granicus.if.org Git - strace/blob - m4/long_long.m4

   1 dnl ### A macro to determine if off_t is a long long
   2 AC_DEFUN([AC_OFF_T_IS_LONG_LONG],
   3 [AC_MSG_CHECKING(for long long off_t)
   4 AC_CACHE_VAL(ac_cv_have_long_long_off_t,
   5 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h>
   6 char a[(sizeof (off_t) == sizeof (long long) &&
   7         sizeof (off_t) > sizeof (long)) - 1];
   8 ]])],[ac_cv_have_long_long_off_t=yes],[ac_cv_have_long_long_off_t=no])])
   9 AC_MSG_RESULT($ac_cv_have_long_long_off_t)
  10 if test "$ac_cv_have_long_long_off_t" = yes
  11 then
  12         AC_DEFINE([HAVE_LONG_LONG_OFF_T], 1, [Define if off_t is a long long.])
  13 fi
  14 ])
  15
  16 dnl ### A macro to determine if rlim_t is a long long
  17 AC_DEFUN([AC_RLIM_T_IS_LONG_LONG],
  18 [AC_MSG_CHECKING(for long long rlim_t)
  19 AC_CACHE_VAL(ac_cv_have_long_long_rlim_t,
  20 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h>
  21 #include <sys/time.h>
  22 #include <sys/resource.h>
  23 char a[(sizeof (rlim_t) == sizeof (long long) &&
  24         sizeof (rlim_t) > sizeof (long)) - 1];
  25 ]])],[ac_cv_have_long_long_rlim_t=yes],[ac_cv_have_long_long_rlim_t=no])])
  26 AC_MSG_RESULT($ac_cv_have_long_long_rlim_t)
  27 if test "$ac_cv_have_long_long_rlim_t" = yes
  28 then
  29         AC_DEFINE([HAVE_LONG_LONG_RLIM_T], 1, [Define if rlim_t is a long long.])
  30 fi
  31 ])
  32
  33 dnl ### A macro to determine endianness of long long
  34 AC_DEFUN([AC_LITTLE_ENDIAN_LONG_LONG],
  35 [AC_MSG_CHECKING(for little endian long long)
  36 AC_CACHE_VAL(ac_cv_have_little_endian_long_long,
  37 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
  38 int main () {
  39         union {
  40                 long long ll;
  41                 int l [2];
  42         } u;
  43         u.ll = 0x12345678;
  44         if (u.l[0] == 0x12345678)
  45                 return 0;
  46         return 1;
  47 }
  48 ]])],[ac_cv_have_little_endian_long_long=yes],[ac_cv_have_little_endian_long_long=no],[
  49 if test "x$ac_cv_c_bigendian" = "xyes"; then
  50         ac_cv_have_little_endian_long_long=no
  51 else
  52         ac_cv_have_little_endian_long_long=yes
  53 fi
  54 ])])
  55 AC_MSG_RESULT($ac_cv_have_little_endian_long_long)
  56 if test "$ac_cv_have_little_endian_long_long" = yes
  57 then
  58         AC_DEFINE([HAVE_LITTLE_ENDIAN_LONG_LONG], 1,
  59 [Define if long long is little-endian.])
  60 fi
  61 ])