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Added test for big-endian machines

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svn: r622
This commit is contained in:
Eli Barzilay 2005-08-21 06:40:18 +00:00
parent 90d01023c5
commit febd5f8fff
4 changed files with 239 additions and 2 deletions
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232
src/configure vendored
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@ -1525,7 +1525,7 @@ fi
OS=`$UNAME -s` OS=`$UNAME -s`
###### Get data sizes ####### ###### Get data sizes & endian #######
ac_ext=c ac_ext=c
ac_cpp='$CPP $CPPFLAGS' ac_cpp='$CPP $CPPFLAGS'
@ -5016,6 +5016,236 @@ cat >>confdefs.h <<_ACEOF
_ACEOF _ACEOF
echo "$as_me:$LINENO: checking whether byte ordering is bigendian" >&5
echo $ECHO_N "checking whether byte ordering is bigendian... $ECHO_C" >&6
if test "${ac_cv_c_bigendian+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
# See if sys/param.h defines the BYTE_ORDER macro.
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_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;
}
_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 $ac_status); }; }; then
# It does; now see whether it defined to BIG_ENDIAN or not.
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <sys/types.h>
#include <sys/param.h>
int
main ()
{
#if BYTE_ORDER != BIG_ENDIAN
not big endian
#endif
;
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 $ac_status); }; }; then
ac_cv_c_bigendian=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
ac_cv_c_bigendian=no
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
else
echo "$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
else
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
int
main ()
{
/* Are we little or big endian? From Harbison&Steele. */
union
{
long l;
char c[sizeof (long)];
} u;
u.l = 1;
exit (u.c[sizeof (long) - 1] == 1);
}
_ACEOF
rm -f conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } && { ac_try='./conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_c_bigendian=no
else
echo "$as_me: program exited with status $ac_status" >&5
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
( exit $ac_status )
ac_cv_c_bigendian=yes
fi
rm -f core *.core gmon.out bb.out conftest$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
case $ac_cv_c_bigendian in
yes)
cat >>confdefs.h <<\_ACEOF
#define WORDS_BIGENDIAN 1
_ACEOF
;;
no)
;;
*)
{ { echo "$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
###### Some flags imply other flags ####### ###### Some flags imply other flags #######

3
src/mzscheme/configure.ac
View File

@ -79,13 +79,14 @@ fi
OS=`$UNAME -s` OS=`$UNAME -s`
###### Get data sizes ####### ###### Get data sizes & endian #######
AC_CHECK_SIZEOF(char) AC_CHECK_SIZEOF(char)
AC_CHECK_SIZEOF(short) AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int) AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long) AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long) AC_CHECK_SIZEOF(long long)
AC_C_BIGENDIAN()
###### Some flags imply other flags ####### ###### Some flags imply other flags #######

3
src/mzscheme/mzconfig.h.in
View File

@ -16,3 +16,6 @@
/* The size of a `long long', as computed by sizeof. */ /* The size of a `long long', as computed by sizeof. */
#undef SIZEOF_LONG_LONG #undef SIZEOF_LONG_LONG
/* Is this a big endian machine? */
#undef WORDS_BIGENDIAN

3
src/worksp/mzconfig.h
View File

@ -20,3 +20,6 @@
/* The size of a `long long', as computed by sizeof. */ /* The size of a `long long', as computed by sizeof. */
#undef SIZEOF_LONG_LONG #undef SIZEOF_LONG_LONG
/* Is this a big endian machine? */
#undef WORDS_BIGENDIAN