| dnl ### A macro to determine endianness of long long |
| AC_DEFUN([AC_LITTLE_ENDIAN_LONG_LONG], |
| [AC_MSG_CHECKING(for little endian long long) |
| AC_CACHE_VAL(ac_cv_have_little_endian_long_long, |
| [AC_RUN_IFELSE([AC_LANG_SOURCE([[ |
| int main () { |
| union { |
| long long ll; |
| int l [2]; |
| } u; |
| u.ll = 0x12345678; |
| if (u.l[0] == 0x12345678) |
| return 0; |
| return 1; |
| } |
| ]])],[ac_cv_have_little_endian_long_long=yes],[ac_cv_have_little_endian_long_long=no],[ |
| if test "x$ac_cv_c_bigendian" = "xyes"; then |
| ac_cv_have_little_endian_long_long=no |
| else |
| ac_cv_have_little_endian_long_long=yes |
| fi |
| ])]) |
| AC_MSG_RESULT($ac_cv_have_little_endian_long_long) |
| if test "$ac_cv_have_little_endian_long_long" = yes |
| then |
| AC_DEFINE([HAVE_LITTLE_ENDIAN_LONG_LONG], 1, |
| [Define if long long is little-endian.]) |
| fi |
| ]) |
