Configure changes to enable cross compiling.

git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@49378 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 301 insertions, 155 deletions

diff --git a/libffi/ChangeLog b/libffi/ChangeLog
index 8a1b6980f96..2c59c6a3e43 100644
--- a/libffi/ChangeLog
+++ b/libffi/ChangeLog
@@ -1,3 +1,11 @@
+2002-01-31  Anthony Green  <green@redhat.com>
+
+	* configure: Rebuilt.
+	* configure.in: Replace CHECK_SIZEOF and endian tests with
+	cross-compiler friendly macros.
+	* aclocal.m4 (AC_COMPILE_CHECK_SIZEOF, AC_C_BIGENDIAN_CROSS): New
+	macros.
+
 2002-01-18  David Edelsohn  <edelsohn@gnu.org>
 
 	* src/powerpc/darwin.S (_ffi_call_AIX): New.
diff --git a/libffi/aclocal.m4 b/libffi/aclocal.m4
index 63ff94205d8..6d59d179c02 100644
--- a/libffi/aclocal.m4
+++ b/libffi/aclocal.m4
@@ -19,6 +19,102 @@ AC_DEFUN([AC_PROG_LIBTOOL],)
 AC_SUBST(LIBTOOL)
 ])
 
+AC_DEFUN([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 12 $2 ; 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
+])
+
+AC_DEFUN([AC_C_BIGENDIAN_CROSS],
+[AC_CACHE_CHECK(whether byte ordering is bigendian, ac_cv_c_bigendian,
+[ac_cv_c_bigendian=unknown
+# See if sys/param.h defines the BYTE_ORDER macro.
+AC_TRY_COMPILE([#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_TRY_COMPILE([#include <sys/types.h>
+#include <sys/param.h>], [
+#if BYTE_ORDER != BIG_ENDIAN
+ not big endian
+#endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
+if test $ac_cv_c_bigendian = unknown; then
+AC_TRY_RUN([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);
+}], ac_cv_c_bigendian=no, ac_cv_c_bigendian=yes,
+[ echo $ac_n "cross-compiling... " 2>&AC_FD_MSG ])
+fi])
+if test $ac_cv_c_bigendian = unknown; then
+AC_MSG_CHECKING(to probe for byte ordering)
+[
+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} 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>&AC_FD_MSG
+           ac_cv_c_bigendian=yes
+        fi
+        if test `grep -l LiTTleEnDian conftest.o` ; then
+           echo $ac_n ' little endian probe OK, ' 1>&AC_FD_MSG
+           if test $ac_cv_c_bigendian = yes ; then
+            ac_cv_c_bigendian=unknown;
+           else
+            ac_cv_c_bigendian=no
+           fi
+        fi
+        echo $ac_n 'guessing bigendian ...  ' >&AC_FD_MSG
+     fi
+  fi
+AC_MSG_RESULT($ac_cv_c_bigendian)
+fi
+if test $ac_cv_c_bigendian = yes; then
+  AC_DEFINE(WORDS_BIGENDIAN, 1, [whether byteorder is bigendian])
+  BYTEORDER=4321
+else
+  BYTEORDER=1234
+fi
+AC_DEFINE_UNQUOTED(BYTEORDER, $BYTEORDER, [1234 = LIL_ENDIAN, 4321 = BIGENDIAN])
+if test $ac_cv_c_bigendian = unknown; then
+  AC_MSG_ERROR(unknown endianess - sorry, please pre-set ac_cv_c_bigendian)
+fi
+])
+
 # Like AC_CONFIG_HEADER, but automatically create stamp file.
 
 AC_DEFUN(AM_CONFIG_HEADER,
diff --git a/libffi/configure b/libffi/configure
index f367f2e795b..4789f8568cd 100755
--- a/libffi/configure
+++ b/libffi/configure
@@ -2979,33 +2979,33 @@ echo "configure:2979: checking size of short" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_short'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 2987 "configure"
+#line 2985 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(short));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (short) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:2998: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_short=`cat conftestval`
+if { (eval echo configure:2995: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_short=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_short=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_short != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_short = x ; then
+  { echo "configure: error: cannot determine a size for short" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_short" 1>&6
 cat >> confdefs.h <<EOF
@@ -3018,33 +3018,33 @@ echo "configure:3018: checking size of int" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_int'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 3026 "configure"
+#line 3024 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(int));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (int) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:3037: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_int=`cat conftestval`
+if { (eval echo configure:3034: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_int=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_int=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_int != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_int = x ; then
+  { echo "configure: error: cannot determine a size for int" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_int" 1>&6
 cat >> confdefs.h <<EOF
@@ -3057,33 +3057,33 @@ echo "configure:3057: checking size of long" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_long'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 3065 "configure"
+#line 3063 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(long));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (long) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:3076: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_long=`cat conftestval`
+if { (eval echo configure:3073: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_long=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_long=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_long != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_long = x ; then
+  { echo "configure: error: cannot determine a size for long" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_long" 1>&6
 cat >> confdefs.h <<EOF
@@ -3096,33 +3096,33 @@ echo "configure:3096: checking size of long long" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_long_long'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 3104 "configure"
+#line 3102 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(long long));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (long long) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:3115: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_long_long=`cat conftestval`
+if { (eval echo configure:3112: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_long_long=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_long_long=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_long_long != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_long_long = x ; then
+  { echo "configure: error: cannot determine a size for long long" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_long_long" 1>&6
 cat >> confdefs.h <<EOF
@@ -3135,33 +3135,33 @@ echo "configure:3135: checking size of float" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_float'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 3143 "configure"
+#line 3141 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(float));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (float) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:3154: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_float=`cat conftestval`
+if { (eval echo configure:3151: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_float=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_float=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_float != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_float = x ; then
+  { echo "configure: error: cannot determine a size for float" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_float" 1>&6
 cat >> confdefs.h <<EOF
@@ -3174,33 +3174,33 @@ echo "configure:3174: checking size of double" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_double'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 3182 "configure"
+#line 3180 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(double));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (double) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:3193: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_double=`cat conftestval`
+if { (eval echo configure:3190: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_double=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_double=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_double != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_double = x ; then
+  { echo "configure: error: cannot determine a size for double" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_double" 1>&6
 cat >> confdefs.h <<EOF
@@ -3213,33 +3213,33 @@ echo "configure:3213: checking size of long double" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_long_double'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 3221 "configure"
+#line 3219 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(long double));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (long double) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:3232: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_long_double=`cat conftestval`
+if { (eval echo configure:3229: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_long_double=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_long_double=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_long_double != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_long_double = x ; then
+  { echo "configure: error: cannot determine a size for long double" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_long_double" 1>&6
 cat >> confdefs.h <<EOF
@@ -3253,33 +3253,33 @@ echo "configure:3253: checking size of void *" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_void_p'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
-  if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
-else
+  for ac_size in 4 8 1 2 16 12  ; do # List sizes in rough order of prevalence.
   cat > conftest.$ac_ext <<EOF
-#line 3261 "configure"
+#line 3259 "configure"
 #include "confdefs.h"
-#include <stdio.h>
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof(void *));
-  exit(0);
-}
+#include "confdefs.h"
+#include <sys/types.h>
+
+
+int main() {
+switch (0) case 0: case (sizeof (void *) == $ac_size):;
+; return 0; }
 EOF
-if { (eval echo configure:3272: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
-then
-  ac_cv_sizeof_void_p=`cat conftestval`
+if { (eval echo configure:3269: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_sizeof_void_p=$ac_size
 else
   echo "configure: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  rm -fr conftest*
-  ac_cv_sizeof_void_p=0
 fi
-rm -fr conftest*
+rm -f conftest*
+  if test x$ac_cv_sizeof_void_p != x ; then break; fi
+done
+
 fi
 
+if test x$ac_cv_sizeof_void_p = x ; then
+  { echo "configure: error: cannot determine a size for void *" 1>&2; exit 1; }
 fi
 echo "$ac_t""$ac_cv_sizeof_void_p" 1>&6
 cat >> confdefs.h <<EOF
@@ -3338,7 +3338,7 @@ fi
 rm -f conftest*
 if test $ac_cv_c_bigendian = unknown; then
 if test "$cross_compiling" = yes; then
-    { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
+   echo $ac_n "cross-compiling... " 2>&6 
 else
   cat > conftest.$ac_ext <<EOF
 #line 3345 "configure"
@@ -3370,11 +3370,53 @@ fi
 fi
 
 echo "$ac_t""$ac_cv_c_bigendian" 1>&6
+if test $ac_cv_c_bigendian = unknown; then
+echo $ac_n "checking to probe for byte ordering""... $ac_c" 1>&6
+echo "configure:3376: checking to probe for byte ordering" >&5
+
+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} 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 $ac_n 'guessing bigendian ...  ' >&6
+     fi
+  fi
+echo "$ac_t""$ac_cv_c_bigendian" 1>&6
+fi
 if test $ac_cv_c_bigendian = yes; then
   cat >> confdefs.h <<\EOF
 #define WORDS_BIGENDIAN 1
 EOF
 
+  BYTEORDER=4321
+else
+  BYTEORDER=1234
+fi
+cat >> confdefs.h <<EOF
+#define BYTEORDER $BYTEORDER
+EOF
+
+if test $ac_cv_c_bigendian = unknown; then
+  { echo "configure: error: unknown endianess - sorry" 1>&2; exit 1; }
 fi
 
 
diff --git a/libffi/configure.in b/libffi/configure.in
index 645b0403207..d0f26175afe 100644
--- a/libffi/configure.in
+++ b/libffi/configure.in
@@ -84,16 +84,16 @@ AC_CHECK_FUNCS(memcpy)
 AC_FUNC_ALLOCA
 
 dnl AC_CHECK_SIZEOF(char)
-AC_CHECK_SIZEOF(short)
-AC_CHECK_SIZEOF(int)
-AC_CHECK_SIZEOF(long)
-AC_CHECK_SIZEOF(long long)
-AC_CHECK_SIZEOF(float)
-AC_CHECK_SIZEOF(double)
-AC_CHECK_SIZEOF(long double)
-
-AC_CHECK_SIZEOF(void *)
-AC_C_BIGENDIAN
+AC_COMPILE_CHECK_SIZEOF(short)
+AC_COMPILE_CHECK_SIZEOF(int)
+AC_COMPILE_CHECK_SIZEOF(long)
+AC_COMPILE_CHECK_SIZEOF(long long)
+AC_COMPILE_CHECK_SIZEOF(float)
+AC_COMPILE_CHECK_SIZEOF(double)
+AC_COMPILE_CHECK_SIZEOF(long double)
+
+AC_COMPILE_CHECK_SIZEOF(void *)
+AC_C_BIGENDIAN_CROSS
 
 AC_SUBST(TARGET)
 AC_SUBST(TARGETDIR)