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106 lines
2.9 KiB
Plaintext
106 lines
2.9 KiB
Plaintext
dnl AC_VALIDATE_CACHE_SYSTEM_TYPE[(cmd)]
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dnl if the cache file is inconsistent with the current host,
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dnl target and build system types, execute CMD or print a default
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dnl error message.
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AC_DEFUN(AC_VALIDATE_CACHE_SYSTEM_TYPE, [
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AC_REQUIRE([AC_CANONICAL_SYSTEM])
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AC_MSG_CHECKING([config.cache system type])
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if { test x"${ac_cv_host_system_type+set}" = x"set" &&
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test x"$ac_cv_host_system_type" != x"$host"; } ||
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{ test x"${ac_cv_build_system_type+set}" = x"set" &&
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test x"$ac_cv_build_system_type" != x"$build"; } ||
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{ test x"${ac_cv_target_system_type+set}" = x"set" &&
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test x"$ac_cv_target_system_type" != x"$target"; }; then
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AC_MSG_RESULT([different])
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ifelse($#, 1, [$1],
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[AC_MSG_ERROR(["you must remove config.cache and restart configure"])])
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else
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AC_MSG_RESULT([same])
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fi
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ac_cv_host_system_type="$host"
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ac_cv_build_system_type="$build"
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ac_cv_target_system_type="$target"
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])
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dnl test whether dirent has a d_off member
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AC_DEFUN(AC_DIRENT_D_OFF,
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[AC_CACHE_CHECK([for d_off in dirent], ac_cv_dirent_d_off,
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[AC_TRY_COMPILE([
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#include <unistd.h>
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#include <sys/types.h>
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#include <dirent.h>], [struct dirent d; d.d_off;],
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ac_cv_dirent_d_off=yes, ac_cv_dirent_d_off=no)])
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if test $ac_cv_dirent_d_off = yes; then
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AC_DEFINE(HAVE_DIRENT_D_OFF)
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fi
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])
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dnl AC_PROG_CC_FLAG(flag)
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AC_DEFUN(AC_PROG_CC_FLAG,
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[AC_CACHE_CHECK(whether ${CC-cc} accepts -$1, ac_cv_prog_cc_$1,
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[echo 'void f(){}' > conftest.c
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if test -z "`${CC-cc} -$1 -c conftest.c 2>&1`"; then
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ac_cv_prog_cc_$1=yes
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else
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ac_cv_prog_cc_$1=no
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fi
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rm -f conftest*
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])])
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dnl see if a declaration exists for a function or variable
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dnl defines HAVE_function_DECL if it exists
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dnl AC_HAVE_DECL(var, includes)
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AC_DEFUN(AC_HAVE_DECL,
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[
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AC_CACHE_CHECK([for $1 declaration],ac_cv_have_$1_decl,[
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AC_TRY_COMPILE([$2],[int i = (int)$1],
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ac_cv_have_$1_decl=yes,ac_cv_have_$1_decl=no)])
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if test x"$ac_cv_have_$1_decl" = x"yes"; then
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AC_DEFINE([HAVE_]translit([$1], [a-z], [A-Z])[_DECL])
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fi
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])
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dnl check for a function in a library, but don't
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dnl keep adding the same library to the LIBS variable.
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dnl AC_LIBTESTFUNC(lib,func)
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AC_DEFUN(AC_LIBTESTFUNC,
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[case "$LIBS" in
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*-l$1*) AC_CHECK_FUNCS($2) ;;
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*) AC_CHECK_LIB($1, $2)
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AC_CHECK_FUNCS($2)
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;;
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esac
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])
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dnl Define an AC_DEFINE with ifndef guard.
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dnl AC_N_DEFINE(VARIABLE [, VALUE])
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define(AC_N_DEFINE,
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[cat >> confdefs.h <<\EOF
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[#ifndef] $1
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[#define] $1 ifelse($#, 2, [$2], $#, 3, [$2], 1)
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[#endif]
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EOF
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])
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dnl Add an #include
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dnl AC_ADD_INCLUDE(VARIABLE)
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define(AC_ADD_INCLUDE,
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[cat >> confdefs.h <<\EOF
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[#include] $1
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EOF
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])
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dnl Copied from libtool.m4
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AC_DEFUN(AC_PROG_LD_GNU,
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[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
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[# I'd rather use --version here, but apparently some GNU ld's only accept -v.
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if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
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ac_cv_prog_gnu_ld=yes
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else
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ac_cv_prog_gnu_ld=no
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fi])
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])
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