dnl macros to configure gnupg dnl Copyright (C) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. dnl dnl This file is part of GnuPG. dnl dnl GnuPG is free software; you can redistribute it and/or modify dnl it under the terms of the GNU General Public License as published by dnl the Free Software Foundation; either version 2 of the License, or dnl (at your option) any later version. dnl dnl GnuPG is distributed in the hope that it will be useful, dnl but WITHOUT ANY WARRANTY; without even the implied warranty of dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the dnl GNU General Public License for more details. dnl dnl You should have received a copy of the GNU General Public License dnl along with this program; if not, write to the Free Software dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA dnl GNUPG_MSG_PRINT(STRING) dnl print a message dnl define(GNUPG_MSG_PRINT, [ echo $ac_n "$1"" $ac_c" 1>&AC_FD_MSG ]) dnl GNUPG_CHECK_TYPEDEF(TYPE, HAVE_NAME) dnl Check whether a typedef exists and create a #define $2 if it exists dnl AC_DEFUN([GNUPG_CHECK_TYPEDEF], [ AC_MSG_CHECKING(for $1 typedef) AC_CACHE_VAL(gnupg_cv_typedef_$1, [AC_TRY_COMPILE([#define _GNU_SOURCE 1 #include #include ], [ #undef $1 int a = sizeof($1); ], gnupg_cv_typedef_$1=yes, gnupg_cv_typedef_$1=no )]) AC_MSG_RESULT($gnupg_cv_typedef_$1) if test "$gnupg_cv_typedef_$1" = yes; then AC_DEFINE($2,1,[Defined if a `]$1[' is typedef'd]) fi ]) dnl GNUPG_CHECK_GNUMAKE dnl AC_DEFUN([GNUPG_CHECK_GNUMAKE], [ if ${MAKE-make} --version 2>/dev/null | grep '^GNU ' >/dev/null 2>&1; then : else AC_MSG_WARN([[ *** *** It seems that you are not using GNU make. Some make tools have serious *** flaws and you may not be able to build this software at all. Before you *** complain, please try GNU make: GNU make is easy to build and available *** at all GNU archives. It is always available from ftp.gnu.org:/gnu/make. ***]]) fi ]) dnl GNUPG_CHECK_FAQPROG dnl AC_DEFUN([GNUPG_CHECK_FAQPROG], [ AC_MSG_CHECKING(for faqprog.pl) if faqprog.pl -V 2>/dev/null | grep '^faqprog.pl ' >/dev/null 2>&1; then working_faqprog=yes FAQPROG="faqprog.pl" else working_faqprog=no FAQPROG=": " fi AC_MSG_RESULT($working_faqprog) AC_SUBST(FAQPROG) AM_CONDITIONAL(WORKING_FAQPROG, test "$working_faqprog" = "yes" ) dnl if test $working_faqprog = no; then dnl AC_MSG_WARN([[ dnl *** dnl *** It seems that the faqprog.pl program is not installed; dnl *** however it is only needed if you want to change the FAQ. dnl *** (faqprog.pl should be available at: dnl *** ftp://ftp.gnupg.org/gcrypt/contrib/faqprog.pl ) dnl *** No need to worry about this warning. dnl ***]]) dnl fi ]) dnl GNUPG_CHECK_DOCBOOK_TO_TEXI dnl AC_DEFUN([GNUPG_CHECK_DOCBOOK_TO_TEXI], [ AC_CHECK_PROG(DOCBOOK_TO_TEXI, docbook2texi, yes, no) AC_MSG_CHECKING(for sgml to texi tools) working_sgmltotexi=no if test "$ac_cv_prog_DOCBOOK_TO_TEXI" = yes; then if sgml2xml -v /dev/null 2>&1 | grep 'SP version' >/dev/null 2>&1 ; then working_sgmltotexi=yes fi fi AC_MSG_RESULT($working_sgmltotexi) AM_CONDITIONAL(HAVE_DOCBOOK_TO_TEXI, test "$working_sgmltotexi" = "yes" ) ]) dnl GNUPG_CHECK_ENDIAN dnl define either LITTLE_ENDIAN_HOST or BIG_ENDIAN_HOST dnl define([GNUPG_CHECK_ENDIAN], [ tmp_assumed_endian=big if test "$cross_compiling" = yes; then case "$host_cpu" in i@<:@345678@:>@* ) tmp_assumed_endian=little ;; *) ;; esac AC_MSG_WARN(cross compiling; assuming $tmp_assumed_endian endianess) fi AC_MSG_CHECKING(endianess) AC_CACHE_VAL(gnupg_cv_c_endian, [ gnupg_cv_c_endian=unknown # See if sys/param.h defines the BYTE_ORDER macro. AC_TRY_COMPILE([#include #include ], [ #if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN bogus endian macros #endif], [# It does; now see whether it defined to BIG_ENDIAN or not. AC_TRY_COMPILE([#include #include ], [ #if BYTE_ORDER != BIG_ENDIAN not big endian #endif], gnupg_cv_c_endian=big, gnupg_cv_c_endian=little)]) if test "$gnupg_cv_c_endian" = unknown; then AC_TRY_RUN([main () { /* Are we little or big endian? From Harbison&Steele. */ union { long l; char c[sizeof (long)]; } u; u.l = 1; exit (u.c[sizeof (long) - 1] == 1); }], gnupg_cv_c_endian=little, gnupg_cv_c_endian=big, gnupg_cv_c_endian=$tmp_assumed_endian ) fi ]) AC_MSG_RESULT([$gnupg_cv_c_endian]) if test "$gnupg_cv_c_endian" = little; then AC_DEFINE(LITTLE_ENDIAN_HOST,1, [Defined if the host has little endian byte ordering]) else AC_DEFINE(BIG_ENDIAN_HOST,1, [Defined if the host has big endian byte ordering]) fi ]) dnl GNUPG_CHECK_CACHE dnl define(GNUPG_CHECK_CACHE, [ AC_MSG_CHECKING(cached information) gnupg_hostcheck="$target" AC_CACHE_VAL(gnupg_cv_hostcheck, [ gnupg_cv_hostcheck="$gnupg_hostcheck" ]) if test "$gnupg_cv_hostcheck" != "$gnupg_hostcheck"; then AC_MSG_RESULT(changed) AC_MSG_WARN(config.cache exists!) AC_MSG_ERROR(you must do 'make distclean' first to compile for different target or different parameters.) else AC_MSG_RESULT(ok) fi ]) ###################################################################### # Check for -fPIC etc (taken from libtool) # This sets CFLAGS_PIC to the required flags # NO_PIC to yes if it is not possible to # generate PIC ###################################################################### dnl GNUPG_CHECK_PIC dnl define(GNUPG_CHECK_PIC, [ AC_MSG_CHECKING(for option to create PIC) CFLAGS_PIC= NO_PIC=no if test "$cross_compiling" = yes; then AC_MSG_RESULT(assume none) else if test "$GCC" = yes; then CFLAGS_PIC="-fPIC" else case "$host_os" in aix3* | aix4*) # All rs/6000 code is PIC # but is there any non-rs/6000 AIX platform? ;; hpux9* | hpux10*) CFLAGS_PIC="+Z" ;; irix5* | irix6*) # PIC (with -KPIC) is the default. ;; osf3* | osf4*) # FIXME - pic_flag is probably required for # hppa*-osf* and i860-osf* ;; sco3.2v5*) CFLAGS_PIC='-Kpic' ;; solaris2* | solaris7* ) CFLAGS_PIC='-KPIC' ;; sunos4*) CFLAGS_PIC='-PIC' ;; *) NO_PIC=yes ;; esac fi case "$host_cpu" in rs6000 | powerpc | powerpcle) # Yippee! All RS/6000 and PowerPC code is position-independent. CFLAGS_PIC="" ;; esac if test "$NO_PIC" = yes; then AC_MSG_RESULT(not possible) else if test -z "$CFLAGS_PIC"; then AC_MSG_RESULT(none) else AC_MSG_RESULT($CFLAGS_PIC) fi fi fi ]) ###################################################################### # Check for export-dynamic flag # This sets CFLAGS_EXPORTDYNAMIC to the required flags ###################################################################### dnl GNUPG_CHECK_EXPORTDYNAMIC dnl define(GNUPG_CHECK_EXPORTDYNAMIC, [ AC_MSG_CHECKING(how to specify -export-dynamic) if test "$cross_compiling" = yes; then AC_MSG_RESULT(assume none) CFLAGS_EXPORTDYNAMIC="" else AC_CACHE_VAL(gnupg_cv_export_dynamic,[ if AC_TRY_COMMAND([${CC-cc} $CFLAGS -Wl,--version 2>&1 | grep "GNU ld" >/dev/null]); then # using gnu's linker gnupg_cv_export_dynamic="-Wl,-export-dynamic" else case "$host_os" in hpux* ) gnupg_cv_export_dynamic="-Wl,-E" ;; * ) gnupg_cv_export_dynamic="" ;; esac fi ]) AC_MSG_RESULT($gnupg_cv_export_dynamic) CFLAGS_EXPORTDYNAMIC="$gnupg_cv_export_dynamic" fi ]) ##################################################################### # Check for SysV IPC (from GIMP) # And see whether we have a SHM_LOCK (FreeBSD does not have it). ##################################################################### dnl GNUPG_CHECK_IPC dnl define(GNUPG_CHECK_IPC, [ AC_CHECK_HEADERS(sys/ipc.h sys/shm.h) if test "$ac_cv_header_sys_shm_h" = "yes"; then AC_MSG_CHECKING(whether IPC_RMID allowes subsequent attaches) AC_CACHE_VAL(gnupg_cv_ipc_rmid_deferred_release, AC_TRY_RUN([ #include #include #include int main() { int id; char *shmaddr; id = shmget (IPC_PRIVATE, 4, IPC_CREAT | 0777); if (id == -1) exit (2); shmaddr = shmat (id, 0, 0); shmctl (id, IPC_RMID, 0); if ((char*) shmat (id, 0, 0) == (char*) -1) { shmdt (shmaddr); exit (1); } shmdt (shmaddr); shmdt (shmaddr); exit (0); } ], gnupg_cv_ipc_rmid_deferred_release="yes", gnupg_cv_ipc_rmid_deferred_release="no", gnupg_cv_ipc_rmid_deferred_release="assume-no") ) if test "$gnupg_cv_ipc_rmid_deferred_release" = "yes"; then AC_DEFINE(IPC_RMID_DEFERRED_RELEASE,1, [Defined if we can do a deferred shm release]) AC_MSG_RESULT(yes) else if test "$gnupg_cv_ipc_rmid_deferred_release" = "no"; then AC_MSG_RESULT(no) else AC_MSG_RESULT([assuming no]) fi fi AC_MSG_CHECKING(whether SHM_LOCK is available) AC_CACHE_VAL(gnupg_cv_ipc_have_shm_lock, AC_TRY_COMPILE([#include #include #include ],[ int shm_id; shmctl(shm_id, SHM_LOCK, 0); ], gnupg_cv_ipc_have_shm_lock="yes", gnupg_cv_ipc_have_shm_lock="no" ) ) if test "$gnupg_cv_ipc_have_shm_lock" = "yes"; then AC_DEFINE(IPC_HAVE_SHM_LOCK,1, [Defined if a SysV shared memory supports the LOCK flag]) AC_MSG_RESULT(yes) else AC_MSG_RESULT(no) fi fi ]) ###################################################################### # Check whether mlock is broken (hpux 10.20 raises a SIGBUS if mlock # is not called from uid 0 (not tested whether uid 0 works) # For DECs Tru64 we have also to check whether mlock is in librt # mlock is there a macro using memlk() ###################################################################### dnl GNUPG_CHECK_MLOCK dnl define(GNUPG_CHECK_MLOCK, [ AC_CHECK_FUNCS(mlock) if test "$ac_cv_func_mlock" = "no"; then AC_CHECK_HEADERS(sys/mman.h) if test "$ac_cv_header_sys_mman_h" = "yes"; then # Add librt to LIBS: AC_CHECK_LIB(rt, memlk) AC_CACHE_CHECK([whether mlock is in sys/mman.h], gnupg_cv_mlock_is_in_sys_mman, [AC_TRY_LINK([ #include #ifdef HAVE_SYS_MMAN_H #include #endif ], [ int i; /* glibc defines this for functions which it implements * to always fail with ENOSYS. Some functions are actually * named something starting with __ and the normal name * is an alias. */ #if defined (__stub_mlock) || defined (__stub___mlock) choke me #else mlock(&i, 4); #endif ; return 0; ], gnupg_cv_mlock_is_in_sys_mman=yes, gnupg_cv_mlock_is_in_sys_mman=no)]) if test "$gnupg_cv_mlock_is_in_sys_mman" = "yes"; then AC_DEFINE(HAVE_MLOCK,1, [Defined if the system supports an mlock() call]) fi fi fi if test "$ac_cv_func_mlock" = "yes"; then AC_MSG_CHECKING(whether mlock is broken) AC_CACHE_VAL(gnupg_cv_have_broken_mlock, AC_TRY_RUN([ #include #include #include #include #include #include int main() { char *pool; int err; long int pgsize; #if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE) pgsize = sysconf(_SC_PAGESIZE); #elif defined(HAVE_GETPAGESIZE) pgsize = getpagesize(); #endif if(pgsize==-1) pgsize = 4096; pool = malloc( 4096 + pgsize ); if( !pool ) return 2; pool += (pgsize - ((long int)pool % pgsize)); err = mlock( pool, 4096 ); if( !err || errno == EPERM ) return 0; /* okay */ return 1; /* hmmm */ } ], gnupg_cv_have_broken_mlock="no", gnupg_cv_have_broken_mlock="yes", gnupg_cv_have_broken_mlock="assume-no" ) ) if test "$gnupg_cv_have_broken_mlock" = "yes"; then AC_DEFINE(HAVE_BROKEN_MLOCK,1, [Defined if the mlock() call does not work]) AC_MSG_RESULT(yes) AC_CHECK_FUNCS(plock) else if test "$gnupg_cv_have_broken_mlock" = "no"; then AC_MSG_RESULT(no) else AC_MSG_RESULT(assuming no) fi fi fi ]) ################################################################ # GNUPG_PROG_NM - find the path to a BSD-compatible name lister AC_DEFUN([GNUPG_PROG_NM], [AC_MSG_CHECKING([for BSD-compatible nm]) AC_CACHE_VAL(ac_cv_path_NM, [if test -n "$NM"; then # Let the user override the test. ac_cv_path_NM="$NM" else IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:" for ac_dir in /usr/ucb /usr/ccs/bin $PATH /bin; do test -z "$ac_dir" && ac_dir=. if test -f $ac_dir/nm; then # Check to see if the nm accepts a BSD-compat flag. # Adding the `sed 1q' prevents false positives on HP-UX, which says: # nm: unknown option "B" ignored if ($ac_dir/nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then ac_cv_path_NM="$ac_dir/nm -B" elif ($ac_dir/nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then ac_cv_path_NM="$ac_dir/nm -p" else ac_cv_path_NM="$ac_dir/nm" fi break fi done IFS="$ac_save_ifs" test -z "$ac_cv_path_NM" && ac_cv_path_NM=nm fi]) NM="$ac_cv_path_NM" AC_MSG_RESULT([$NM]) AC_SUBST(NM) ]) # GNUPG_SYS_NM_PARSE - Check for command ro grab the raw symbol name followed # by C symbol name from nm. AC_DEFUN([GNUPG_SYS_NM_PARSE], [AC_REQUIRE([AC_CANONICAL_HOST])dnl AC_REQUIRE([GNUPG_PROG_NM])dnl # Check for command to grab the raw symbol name followed by C symbol from nm. AC_MSG_CHECKING([command to parse $NM output]) AC_CACHE_VAL(ac_cv_sys_global_symbol_pipe, [# These are sane defaults that work on at least a few old systems. # {They come from Ultrix. What could be older than Ultrix?!! ;)} changequote(,)dnl # Character class describing NM global symbol codes. ac_symcode='[BCDEGRSTU]' # Regexp to match symbols that can be accessed directly from C. ac_sympat='\([_A-Za-z][_A-Za-z0-9]*\)' # Transform the above into a raw symbol and a C symbol. ac_symxfrm='\1 \1' # Define system-specific variables. case "$host_os" in aix*) ac_symcode='[BCDTU]' ;; freebsd* | netbsd* | openbsd* | bsdi* | sunos* | cygwin32* | mingw32*) ac_sympat='_\([_A-Za-z][_A-Za-z0-9]*\)' ac_symxfrm='_\1 \1' ;; irix*) # Cannot use undefined symbols on IRIX because inlined functions mess us up. ac_symcode='[BCDEGRST]' ;; solaris*) ac_symcode='[BDTU]' ;; esac # If we're using GNU nm, then use its standard symbol codes. if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then ac_symcode='[ABCDGISTUW]' fi case "$host_os" in cygwin32* | mingw32*) # We do not want undefined symbols on cygwin32. The user must # arrange to define them via -l arguments. ac_symcode='[ABCDGISTW]' ;; esac changequote([,])dnl # Write the raw and C identifiers. ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.* $ac_symcode $ac_sympat$/$ac_symxfrm/p'" # Check to see that the pipe works correctly. ac_pipe_works=no cat > conftest.$ac_ext < $ac_nlist) && test -s "$ac_nlist"; then # Try sorting and uniquifying the output. if sort "$ac_nlist" | uniq > "$ac_nlist"T; then mv -f "$ac_nlist"T "$ac_nlist" ac_wcout=`wc "$ac_nlist" 2>/dev/null` changequote(,)dnl ac_count=`echo "X$ac_wcout" | sed -e 's,^X,,' -e 's/^[ ]*\([0-9][0-9]*\).*$/\1/'` changequote([,])dnl (test "$ac_count" -ge 0) 2>/dev/null || ac_count=-1 else rm -f "$ac_nlist"T ac_count=-1 fi # Make sure that we snagged all the symbols we need. if egrep ' _?nm_test_var$' "$ac_nlist" >/dev/null; then if egrep ' _?nm_test_func$' "$ac_nlist" >/dev/null; then cat < conftest.c #ifdef __cplusplus extern "C" { #endif EOF # Now generate the symbol file. sed 's/^.* _\{0,1\}\(.*\)$/extern char \1;/' < "$ac_nlist" >> conftest.c cat <> conftest.c #if defined (__STDC__) && __STDC__ # define __ptr_t void * #else # define __ptr_t char * #endif /* The number of symbols in dld_preloaded_symbols, -1 if unsorted. */ int dld_preloaded_symbol_count = $ac_count; /* The mapping between symbol names and symbols. */ struct { char *name; __ptr_t address; } changequote(,)dnl dld_preloaded_symbols[] = changequote([,])dnl { EOF sed 's/^_\{0,1\}\(.*\) _\{0,1\}\(.*\)$/ {"\1", (__ptr_t) \&\2},/' < "$ac_nlist" >> conftest.c cat <<\EOF >> conftest.c {0, (__ptr_t) 0} }; #ifdef __cplusplus } #endif EOF # Now try linking the two files. mv conftest.$ac_objext conftestm.$ac_objext ac_save_LIBS="$LIBS" ac_save_CFLAGS="$CFLAGS" LIBS="conftestm.$ac_objext" CFLAGS="$CFLAGS$no_builtin_flag" if AC_TRY_EVAL(ac_link) && test -s conftest; then ac_pipe_works=yes else echo "configure: failed program was:" >&AC_FD_CC cat conftest.c >&AC_FD_CC fi LIBS="$ac_save_LIBS" CFLAGS="$ac_save_CFLAGS" else echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC fi else echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC fi else echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC fi else echo "$progname: failed program was:" >&AC_FD_CC cat conftest.c >&AC_FD_CC fi rm -rf conftest* # Do not use the global_symbol_pipe unless it works. test "$ac_pipe_works" = yes || ac_cv_sys_global_symbol_pipe= ]) ac_result=yes if test -z "$ac_cv_sys_global_symbol_pipe"; then ac_result=no fi AC_MSG_RESULT($ac_result) ]) # GNUPG_SYS_LIBTOOL_CYGWIN32 - find tools needed on cygwin32 AC_DEFUN([GNUPG_SYS_LIBTOOL_CYGWIN32], [AC_CHECK_TOOL(DLLTOOL, dlltool, false) AC_CHECK_TOOL(AS, as, false) ]) # GNUPG_SYS_SYMBOL_UNDERSCORE - does the compiler prefix global symbols # with an underscore? AC_DEFUN([GNUPG_SYS_SYMBOL_UNDERSCORE], [tmp_do_check="no" case "${host}" in *-mingw32msvc*) ac_cv_sys_symbol_underscore=yes ;; i386-emx-os2 | i[3456]86-pc-os2*emx | i386-pc-msdosdjgpp) ac_cv_sys_symbol_underscore=yes ;; *) if test "$cross_compiling" = yes; then if test "x$ac_cv_sys_symbol_underscore" = x; then ac_cv_sys_symbol_underscore=yes fi else tmp_do_check="yes" fi ;; esac if test "$tmp_do_check" = "yes"; then AC_REQUIRE([GNUPG_PROG_NM])dnl AC_REQUIRE([GNUPG_SYS_NM_PARSE])dnl AC_MSG_CHECKING([for _ prefix in compiled symbols]) AC_CACHE_VAL(ac_cv_sys_symbol_underscore, [ac_cv_sys_symbol_underscore=no cat > conftest.$ac_ext < $ac_nlist) && test -s "$ac_nlist"; then # See whether the symbols have a leading underscore. if egrep '^_nm_test_func' "$ac_nlist" >/dev/null; then ac_cv_sys_symbol_underscore=yes else if egrep '^nm_test_func ' "$ac_nlist" >/dev/null; then : else echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC fi fi else echo "configure: cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC fi else echo "configure: failed program was:" >&AC_FD_CC cat conftest.c >&AC_FD_CC fi rm -rf conftest* ]) else AC_MSG_CHECKING([for _ prefix in compiled symbols]) fi AC_MSG_RESULT($ac_cv_sys_symbol_underscore) if test x$ac_cv_sys_symbol_underscore = xyes; then AC_DEFINE(WITH_SYMBOL_UNDERSCORE,1, [Defined if compiled symbols have a leading underscore]) fi ]) dnl Stolen from gcc dnl Define MKDIR_TAKES_ONE_ARG if mkdir accepts only one argument instead dnl of the usual 2. AC_DEFUN([GNUPG_FUNC_MKDIR_TAKES_ONE_ARG], [AC_CHECK_HEADERS(sys/stat.h unistd.h direct.h) AC_CACHE_CHECK([if mkdir takes one argument], gnupg_cv_mkdir_takes_one_arg, [AC_TRY_COMPILE([ #include #ifdef HAVE_SYS_STAT_H # include #endif #ifdef HAVE_UNISTD_H # include #endif #ifdef HAVE_DIRECT_H # include #endif], [mkdir ("foo", 0);], gnupg_cv_mkdir_takes_one_arg=no, gnupg_cv_mkdir_takes_one_arg=yes)]) if test $gnupg_cv_mkdir_takes_one_arg = yes ; then AC_DEFINE(MKDIR_TAKES_ONE_ARG,1, [Defined if mkdir() does not take permission flags]) fi ]) # GNUPG_AC_INIT([PACKAGE, VERSION, [ISDEVEL], BUG-REPORT) # ---------------------------------------- # Call AC_INIT with an additional argument to indicate a development # version. If this is called ""svn", the global revision of the # repository will be appended, so that a version. The variable # SVN_REVISION will always be set. In case svn is not available 0 # will be used for the revision. m4_define([GNUPG_AC_INIT], [ m4_define(gnupg_ac_init_tmp, m4_esyscmd([echo -n $((svn info 2>/dev/null || \ echo 'Revision: 0') |sed -n '/^Revision:/ {s/[^0-9]//gp;q}')])) SVN_REVISION="gnupg_ac_init_tmp[]" AC_INIT([$1], [$2][]m4_ifval([$3],[-[$3][]gnupg_ac_init_tmp],[]), [$4]) ])