1dnl Copyright (C) 1993-2003 Free Software Foundation, Inc.
2dnl This file is free software, distributed under the terms of the GNU
3dnl General Public License.  As a special exception to the GNU General
4dnl Public License, this file may be distributed as part of a program
5dnl that contains a configuration script generated by Autoconf, under
6dnl the same distribution terms as the rest of that program.
7
8dnl From Bruno Haible, Marcus Daniels.
9
10AC_PREREQ(2.13)
11
12AC_DEFUN([CL_WORDS_LITTLEENDIAN],
13[AC_CACHE_CHECK(byte ordering, cl_cv_sys_endian, [
14AC_TRY_RUN([int main () {
15  /* Are we little or big endian?  From Harbison&Steele.  */
16  union
17  {
18    long l;
19    char c[sizeof (long)];
20  } u;
21  u.l = 1;
22  exit (u.c[0] == 1);
23}],
24cl_cv_sys_endian="big endian",
25cl_cv_sys_endian="little endian",
26: # must guess the endianness
27)
28if test -z "$cl_cv_sys_endian"; then
29AC_EGREP_CPP(yes,[#if defined(m68k) || defined(__m68k__) || defined(mc68000) || defined(mc68020) || defined(__mc68020__) || defined(sparc) || defined(__sparc__) || defined(MIPSEB) || defined(__MIPSEB__) || defined(hppa) || defined(__hppa) || defined(m88000) || defined(__m88k__)
30  yes
31#endif
32], cl_cv_sys_endian="big endian")
33fi
34if test -z "$cl_cv_sys_endian"; then
35AC_EGREP_CPP(yes,[#if defined(i386) || defined(__i386) || defined(__i386__) || defined(_I386) || defined(MIPSEL) || defined(__MIPSEL__) || defined(__alpha)
36  yes
37#endif
38], cl_cv_sys_endian="little endian")
39fi
40if test -z "$cl_cv_sys_endian"; then
41cl_cv_sys_endian="guessing little endian"
42fi
43])
44case "$cl_cv_sys_endian" in
45  *little*)
46    AC_DEFINE(WORDS_LITTLEENDIAN, 1,
47      [Define if the machine's byte ordering is little endian.]) ;;
48  *big*) ;;
49esac
50])
51