp headers missing))
+# AC_CHECK_LIB([gmp],[[__gmpn_sub_n]],GMP_LIBS=-lgmp, [AC_MSG_ERROR(libgmp missing)])
 
-AC_CHECK_HEADER([gmpxx.h],,AC_MSG_ERROR(libgmpxx headers missing))
-AC_CHECK_LIB([gmpxx],[main],GMPXX_LIBS=-lgmpxx, [AC_MSG_ERROR(libgmpxx missing)])
+# AC_CHECK_HEADER([gmpxx.h],,AC_MSG_ERROR(libgmpxx headers missing))
+# AC_CHECK_LIB([gmpxx],[main],GMPXX_LIBS=-lgmpxx, [AC_MSG_ERROR(libgmpxx missing)])
 
 RUST_LIBS="-lrustzcash"
 case $host in