diff --git a/configure.ac b/configure.ac index 9a653b8..c3d58cf 100644 --- a/configure.ac +++ b/configure.ac @@ -1,359 +1,358 @@ # configure.ac: Configure script for Scute. # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2015 g10 Code GmbH # # This file is part of Scute. # # Scute is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as # published by the Free Software Foundation; either version 2.1 of # the License, or (at your option) any later version. # # Scute 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 # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this program; if not, see . # SPDX-License-Identifier: LGPL-2.1-or-later # Process this file with autoconf to produce a configure script. AC_PREREQ([2.61]) min_automake_version="1.16.3" # To build a release you need to create a tag with the version number # (git tag -s scute-1.n.m) and run "./autogen.sh --force". Please # bump the version number immediately *after* the release and do # another commit and push so that the git magic is able to work. m4_define([mym4_package],[scute]) m4_define([mym4_major], [1]) m4_define([mym4_minor], [7]) m4_define([mym4_micro], [1]) # To start a new development series, i.e a new major or minor number # you need to mark an arbitrary commit before the first beta release # with an annotated tag. For example the 1.5 branch starts off with # the tag "scute-1.5-base". This is used as the base for counting # beta numbers before the first release of a series. # Below is m4 magic to extract and compute the git revision number, # the decimalized short revision number, a beta version string and a # flag indicating a development version (mym4_isbeta). Note that the # m4 processing is done by autoconf and not during the configure run. m4_define([mym4_verslist], m4_split(m4_esyscmd([./autogen.sh --find-version] \ mym4_package mym4_major mym4_minor mym4_micro),[:])) m4_define([mym4_isbeta], m4_argn(2, mym4_verslist)) m4_define([mym4_version], m4_argn(4, mym4_verslist)) m4_define([mym4_revision], m4_argn(7, mym4_verslist)) m4_define([mym4_revision_dec], m4_argn(8, mym4_verslist)) m4_esyscmd([echo ]mym4_version[>VERSION]) AC_INIT([mym4_package],[mym4_version],[https://bugs.gnupg.org]) # LT Version numbers, remember to change them just *before* a release. # (Code changed: REVISION++) # (Interfaces added/removed/changed: CURRENT++, REVISION=0) # (Interfaces added: AGE++) # (Interfaces removed/changed: AGE=0) # LIBSCUTE_LT_CURRENT=0 LIBSCUTE_LT_AGE=0 LIBSCUTE_LT_REVISION=5 # Version numbers reported by the PKCS #11 module to its users. VERSION_MAJOR=1 VERSION_MINOR=0 NEED_GPG_ERROR_VERSION=1.38 NEED_LIBASSUAN_VERSION=2.5.0 # Some status variables to give feedback at the end of a configure run. have_gpg_error=no have_libassuan=no # # Provide information about the build. # BUILD_REVISION="mym4_revision" BUILD_REVISION_DEC="mym4_revision_dec" PACKAGE=$PACKAGE_NAME VERSION=$PACKAGE_VERSION AC_CONFIG_AUX_DIR([build-aux]) AC_CONFIG_SRCDIR([src/cryptoki.h]) -AC_CONFIG_HEADER([config.h]) +AC_CONFIG_HEADERS([config.h]) AC_CONFIG_MACRO_DIR(m4) AM_INIT_AUTOMAKE AM_MAINTAINER_MODE AC_CANONICAL_HOST # Autobuilder support. AB_INIT # Enable GNU extensions on systems that have them. AC_USE_SYSTEM_EXTENSIONS AH_VERBATIM([_REENTRANT], [/* To allow the use of scute in multithreaded programs we have to use special features from the library. */ #ifndef _REENTRANT # define _REENTRANT 1 #endif]) # Checks for programs. AC_PROG_CC # Check for programs needed for the manual. AC_CHECK_PROG(YAT2M, yat2m, yat2m) have_doc_tools=no if test -n "$ac_cv_prog_YAT2M" ; then have_doc_tools=yes fi # Note: A suitable gitlog-to-changelog script can be found in GnuPG master. AC_CHECK_PROGS(GITLOG_TO_CHANGELOG, gitlog-to-changelog, [gitlog-to-changelog]) # # Setup gcc specific options # AC_MSG_NOTICE([checking for cc features]) if test "$GCC" = yes; then mycflags= mycflags_save=$CFLAGS # Check whether gcc does not emit a diagnositc for unknow -Wno-* # options. This is the case for gcc >= 4.6 AC_MSG_CHECKING([if gcc ignores unknown -Wno-* options]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6 ) #kickerror #endif]],[])],[_gcc_silent_wno=yes],[_gcc_silent_wno=no]) AC_MSG_RESULT($_gcc_silent_wno) # Note that it is okay to use CFLAGS here because these are just # warning options and the user should have a chance of overriding # them. if test "$USE_MAINTAINER_MODE" = "yes"; then mycflags="$mycflags -O3 -Wall -Wcast-align -Wshadow -Wstrict-prototypes" mycflags="$mycflags -Wformat -Wno-format-y2k -Wformat-security" if test x"$_gcc_silent_wno" = xyes ; then _gcc_wopt=yes else AC_MSG_CHECKING([if gcc supports -Wno-missing-field-initializers]) CFLAGS="-Wno-missing-field-initializers" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], [_gcc_wopt=yes],[_gcc_wopt=no]) AC_MSG_RESULT($_gcc_wopt) fi if test x"$_gcc_wopt" = xyes ; then mycflags="$mycflags -W -Wno-sign-compare" mycflags="$mycflags -Wno-missing-field-initializers" fi AC_MSG_CHECKING([if gcc supports -Wdeclaration-after-statement]) CFLAGS="-Wdeclaration-after-statement" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no) AC_MSG_RESULT($_gcc_wopt) if test x"$_gcc_wopt" = xyes ; then mycflags="$mycflags -Wdeclaration-after-statement" fi else mycflags="$mycflags -Wall" fi if test x"$_gcc_silent_wno" = xyes ; then _gcc_psign=yes else AC_MSG_CHECKING([if gcc supports -Wno-pointer-sign]) CFLAGS="-Wno-pointer-sign" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], [_gcc_psign=yes],[_gcc_psign=no]) AC_MSG_RESULT($_gcc_psign) fi if test x"$_gcc_psign" = xyes ; then mycflags="$mycflags -Wno-pointer-sign" fi AC_MSG_CHECKING([if gcc supports -Wpointer-arith]) CFLAGS="-Wpointer-arith" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_psign=yes,_gcc_psign=no) AC_MSG_RESULT($_gcc_psign) if test x"$_gcc_psign" = xyes ; then mycflags="$mycflags -Wpointer-arith" fi CFLAGS="$mycflags $mycflags_save" fi AC_ARG_ENABLE(optimization, AS_HELP_STRING([--disable-optimization], [disable compiler optimization]), [if test $enableval = no ; then CFLAGS=`echo $CFLAGS | sed 's/-O[[0-9]]//'` fi]) # # Option to disable building of doc file # build_doc=yes AC_ARG_ENABLE([doc], AS_HELP_STRING([--disable-doc], [do not build the documentation]), build_doc=$enableval, build_doc=yes) AM_CONDITIONAL([BUILD_DOC], [test "x$build_doc" != xno && test "x$have_doc_tools" = xyes]) AC_SUBST(LIBSCUTE_LT_CURRENT) AC_SUBST(LIBSCUTE_LT_AGE) AC_SUBST(LIBSCUTE_LT_REVISION) AC_SUBST(PACKAGE) AC_SUBST(VERSION) AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of this package]) AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version of this package]) AC_DEFINE_UNQUOTED(VERSION_MAJOR, $VERSION_MAJOR, [Major version number]) AC_DEFINE_UNQUOTED(VERSION_MINOR, $VERSION_MINOR, [Minor version number]) # Don't default to build static libs. # FIXME: Caution: Evil hack ahead. Libtool does not support linking a # static library to a shared library. But for libassuan, we need this. # Instead adding a lot of junk to Makefile.am to get this, we just override # all safety checks here. We are driving without seat belts now! # http://lists.cairographics.org/archives/cairo/2009-April/016962.html lt_cv_deplibs_check_method=pass_all LT_PREREQ([2.2.6]) LT_INIT([win32-dll disable-static]) LT_LANG([Windows Resource]) # For now we hardcode the use of version scripts. It would be better # to write a test for this or even implement this within libtool. have_ld_version_script=no case "${host}" in *-*-linux*) have_ld_version_script=yes ;; *-*-gnu*) have_ld_version_script=yes ;; *-apple-darwin*) AC_DEFINE(_DARWIN_C_SOURCE, 900000L, Expose all libc features (__DARWIN_C_FULL).) AC_DEFINE(_XOPEN_SOURCE, 500, Activate POSIX interface on MacOS X) ;; esac AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes") have_w32_system=no have_darwin_system=no case "${host}" in *-mingw32*) # special stuff for Windows NT have_w32_system=yes ;; *-apple-darwin*) have_darwin_system=yes ;; *) ;; esac if test "$have_w32_system" = yes; then AC_DEFINE(HAVE_W32_SYSTEM,1, [Defined if we run on a W32 API based system]) fi AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes) AM_CONDITIONAL(HAVE_DARWIN_SYSTEM, test "$have_darwin_system" = yes) # Generate values for the DLL version info if test "$have_w32_system" = yes; then BUILD_TIMESTAMP=`date --iso-8601=minutes` changequote(,)dnl BUILD_FILEVERSION=`echo "$VERSION" | sed 's/\([0-9.]*\).*/\1./;s/\./,/g'` changequote([,])dnl BUILD_FILEVERSION="${BUILD_FILEVERSION}${BUILD_REVISION_DEC}" fi AC_SUBST(BUILD_REVISION) AC_SUBST(BUILD_REVISION_DEC) AC_SUBST(BUILD_TIMESTAMP) AC_SUBST(BUILD_FILEVERSION) # The error code library. Error codes are sent over the IPC layer and # have to be interpreted. AM_PATH_GPG_ERROR("$NEED_GPG_ERROR_VERSION", have_gpg_error=yes, have_gpg_error=no) # The IPC library. AM_PATH_LIBASSUAN("$NEED_LIBASSUAN_VERSION", have_libassuan=yes, have_libassuan=no) # Checks for header files. -AC_HEADER_STDC AC_CHECK_HEADERS([stdlib.h string.h]) # Checks for typedefs, structures, and compiler characteristics. AC_HEADER_STDBOOL AC_C_INLINE # Checks for library functions. AC_CHECK_FUNCS([ttyname localtime_r timegm stpcpy]) # Test if tests can be run ok=yes AM_CONDITIONAL(RUN_TESTS, test "$ok" = "yes") AH_BOTTOM([ /* Prefix all estream functions. */ #define _ESTREAM_EXT_SYM_PREFIX _scute_ ]) # Print errors here so that they are visible all # together and the user can acquire them all together. die=no if test "$have_gpg_error" = "no"; then die=yes AC_MSG_NOTICE([[ *** *** You need libgpg-error to build this program. *** This library is for example available at *** ftp://ftp.gnupg.org/pub/gcrypt/libgpg-error *** (at least version $NEED_GPG_ERROR_VERSION is required.) ***]]) fi if test "$have_libassuan" = "no"; then die=yes AC_MSG_NOTICE([[ *** *** You need libassuan to build this program. *** This library is for example available at *** ftp://ftp.gnupg.org/pub/gcrypt/alpha/libassuan/ *** (at least version $NEED_LIBASSUAN_VERSION is required). ***]]) fi if test "$die" = "yes"; then AC_MSG_ERROR([[ *** *** Required libraries not found. Please consult the above messages *** and install them before running configure again. ***]]) fi AC_CONFIG_FILES([Makefile m4/Makefile src/Makefile tests/Makefile doc/Makefile src/versioninfo.rc]) AC_OUTPUT echo " Scute v${VERSION} has been configured as follows: Revision: mym4_revision (mym4_revision_dec) Platform: $host " diff --git a/m4/gpg-error.m4 b/m4/gpg-error.m4 index c9b235f..4b5cd40 100644 --- a/m4/gpg-error.m4 +++ b/m4/gpg-error.m4 @@ -1,188 +1,208 @@ # gpg-error.m4 - autoconf macro to detect libgpg-error. -# Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018, 2020 g10 Code GmbH +# Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018, 2020, 2021 +# g10 Code GmbH # # This file is free software; as a special exception the author gives # unlimited permission to copy and/or distribute it, with or without # modifications, as long as this notice is preserved. # # This file is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # -# Last-changed: 2020-11-17 +# Last-changed: 2022-02-15 dnl AM_PATH_GPG_ERROR([MINIMUM-VERSION, dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]]) dnl dnl Test for libgpg-error and define GPG_ERROR_CFLAGS, GPG_ERROR_LIBS, dnl GPG_ERROR_MT_CFLAGS, and GPG_ERROR_MT_LIBS. The _MT_ variants are dnl used for programs requireing real multi thread support. dnl dnl If a prefix option is not used, the config script is first dnl searched in $SYSROOT/bin and then along $PATH. If the used dnl config script does not match the host specification the script dnl is added to the gpg_config_script_warn variable. dnl AC_DEFUN([AM_PATH_GPG_ERROR], [ AC_REQUIRE([AC_CANONICAL_HOST]) gpg_error_config_prefix="" dnl --with-libgpg-error-prefix=PFX is the preferred name for this option, dnl since that is consistent with how our three siblings use the directory/ dnl package name in --with-$dir_name-prefix=PFX. AC_ARG_WITH(libgpg-error-prefix, AS_HELP_STRING([--with-libgpg-error-prefix=PFX], [prefix where GPG Error is installed (optional)]), [gpg_error_config_prefix="$withval"]) dnl Accept --with-gpg-error-prefix and make it work the same as dnl --with-libgpg-error-prefix above, for backwards compatibility, dnl but do not document this old, inconsistently-named option. AC_ARG_WITH(gpg-error-prefix,, [gpg_error_config_prefix="$withval"]) if test x"${GPG_ERROR_CONFIG}" = x ; then if test x"${gpg_error_config_prefix}" != x ; then GPG_ERROR_CONFIG="${gpg_error_config_prefix}/bin/gpg-error-config" else case "${SYSROOT}" in /*) if test -x "${SYSROOT}/bin/gpg-error-config" ; then GPG_ERROR_CONFIG="${SYSROOT}/bin/gpg-error-config" fi ;; '') ;; *) AC_MSG_WARN([Ignoring \$SYSROOT as it is not an absolute path.]) ;; esac fi fi AC_PATH_PROG(GPG_ERROR_CONFIG, gpg-error-config, no) min_gpg_error_version=ifelse([$1], ,1.33,$1) ok=no - if test "$prefix" = NONE ; then - prefix_option_expanded=/usr/local - else - prefix_option_expanded="$prefix" - fi - if test "$exec_prefix" = NONE ; then - exec_prefix_option_expanded=$prefix_option_expanded - else - exec_prefix_option_expanded=$(prefix=$prefix_option_expanded eval echo $exec_prefix) - fi - libdir_option_expanded=$(prefix=$prefix_option_expanded exec_prefix=$exec_prefix_option_expanded eval echo $libdir) + AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no, [$prefix/bin:$PATH]) + if test "$GPGRT_CONFIG" != "no"; then + # Determine gpgrt_libdir + # + # Get the prefix of gpgrt-config assuming it's something like: + # /bin/gpgrt-config + gpgrt_prefix=${GPGRT_CONFIG%/*/*} + possible_libdir1=${gpgrt_prefix}/lib + # Determine by using system libdir-format with CC, it's like: + # Normal style: /usr/lib + # GNU cross style: /usr//lib + # Debian style: /usr/lib/ + # Fedora/openSUSE style: /usr/lib, /usr/lib32 or /usr/lib64 + # It is assumed that CC is specified to the one of host on cross build. + if libdir_candidates=$(${CC:-cc} -print-search-dirs | \ + sed -n -e "/^libraries/{s/libraries: =//;s/:/\\ +/g;p;}"); then + # From the output of -print-search-dirs, select valid pkgconfig dirs. + libdir_candidates=$(for dir in $libdir_candidates; do + if p=$(cd $dir 2>/dev/null && pwd); then + test -d "$p/pkgconfig" && echo $p; + fi + done) - if test -f $libdir_option_expanded/pkgconfig/gpg-error.pc; then - gpgrt_libdir=$libdir_option_expanded - else - if crt1_path=$(${CC:-cc} -print-file-name=crt1.o 2>/dev/null); then - if possible_libdir=$(cd ${crt1_path%/*} && pwd 2>/dev/null); then - if test -f $possible_libdir/pkgconfig/gpg-error.pc; then - gpgrt_libdir=$possible_libdir + for possible_libdir0 in $libdir_candidates; do + # possible_libdir0: + # Fallback candidate, the one of system-installed (by $CC) + # (/usr//lib, /usr/lib/ or /usr/lib32) + # possible_libdir1: + # Another candidate, user-locally-installed + # (/lib) + # possible_libdir2 + # Most preferred + # (//lib, + # /lib/ or /lib32) + if test "${possible_libdir0##*/}" = "lib"; then + possible_prefix0=${possible_libdir0%/lib} + possible_prefix0_triplet=${possible_prefix0##*/} + if test -z "$possible_prefix0_triplet"; then + continue + fi + possible_libdir2=${gpgrt_prefix}/$possible_prefix0_triplet/lib + else + possible_prefix0=${possible_libdir0%%/lib*} + possible_libdir2=${gpgrt_prefix}${possible_libdir0#$possible_prefix0} fi - fi + if test -f ${possible_libdir2}/pkgconfig/gpg-error.pc; then + gpgrt_libdir=${possible_libdir2} + elif test -f ${possible_libdir1}/pkgconfig/gpg-error.pc; then + gpgrt_libdir=${possible_libdir1} + elif test -f ${possible_libdir0}/pkgconfig/gpg-error.pc; then + gpgrt_libdir=${possible_libdir0} + fi + if test -n "$gpgrt_libdir"; then break; fi + done + else + # When we cannot determine system libdir-format, use this: + gpgrt_libdir=${possible_libdir1} fi + else + unset GPGRT_CONFIG fi - if test "$GPG_ERROR_CONFIG" = "no" -a -n "$gpgrt_libdir"; then - AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no) - if test "$GPGRT_CONFIG" = "no"; then - unset GPGRT_CONFIG + if test -n "$gpgrt_libdir"; then + GPGRT_CONFIG="$GPGRT_CONFIG --libdir=$gpgrt_libdir" + if $GPGRT_CONFIG gpg-error >/dev/null 2>&1; then + GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error" + AC_MSG_NOTICE([Use gpgrt-config with $gpgrt_libdir as gpg-error-config]) + gpg_error_config_version=`$GPG_ERROR_CONFIG --modversion` else - GPGRT_CONFIG="$GPGRT_CONFIG --libdir=$gpgrt_libdir" - if $GPGRT_CONFIG gpg-error >/dev/null 2>&1; then - GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error" - AC_MSG_NOTICE([Use gpgrt-config with $gpgrt_libdir as gpg-error-config]) - gpg_error_config_version=`$GPG_ERROR_CONFIG --modversion` - else - unset GPGRT_CONFIG - fi + unset GPGRT_CONFIG fi - else + elif test "$GPG_ERROR_CONFIG" != "no"; then gpg_error_config_version=`$GPG_ERROR_CONFIG --version` + unset GPGRT_CONFIG fi if test "$GPG_ERROR_CONFIG" != "no"; then req_major=`echo $min_gpg_error_version | \ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\1/'` req_minor=`echo $min_gpg_error_version | \ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\2/'` major=`echo $gpg_error_config_version | \ sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'` minor=`echo $gpg_error_config_version | \ sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'` if test "$major" -gt "$req_major"; then ok=yes else if test "$major" -eq "$req_major"; then if test "$minor" -ge "$req_minor"; then ok=yes fi fi fi - if test -z "$GPGRT_CONFIG" -a -n "$gpgrt_libdir"; then - if test "$major" -gt 1 -o "$major" -eq 1 -a "$minor" -ge 33; then - AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no) - if test "$GPGRT_CONFIG" = "no"; then - unset GPGRT_CONFIG - else - GPGRT_CONFIG="$GPGRT_CONFIG --libdir=$gpgrt_libdir" - if $GPGRT_CONFIG gpg-error >/dev/null 2>&1; then - GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error" - AC_MSG_NOTICE([Use gpgrt-config with $gpgrt_libdir as gpg-error-config]) - else - unset GPGRT_CONFIG - fi - fi - fi - fi fi AC_MSG_CHECKING(for GPG Error - version >= $min_gpg_error_version) if test $ok = yes; then GPG_ERROR_CFLAGS=`$GPG_ERROR_CONFIG --cflags` GPG_ERROR_LIBS=`$GPG_ERROR_CONFIG --libs` if test -z "$GPGRT_CONFIG"; then GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --mt --cflags 2>/dev/null` GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --mt --libs 2>/dev/null` else GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --variable=mtcflags 2>/dev/null` GPG_ERROR_MT_CFLAGS="$GPG_ERROR_CFLAGS${GPG_ERROR_CFLAGS:+ }$GPG_ERROR_MT_CFLAGS" GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --variable=mtlibs 2>/dev/null` GPG_ERROR_MT_LIBS="$GPG_ERROR_LIBS${GPG_ERROR_LIBS:+ }$GPG_ERROR_MT_LIBS" fi AC_MSG_RESULT([yes ($gpg_error_config_version)]) ifelse([$2], , :, [$2]) if test -z "$GPGRT_CONFIG"; then gpg_error_config_host=`$GPG_ERROR_CONFIG --host 2>/dev/null || echo none` else gpg_error_config_host=`$GPG_ERROR_CONFIG --variable=host 2>/dev/null || echo none` fi if test x"$gpg_error_config_host" != xnone ; then if test x"$gpg_error_config_host" != x"$host" ; then AC_MSG_WARN([[ *** *** The config script "$GPG_ERROR_CONFIG" was *** built for $gpg_error_config_host and thus may not match the *** used host $host. *** You may want to use the configure option --with-libgpg-error-prefix *** to specify a matching config script or use \$SYSROOT. ***]]) gpg_config_script_warn="$gpg_config_script_warn libgpg-error" fi fi else GPG_ERROR_CFLAGS="" GPG_ERROR_LIBS="" GPG_ERROR_MT_CFLAGS="" GPG_ERROR_MT_LIBS="" AC_MSG_RESULT(no) ifelse([$3], , :, [$3]) fi AC_SUBST(GPG_ERROR_CFLAGS) AC_SUBST(GPG_ERROR_LIBS) AC_SUBST(GPG_ERROR_MT_CFLAGS) AC_SUBST(GPG_ERROR_MT_LIBS) ])