dnl Copyright (C) 1993-2003 Free Software Foundation, Inc. dnl This file is free software, distributed under the terms of the GNU dnl General Public License. As a special exception to the GNU General dnl Public License, this file may be distributed as part of a program dnl that contains a configuration script generated by Autoconf, under dnl the same distribution terms as the rest of that program. dnl From Bruno Haible, Marcus Daniels. AC_PREREQ(2.13) AC_DEFUN([CL_WORDS_LITTLEENDIAN], [AC_CACHE_CHECK(byte ordering, cl_cv_sys_endian, [ AC_TRY_RUN([int main () { /* Are we little or big endian? From Harbison&Steele. */ union { long l; char c[sizeof (long)]; } u; u.l = 1; exit (u.c[0] == 1); }], cl_cv_sys_endian="big endian", cl_cv_sys_endian="little endian", : # must guess the endianness ) if test -z "$cl_cv_sys_endian"; then AC_EGREP_CPP(yes,[#if defined(m68k) || defined(__m68k__) || defined(mc68000) || defined(mc68020) || defined(__mc68020__) || defined(sparc) || defined(__sparc__) || defined(MIPSEB) || defined(__MIPSEB__) || defined(hppa) || defined(__hppa) || defined(m88000) || defined(__m88k__) yes #endif ], cl_cv_sys_endian="big endian") fi if test -z "$cl_cv_sys_endian"; then AC_EGREP_CPP(yes,[#if defined(i386) || defined(__i386) || defined(__i386__) || defined(_I386) || defined(MIPSEL) || defined(__MIPSEL__) || defined(__alpha) yes #endif ], cl_cv_sys_endian="little endian") fi if test -z "$cl_cv_sys_endian"; then cl_cv_sys_endian="guessing little endian" fi ]) case "$cl_cv_sys_endian" in *little*) AC_DEFINE(WORDS_LITTLEENDIAN, 1, [Define if the machine's byte ordering is little endian.]) ;; *big*) ;; esac ])