git.m6w6.name Git - m6w6/libmemcached/blob - m4/byteorder.m4

   1 AC_DEFUN([DETECT_BYTEORDER],
   2 [
   3     AC_MSG_CHECKING([for htonll])
   4     have_htoll="no"
   5     AC_RUN_IFELSE([
   6        AC_LANG_PROGRAM([
   7 #include <sys/types.h>
   8 #include <netinet/in.h>
   9 #include <inttypes.h>
  10        ], [
  11           return htonll(0);
  12        ])
  13     ], [
  14       have_htoll="yes"
  15       AC_DEFINE([HAVE_HTONLL], [1], [Have ntohll])
  16     ])
  17
  18     AC_MSG_RESULT([$have_htoll])
  19     AM_CONDITIONAL([BUILD_BYTEORDER],[test "x$have_htoll" = "xno"])
  20     AC_MSG_CHECKING([byteorder])
  21     have_htoll="no"
  22     AC_RUN_IFELSE([
  23        AC_LANG_PROGRAM([
  24 #include <sys/types.h>
  25 #include <netinet/in.h>
  26 #include <inttypes.h>
  27        ], [
  28 if (htonl(5) != 5) {
  29    return 1;
  30 }
  31        ])
  32     ], [
  33        AC_MSG_RESULT([big endian])
  34        AC_DEFINE([BYTEORDER_BIG_ENDIAN], [1], [Enable big endian byteorder])
  35     ], [
  36        AC_MSG_RESULT([little endian])
  37        AC_DEFINE([BYTEORDER_LITTLE_ENDIAN], [1], [Enable little endian byteorder])
  38     ])
  39 ])
  40