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build: Use AC_C_BIGENDIAN for detecting endian.

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* acinclude.m4 (GNUPG_CHECK_ENDIAN): Remove.
* configure.ac (BIG_ENDIAN_HOST): Use AC_C_BIGENDIAN
to detect endian and set BIG_ENDIAN_HOST.

--

Reported-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2024-10-11 09:57:49 +09:00
parent 57dce1ee62
commit f8bf5e01f7
No known key found for this signature in database
GPG key ID: 640114AF89DE6054
2 changed files with 4 additions and 83 deletions
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61
acinclude.m4
View file

@ -53,67 +53,6 @@ AC_DEFUN([GNUPG_CHECK_GNUMAKE],
])
dnl GNUPG_CHECK_ENDIAN
dnl define either LITTLE_ENDIAN_HOST or BIG_ENDIAN_HOST
dnl
AC_DEFUN([GNUPG_CHECK_ENDIAN],
[
tmp_assumed_endian=big
tmp_assume_warn=""
if test "$cross_compiling" = yes; then
case "$host_cpu" in
i@<:@345678@:>@* )
tmp_assumed_endian=little
;;
*)
;;
esac
fi
AC_MSG_CHECKING(endianness)
AC_CACHE_VAL(gnupg_cv_c_endian,
[ gnupg_cv_c_endian=unknown
# See if sys/param.h defines the BYTE_ORDER macro.
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
#include <sys/param.h>]], [[
#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
bogus endian macros
#endif]])], [# It does; now see whether it defined to BIG_ENDIAN or not.
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
#include <sys/param.h>]], [[
#if BYTE_ORDER != BIG_ENDIAN
not big endian
#endif]])], gnupg_cv_c_endian=big, gnupg_cv_c_endian=little)])
if test "$gnupg_cv_c_endian" = unknown; then
AC_RUN_IFELSE([AC_LANG_SOURCE([[main () {
/* Are we little or big endian? From Harbison&Steele. */
union
{
long l;
char c[sizeof (long)];
} u;
u.l = 1;
exit (u.c[sizeof (long) - 1] == 1);
}]])],
gnupg_cv_c_endian=little,
gnupg_cv_c_endian=big,
gnupg_cv_c_endian=$tmp_assumed_endian
tmp_assumed_warn=" (assumed)"
)
fi
])
AC_MSG_RESULT([${gnupg_cv_c_endian}${tmp_assumed_warn}])
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
])
# GNUPG_BUILD_PROGRAM(NAME,DEFAULT)
# Add a --enable-NAME option to configure an set the
# shell variable build_NAME either to "yes" or "no". DEFAULT must