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configure.ac
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configure.ac
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#
# s3backer - FUSE-based single file backing store via Amazon S3
#
# Copyright 2008-2020 Archie L. Cobbs <archie.cobbs@gmail.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the
# OpenSSL library under certain conditions as described in each
# individual source file, and distribute linked combinations including
# the two.
#
# You must obey the GNU General Public License in all respects for all
# of the code used other than OpenSSL. If you modify file(s) with this
# exception, you may extend this exception to your version of the
# file(s), but you are not obligated to do so. If you do not wish to do
# so, delete this exception statement from your version. If you delete
# this exception statement from all source files in the program, then
# also delete it here.
AC_INIT([s3backer FUSE filesystem backed by Amazon S3],[2.0.2],[https://github.com/archiecobbs/s3backer],[s3backer])
AC_CONFIG_AUX_DIR(scripts)
AM_INIT_AUTOMAKE(foreign)
LT_INIT()
dnl AM_MAINTAINER_MODE
AC_PREREQ([2.69])
AC_PREFIX_DEFAULT(/usr)
AC_PROG_MAKE_SET
[CFLAGS="-g -O3 -pipe -Wall -Waggregate-return -Wcast-align -Wchar-subscripts -Wcomment -Wformat -Wimplicit -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-long-long -Wparentheses -Wpointer-arith -Wredundant-decls -Wreturn-type -Wswitch -Wtrigraphs -Wuninitialized -Wunused -Wwrite-strings -Wshadow -Wstrict-prototypes -Wcast-qual $CFLAGS"]
AC_SUBST(CFLAGS)
# Not sure why this is needed but it seems to help
AC_CONFIG_MACRO_DIRS([m4])
# Compile flags for Linux. See https://stackoverflow.com/a/29201732
AC_DEFINE(_GNU_SOURCE, 1, GNU functions)
AC_DEFINE(_BSD_SOURCE, 1, BSD functions)
AC_DEFINE(_DEFAULT_SOURCE, 1, Default functions)
# Compile flags for Mac OS
AC_DEFINE(_DARWIN_C_SOURCE, 1, MacOS functions)
# Compile flags for FUSE
AC_DEFINE(FUSE_USE_VERSION, 26, FUSE API version)
AC_DEFINE(FUSE_FALLOCATE, 0, FUSE fallocate() support)
# Check for required programs
AC_PROG_INSTALL
AC_PROG_CC
# Check for required pkg-config'd stuff
PKG_PROG_PKG_CONFIG(0.19)
PKG_CHECK_MODULES(FUSE, fuse,
[CFLAGS="${CFLAGS} ${FUSE_CFLAGS}"
LDFLAGS="${LDFLAGS} ${FUSE_LIBS}"],
[AC_MSG_ERROR(["fuse" not found in pkg-config])])
# Check for zstd (optional)
PKG_CHECK_MODULES([ZSTD], libzstd,
[AC_DEFINE([ZSTD], [1], [Whether zstd is available])
CFLAGS="${CFLAGS} ${ZSTD_CFLAGS}"
LDFLAGS="${LDFLAGS} ${ZSTD_LIBS}"],
[true])
# Check for NBDKit
PKG_CHECK_MODULES([NBDKIT], [nbdkit >= 1.24.1],
[AC_DEFINE([NBDKIT], [1], [Whether NBDKit is available])
NBDKIT_FOUND=true],
[NBDKIT_FOUND=false])
AC_SUBST([NBDKIT_FOUND])
AM_CONDITIONAL([NBDKIT_FOUND], [test "x$NBDKIT_FOUND" = xtrue])
# If NBDKit was found, find the plugin directory and executable
AS_IF([test "x$NBDKIT_FOUND" = xtrue], [
# Find nbdkit plugins directory
AC_MSG_CHECKING([NBDKit plugins directory])
PKG_CHECK_VAR([NBDKIT_PLUGINDIR], [nbdkit], [plugindir])
AS_IF([test "x$NBDKIT_PLUGINDIR" = "x"],
[AC_MSG_FAILURE([Unable to identify the NBDKit plugin directory.])],
[AC_MSG_RESULT([$NBDKIT_PLUGINDIR])])
# Find nbdkit(1)
AC_PATH_PROGS([NBDKIT_EXECUTABLE], [nbdkit])
AS_IF([test "x$NBDKIT_EXECUTABLE" = x], [AC_MSG_ERROR([required executable nbdkit not found])])
AC_DEFINE_UNQUOTED([NBDKIT_EXECUTABLE], ["$NBDKIT_EXECUTABLE"], [path to nbdkit(1) executable])
# Find nbd-client(8)
AC_PATH_PROGS([NBD_CLIENT_EXECUTABLE], [nbd-client])
AS_IF([test "x$NBD_CLIENT_EXECUTABLE" = x], [AC_MSG_ERROR([required executable nbd-client not found])])
AC_DEFINE_UNQUOTED([NBD_CLIENT_EXECUTABLE], ["$NBD_CLIENT_EXECUTABLE"], [path to nbd-client(8) executable])
])
# Define our directory for nbdkit(1) UNIX socket files, defaulting to /run/s3backer-nbd
AC_ARG_VAR([S3B_NBD_DIR], [directory containing UNIX socket files used by nbd-client])
AS_IF([test "x$S3B_NBD_DIR" = x], [S3B_NBD_DIR="/run/s3backer-nbd"])
#AC_SUBST([S3B_NBD_DIR])
AC_DEFINE_UNQUOTED([S3B_NBD_DIR], ["$S3B_NBD_DIR"], [nbdkit UNIX socket file directory])
# Check for required libraries
AC_CHECK_LIB(curl, curl_version,,
[AC_MSG_ERROR([required library libcurl missing])])
AC_CHECK_LIB(crypto, BIO_new,,
[AC_MSG_ERROR([required library libcrypto missing])])
AC_CHECK_LIB(expat, XML_ParserCreate,,
[AC_MSG_ERROR([required library expat missing])])
AC_CHECK_LIB(fuse, fuse_version,,
[AC_MSG_ERROR([required library libfuse missing])])
AC_CHECK_LIB(z, compressBound,,
[AC_MSG_ERROR([required library zlib missing])])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <curl/curl.h>
long x = CURLOPT_TCP_KEEPALIVE;
]])],, [AC_MSG_ERROR([unable to compile with curl, or curl version is < 7.25.0])])
# See if FUSE version is 2.9.2 or later
AC_MSG_CHECKING([for fallocate() support in fuse])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <fuse/fuse.h>
struct fuse_operations x = { fallocate: (void*)1 };
]])],[AC_MSG_RESULT([yes]); AC_DEFINE(FUSE_FALLOCATE)],AC_MSG_RESULT([no]))
# Set some O/S specific stuff
case `uname -s` in
Darwin|FreeBSD)
AC_CHECK_LIB(pthread, pthread_create,,
[AC_MSG_ERROR([required library libpthread missing])])
;;
Linux)
LDFLAGS="${LDFLAGS} -pthread"
;;
*)
;;
esac
# Check for some O/S specific functions
AC_CHECK_DECLS(fdatasync)
AC_CHECK_DECLS([posix_fadvise], [], [], [[#include <fcntl.h>]])
AC_CHECK_DECLS([prctl, PR_SET_IO_FLUSHER], [], [], [[#include <sys/prctl.h>]])
AC_CHECK_DECLS([fallocate, FALLOC_FL_PUNCH_HOLE, FALLOC_FL_KEEP_SIZE], [], [], [[#include <fcntl.h>]])
# Check for required header files
AC_CHECK_HEADERS(assert.h ctype.h curl/curl.h err.h errno.h expat.h pthread.h stdarg.h stddef.h stdint.h stdio.h stdlib.h string.h syslog.h time.h unistd.h sys/queue.h sys/statvfs.h openssl/bio.h openssl/buffer.h openssl/evp.h openssl/hmac.h openssl/md5.h zlib.h, [],
[AC_MSG_ERROR([required header file '$ac_header' missing])])
# Optional features
AC_ARG_ENABLE(assertions,
AS_HELP_STRING([--enable-assertions],[enable debugging sanity checks (default NO)]),
[test x"$enableval" = "xyes" || AC_DEFINE(NDEBUG, 1, [disable assertions])],
[AC_DEFINE(NDEBUG, 1, [disable assertions])])
AC_ARG_ENABLE(gprof,
AS_HELP_STRING([--enable-gprof],[Compile and link with gprof(1) support (default NO)]),
[test x"$enableval" = "xyes" && CFLAGS="${CFLAGS} -pg"])
AC_ARG_ENABLE(Werror,
AS_HELP_STRING([--enable-Werror],[enable compilation with -Werror flag (default NO)]),
[test x"$enableval" = "xyes" && CFLAGS="${CFLAGS} -Werror"])
AC_ARG_ENABLE(sanitize,
AS_HELP_STRING([--enable-sanitize],[enable compilation with -fsanitize=address and -fsanitize=undefined (default NO)]),
[test x"$enableval" = "xyes" && CFLAGS="${CFLAGS} -fsanitize=address -fsanitize=undefined"])
# Generated files
AC_CONFIG_FILES(Makefile)
AC_CONFIG_FILES(s3backer.1)
AM_CONFIG_HEADER(config.h)
# Go
AC_OUTPUT