Edit
thodg/libiconv/m4/general.m4
Bruno Haible
- m4/general.m4
-
dnl Copyright (C) 1993-2002 Free Software Foundation, Inc. dnl This file is free software, distributed under the terms of the GNU dnl General Public License. As a special exception to the GNU General dnl Public License, this file may be distributed as part of a program dnl that contains a configuration script generated by Autoconf, under dnl the same distribution terms as the rest of that program. dnl From Bruno Haible, Marcus Daniels, Sam Steingold. AC_PREREQ(2.13) dnl without AC_MSG_...: with AC_MSG_... and caching: dnl AC_TRY_CPP CL_CPP_CHECK dnl AC_TRY_COMPILE CL_COMPILE_CHECK dnl AC_TRY_LINK CL_LINK_CHECK dnl AC_TRY_RUN CL_RUN_CHECK - would require cross-compiling support dnl Usage: dnl AC_TRY_CPP(INCLUDES, dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]) dnl CL_CPP_CHECK(ECHO-TEXT, CACHE-ID, dnl INCLUDES, dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]) dnl AC_TRY_xxx(INCLUDES, FUNCTION-BODY, dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]) dnl CL_xxx_CHECK(ECHO-TEXT, CACHE-ID, dnl INCLUDES, FUNCTION-BODY, dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]) AC_DEFUN([CL_CPP_CHECK], [AC_MSG_CHECKING(for $1) AC_CACHE_VAL($2,[ AC_TRY_CPP([$3], $2=yes, $2=no) ]) AC_MSG_RESULT([$]$2) if test [$]$2 = yes; then ifelse([$4], , :, [$4]) ifelse([$5], , , [else $5 ])dnl fi ]) AC_DEFUN([CL_COMPILE_CHECK], [AC_MSG_CHECKING(for $1) AC_CACHE_VAL($2,[ AC_TRY_COMPILE([$3],[$4], $2=yes, $2=no) ]) AC_MSG_RESULT([$]$2) if test [$]$2 = yes; then ifelse([$5], , :, [$5]) ifelse([$6], , , [else $6 ])dnl fi ]) AC_DEFUN([CL_LINK_CHECK], [AC_MSG_CHECKING(for $1) AC_CACHE_VAL($2,[ AC_TRY_LINK([$3],[$4], $2=yes, $2=no) ]) AC_MSG_RESULT([$]$2) if test [$]$2 = yes; then ifelse([$5], , :, [$5]) ifelse([$6], , , [else $6 ])dnl fi ]) dnl CL_SILENT(ACTION) dnl performs ACTION, with AC_MSG_CHECKING and AC_MSG_RESULT being defined away. AC_DEFUN([CL_SILENT], [pushdef([AC_MSG_CHECKING],[:])dnl pushdef([AC_CHECKING],[:])dnl pushdef([AC_MSG_RESULT],[:])dnl $1[]dnl popdef([AC_MSG_RESULT])dnl popdef([AC_CHECKING])dnl popdef([AC_MSG_CHECKING])dnl ]) dnl Expands to the "extern ..." prefix used for system declarations. dnl AC_LANG_EXTERN() AC_DEFUN([AC_LANG_EXTERN], [extern #ifdef __cplusplus "C" #endif ]) AC_DEFUN([CL_CC_WORKS], [AC_CACHE_CHECK(whether CC works at all, cl_cv_prog_cc_works, [ AC_LANG_SAVE() AC_LANG_C() AC_TRY_RUN([int main() { exit(0); }], cl_cv_prog_cc_works=yes, cl_cv_prog_cc_works=no, AC_TRY_LINK([], [], cl_cv_prog_cc_works=yes, cl_cv_prog_cc_works=no)) AC_LANG_RESTORE() ]) case "$cl_cv_prog_cc_works" in *no) echo "Installation or configuration problem: C compiler cannot create executables."; exit 1;; *yes) ;; esac ]) AC_DEFUN([CL_CONFIG_SUBDIRS], [dnl No AC_CONFIG_AUX_DIR_DEFAULT, so we don't need install.sh. AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT]) AC_CONFIG_SUBDIRS([$1])dnl ]) AC_DEFUN([CL_CANONICAL_HOST], [AC_REQUIRE([AC_PROG_CC]) dnl Actually: AC_REQUIRE([CL_CC_WORKS]) dnl Set ac_aux_dir before the cache check, because AM_PROG_LIBTOOL needs it. ac_aux_dir=${srcdir}/$1 dnl A substitute for AC_CONFIG_AUX_DIR_DEFAULT, so we don't need install.sh. ac_config_guess="$SHELL $ac_aux_dir/config.guess" ac_config_sub="$SHELL $ac_aux_dir/config.sub" dnl We have defined $ac_aux_dir. AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl dnl In autoconf-2.52, a single AC_CANONICAL_HOST has the effect of inserting dnl the code of AC_CANONICAL_BUILD *before* CL_CANONICAL_HOST, i.e. before dnl ac_aux_dir has been set. To work around this, we list AC_CANONICAL_BUILD dnl explicitly. AC_CANONICAL_BUILD AC_CANONICAL_HOST ]) AC_DEFUN([CL_CANONICAL_HOST_CPU], [AC_REQUIRE([CL_CANONICAL_HOST])AC_REQUIRE([AC_PROG_CC]) case "$host_cpu" in changequote(,)dnl i[4567]86 ) host_cpu=i386 ;; alphaev[4-7] | alphaev56 | alphapca5[67] | alphaev6[78] ) host_cpu=alpha ;; hppa1.0 | hppa1.1 | hppa2.0* ) host_cpu=hppa ;; powerpc ) host_cpu=rs6000 ;; c1 | c2 | c32 | c34 | c38 | c4 ) host_cpu=convex ;; arm* ) host_cpu=arm ;; changequote([,])dnl mips ) AC_CACHE_CHECK([for 64-bit MIPS], cl_cv_host_mips64, [ AC_EGREP_CPP(yes, [#if defined(_MIPS_SZLONG) #if (_MIPS_SZLONG == 64) /* We should also check for (_MIPS_SZPTR == 64), but gcc keeps this at 32. */ yes #endif #endif ], cl_cv_host_mips64=yes, cl_cv_host_mips64=no) ]) if test $cl_cv_host_mips64 = yes; then host_cpu=mips64 fi ;; dnl UltraSPARCs running Linux have `uname -m` = "sparc64", but the C compiler dnl still generates 32-bit code. sparc | sparc64 ) AC_CACHE_CHECK([for 64-bit SPARC], cl_cv_host_sparc64, [ AC_EGREP_CPP(yes, [#if defined(__sparcv9) || defined(__arch64__) yes #endif ], cl_cv_host_sparc64=yes, cl_cv_host_sparc64=no) ]) if test $cl_cv_host_sparc64 = yes; then host_cpu=sparc64 else host_cpu=sparc fi ;; esac dnl was AC_DEFINE_UNQUOTED(__${host_cpu}__) but KAI C++ 3.2d doesn't like this cat >> confdefs.h <<EOF #ifndef __${host_cpu}__ #define __${host_cpu}__ 1 #endif EOF ]) AC_DEFUN([CL_CANONICAL_HOST_CPU_FOR_FFCALL], [AC_REQUIRE([CL_CANONICAL_HOST])AC_REQUIRE([AC_PROG_CC]) case "$host_cpu" in changequote(,)dnl i[4567]86 ) host_cpu=i386 ;; alphaev[4-7] | alphaev56 | alphapca5[67] | alphaev6[78] ) host_cpu=alpha ;; hppa1.0 | hppa1.1 | hppa2.0* ) host_cpu=hppa ;; powerpc ) host_cpu=rs6000 ;; c1 | c2 | c32 | c34 | c38 | c4 ) host_cpu=convex ;; arm* ) host_cpu=arm ;; changequote([,])dnl mips ) AC_CACHE_CHECK([for 64-bit MIPS], cl_cv_host_mips64, [ AC_EGREP_CPP(yes, [#if defined(_MIPS_SZLONG) #if (_MIPS_SZLONG == 64) /* We should also check for (_MIPS_SZPTR == 64), but gcc keeps this at 32. */ yes #endif #endif ], cl_cv_host_mips64=yes, cl_cv_host_mips64=no) ]) if test $cl_cv_host_mips64 = yes; then host_cpu=mips64 else AC_CACHE_CHECK([for MIPS with n32 ABI], cl_cv_host_mipsn32, [ dnl Strictly speaking, the MIPS ABI (-32 or -n32) is independent from the CPU dnl identification (-mips[12] or -mips[34]). But -n32 is commonly used together dnl with -mips3, and it's easier to test the CPU identification. AC_EGREP_CPP(yes, [#if __mips >= 3 yes #endif ], cl_cv_host_mipsn32=yes, cl_cv_host_mipsn32=no) ]) if test $cl_cv_host_mipsn32 = yes; then host_cpu=mipsn32 fi fi ;; dnl UltraSPARCs running Linux have `uname -m` = "sparc64", but the C compiler dnl still generates 32-bit code. sparc | sparc64 ) AC_CACHE_CHECK([for 64-bit SPARC], cl_cv_host_sparc64, [ AC_EGREP_CPP(yes, [#if defined(__sparcv9) || defined(__arch64__) yes #endif ], cl_cv_host_sparc64=yes, cl_cv_host_sparc64=no) ]) if test $cl_cv_host_sparc64 = yes; then host_cpu=sparc64 else host_cpu=sparc fi ;; esac dnl was AC_DEFINE_UNQUOTED(__${host_cpu}__) but KAI C++ 3.2d doesn't like this cat >> confdefs.h <<EOF #ifndef __${host_cpu}__ #define __${host_cpu}__ 1 #endif EOF ])