if test "${ac_cv_c_bigendian+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
- ac_cv_c_bigendian=unknown
-# See if sys/param.h defines the BYTE_ORDER macro.
+ # See if sys/param.h defines the BYTE_ORDER macro.
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
/* end confdefs.h. */
#include <sys/types.h>
#include <sys/param.h>
+
int
main ()
{
-
#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
bogus endian macros
#endif
+
;
return 0;
}
/* end confdefs.h. */
#include <sys/types.h>
#include <sys/param.h>
+
int
main ()
{
-
#if BYTE_ORDER != BIG_ENDIAN
not big endian
#endif
+
;
return 0;
}
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
+# It does not; compile a test program.
+if test "$cross_compiling" = yes; then
+ # try to guess the endianness by grepping values into an object file
+ ac_cv_c_bigendian=unknown
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+short ascii_mm[] = { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
+short ascii_ii[] = { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
+void _ascii () { char *s = (char *) ascii_mm; s = (char *) ascii_ii; }
+short ebcdic_ii[] = { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
+short ebcdic_mm[] = { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
+void _ebcdic () { char *s = (char *) ebcdic_mm; s = (char *) ebcdic_ii; }
+int
+main ()
+{
+ _ascii (); _ebcdic ();
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -z "$ac_c_werror_flag"
+ || test ! -s conftest.err'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ if grep BIGenDianSyS conftest.$ac_objext >/dev/null ; then
+ ac_cv_c_bigendian=yes
+fi
+if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+ if test "$ac_cv_c_bigendian" = unknown; then
+ ac_cv_c_bigendian=no
+ else
+ # finding both strings is unlikely to happen, but who knows?
+ ac_cv_c_bigendian=unknown
+ fi
+fi
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
-if test $ac_cv_c_bigendian = unknown; then
-if test "$cross_compiling" = yes; then
- echo $ac_n "cross-compiling... " 2>&6
else
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
-main () {
+int
+main ()
+{
/* Are we little or big endian? From Harbison&Steele. */
union
{
rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
fi
fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
fi
echo "$as_me:$LINENO: result: $ac_cv_c_bigendian" >&5
echo "${ECHO_T}$ac_cv_c_bigendian" >&6
-if test $ac_cv_c_bigendian = unknown; then
-echo "$as_me:$LINENO: checking to probe for byte ordering" >&5
-echo $ECHO_N "checking to probe for byte ordering... $ECHO_C" >&6
-
-cat >conftest.c <<EOF
-short ascii_mm[] = { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
-short ascii_ii[] = { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
-void _ascii() { char* s = (char*) ascii_mm; s = (char*) ascii_ii; }
-short ebcdic_ii[] = { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
-short ebcdic_mm[] = { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
-void _ebcdic() { char* s = (char*) ebcdic_mm; s = (char*) ebcdic_ii; }
-int main() { _ascii (); _ebcdic (); return 0; }
-EOF
- if test -f conftest.c ; then
- if ${CC-cc} ${CFLAGS} -c conftest.c -o conftest.o && test -f conftest.o ; then
- if test `grep -l BIGenDianSyS conftest.o` ; then
- echo $ac_n ' big endian probe OK, ' 1>&6
- ac_cv_c_bigendian=yes
- fi
- if test `grep -l LiTTleEnDian conftest.o` ; then
- echo $ac_n ' little endian probe OK, ' 1>&6
- if test $ac_cv_c_bigendian = yes ; then
- ac_cv_c_bigendian=unknown;
- else
- ac_cv_c_bigendian=no
- fi
- fi
- echo $ac_n 'guessing bigendian ... ' >&6
- fi
- fi
-echo "$as_me:$LINENO: result: $ac_cv_c_bigendian" >&5
-echo "${ECHO_T}$ac_cv_c_bigendian" >&6
-fi
-if test $ac_cv_c_bigendian = yes; then
+case $ac_cv_c_bigendian in
+ yes)
cat >>confdefs.h <<\_ACEOF
#define WORDS_BIGENDIAN 1
_ACEOF
-
-
-cat >>confdefs.h <<\_ACEOF
-#define HOST_WORDS_BIG_ENDIAN 1
-_ACEOF
-
- BYTEORDER=4321
-else
- BYTEORDER=1234
-fi
-
-cat >>confdefs.h <<_ACEOF
-#define BYTEORDER $BYTEORDER
-_ACEOF
-
-if test $ac_cv_c_bigendian = unknown; then
- { { echo "$as_me:$LINENO: error: unknown endianess - sorry, please pre-set ac_cv_c_bigendian" >&5
-echo "$as_me: error: unknown endianess - sorry, please pre-set ac_cv_c_bigendian" >&2;}
- { (exit 1); exit 1; }; }
-fi
+ ;;
+ no)
+ ;;
+ *)
+ { { echo "$as_me:$LINENO: error: unknown endianness
+presetting ac_cv_c_bigendian=no (or yes) will help" >&5
+echo "$as_me: error: unknown endianness
+presetting ac_cv_c_bigendian=no (or yes) will help" >&2;}
+ { (exit 1); exit 1; }; } ;;
+esac
# --------
projects / thirdparty / gcc.git / commitdiff
