diff options
| -rw-r--r-- | config/ChangeLog | 4 | ||||
| -rw-r--r-- | config/accross.m4 | 98 |
2 files changed, 102 insertions, 0 deletions
diff --git a/config/ChangeLog b/config/ChangeLog index 3f985d3..0ef1673 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,7 @@ +2002-11-23 H.J. Lu <hjl@gnu.org> + + * accross.m4: New. + 2002-11-10 Stan Shebs <shebs@apple.com> Retire common MPW configury bits. diff --git a/config/accross.m4 b/config/accross.m4 new file mode 100644 index 0000000..a4cebf6 --- /dev/null +++ b/config/accross.m4 @@ -0,0 +1,98 @@ +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]) + AC_DEFINE(HOST_WORDS_BIG_ENDIAN, 1, + [Define if the host machine stores words of multi-word integers in + big-endian order.]) + 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 +]) |