+sinclude(../config/accross.m4)
+
dnl See if stdbool.h properly defines bool and true/false.
AC_DEFUN(gcc_AC_HEADER_STDBOOL,
[AC_CACHE_CHECK([for working stdbool.h],
EOF
gcc_cv_prog_adac=no
# Have to do ac_tool_prefix and user overrides by hand.
-user_adac=$ADAC
-user_cc=$CC
-for cand in ${ac_tool_prefix}$user_adac $user_adac \
- ${ac_tool_prefix}$user_cc $user_cc \
+for cand in ${ADAC+"$ADAC"} ${CC+"$CC"} \
${ac_tool_prefix}gcc gcc \
${ac_tool_prefix}cc cc \
${ac_tool_prefix}gnatgcc gnatgcc \
then ac_cv_func_mmap_dev_zero=no
else ac_cv_func_mmap_dev_zero=buggy
fi],
- # If this is not cygwin, and /dev/zero is a character device, it's probably
- # safe to assume it works.
+ # When cross-building, assume that this works, unless we know it
+ # doesn't. Of course, we have no way of knowing if there even is a /dev/zero
+ # on the host, let alone whether mmap will work on it.
[case "$host_os" in
cygwin* | win32 | pe | mingw* ) ac_cv_func_mmap_dev_zero=buggy ;;
- * ) if test -c /dev/zero
- then ac_cv_func_mmap_dev_zero=yes
- else ac_cv_func_mmap_dev_zero=no
- fi ;;
+ darwin* ) ac_cv_func_mmap_dev_zero=no ;;
+ * ) ac_cv_func_mmap_dev_zero=yes ;;
esac])
])
if test $ac_cv_func_mmap_dev_zero = yes; then
fi],
# Unlike /dev/zero, it is not safe to assume MAP_ANON(YMOUS) works
# just because it's there. Some SCO Un*xen define it but don't implement it.
- ac_cv_func_mmap_anon=no)
+ [case "$host_os" in
+ darwin* ) ac_cv_func_mmap_anon=yes ;;
+ * ) ac_cv_func_mmap_anon=no ;;
+ esac])
])
if test $ac_cv_func_mmap_anon = yes; then
AC_DEFINE(HAVE_MMAP_ANON, 1,
exit(0);
}], ac_cv_func_mmap_file=yes, ac_cv_func_mmap_file=no,
-ac_cv_func_mmap_file=no)])
+ [case "$host_os" in
+ darwin* ) ac_cv_func_mmap_file=yes ;;
+ * ) ac_cv_func_mmap_file=no ;;
+ esac])])
if test $ac_cv_func_mmap_file = yes; then
AC_DEFINE(HAVE_MMAP_FILE, 1,
[Define if read-only mmap of a plain file works.])
[Define if enumerated bitfields are treated as unsigned values.])
fi])
-dnl Host type sizes probe.
-dnl By Kaveh R. Ghazi. One typo fixed since.
-dnl
-AC_DEFUN([gcc_AC_COMPILE_CHECK_SIZEOF],
-[changequote(<<, >>)dnl
-dnl The name to #define.
-define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
-dnl The cache variable name.
-define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
-changequote([, ])dnl
-AC_MSG_CHECKING(size of $1)
-AC_CACHE_VAL(AC_CV_NAME,
-[for ac_size in 4 8 1 2 16 $3 ; do # List sizes in rough order of prevalence.
- AC_TRY_COMPILE([#include "confdefs.h"
-#include <sys/types.h>
-$2
-], [switch (0) case 0: case (sizeof ($1) == $ac_size):;], AC_CV_NAME=$ac_size)
- if test x$AC_CV_NAME != x ; then break; fi
-done
-])
-if test x$AC_CV_NAME = x ; then
- AC_MSG_ERROR([cannot determine a size for $1])
-fi
-AC_MSG_RESULT($AC_CV_NAME)
-AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [The number of bytes in type $1])
-undefine([AC_TYPE_NAME])dnl
-undefine([AC_CV_NAME])dnl
-])
-
dnl Probe number of bits in a byte.
dnl Note C89 requires CHAR_BIT >= 8.
dnl
rm -rf conftest*
AC_LANG_RESTORE])
-dnl Host endianness probe.
-dnl This tests byte-within-word endianness. GCC actually needs
-dnl to know word-within-larger-object endianness. They are the
-dnl same on all presently supported hosts.
-dnl Differs from AC_C_BIGENDIAN in that it does not require
-dnl running a program on the host, and it defines the macro we
-dnl want to see.
-dnl
-AC_DEFUN([gcc_AC_C_COMPILE_ENDIAN],
-[AC_CACHE_CHECK(byte ordering, ac_cv_c_compile_endian,
-[ac_cv_c_compile_endian=unknown
-gcc_AC_EXAMINE_OBJECT([
-#ifdef HAVE_LIMITS_H
-# include <limits.h>
-#endif
-/* This structure must have no internal padding. */
- struct {
- char prefix[sizeof "\nendian:" - 1];
- short word;
- char postfix[2];
- } tester = {
- "\nendian:",
-#if SIZEOF_SHORT == 4
- ('A' << (CHAR_BIT * 3)) | ('B' << (CHAR_BIT * 2)) |
-#endif
- ('A' << CHAR_BIT) | 'B',
- 'X', '\n'
-};],
- [if grep 'endian:AB' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_compile_endian=big-endian
- elif grep 'endian:BA' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_compile_endian=little-endian
- fi])
-])
-if test $ac_cv_c_compile_endian = unknown; then
- AC_MSG_ERROR([*** unable to determine endianness])
-elif test $ac_cv_c_compile_endian = big-endian; then
- AC_DEFINE(HOST_WORDS_BIG_ENDIAN, 1,
- [Define if the host machine stores words of multi-word integers in
- big-endian order.])
-fi
-])
-
dnl Floating point format probe.
dnl The basic concept is the same as the above: grep the object
dnl file for an interesting string. We have to watch out for
fbigend=
case $ac_cv_c_float_format in
'IEEE (big-endian)' )
- if test $ac_cv_c_compile_endian = little-endian; then
+ if test $ac_cv_c_bigendian = no; then
fbigend=1
fi
;;
'IEEE (little-endian)' )
- if test $ac_cv_c_compile_endian = big-endian; then
+ if test $ac_cv_c_bigendian = yes; then
fbigend=0
fi
;;
dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
dnl those with the standalone portable GNU libiconv installed).
+ am_cv_lib_iconv_ldpath=
AC_ARG_WITH([libiconv-prefix],
[ --with-libiconv-prefix=DIR search for libiconv in DIR/include and DIR/lib], [
for dir in `echo "$withval" | tr : ' '`; do
if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
- if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
+ if test -d $dir/lib; then am_cv_lib_iconv_ldpath="-L$dir/lib"; fi
done
])
am_cv_func_iconv=yes)
if test "$am_cv_func_iconv" != yes; then
am_save_LIBS="$LIBS"
- LIBS="$LIBS -liconv"
+ LIBS="$LIBS $am_cv_libiconv_ldpath -liconv"
AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
[iconv_t cd = iconv_open("","");
fi
LIBICONV=
if test "$am_cv_lib_iconv" = yes; then
- LIBICONV="-liconv"
+ LIBICONV="$am_cv_lib_iconv_ldpath -liconv"
fi
AC_SUBST(LIBICONV)
])
INTL_LIBTOOL_SUFFIX_PREFIX=ifelse([$1], use-libtool, [l], [])
AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
])
+
+AC_DEFUN(gcc_AC_INITFINI_ARRAY,
+[AC_ARG_ENABLE(initfini-array,
+ [ --enable-initfini-array use .init_array/.fini_array sections],
+ [], [
+AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
+ gcc_cv_initfini_array, [dnl
+ AC_TRY_RUN([
+static int x = -1;
+int main (void) { return x; }
+int foo (void) { x = 0; }
+int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;],
+ [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
+ [gcc_cv_initfini_array=no])])
+ enable_initfini_array=$gcc_cv_initfini_array
+])
+if test $enable_initfini_array = yes; then
+ AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
+ [Define .init_array/.fini_array sections are available and working.])
+fi])
OSDN Git Service
