1# stdint.m4 serial 4 2dnl Copyright (C) 2001-2002, 2004-2005 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Bruno Haible. 8dnl Test whether <stdint.h> is supported or must be substituted. 9 10AC_DEFUN([gl_STDINT_H], 11[dnl Check for <inttypes.h>. 12AC_REQUIRE([gt_HEADER_INTTYPES_H]) 13dnl Check for <sys/inttypes.h>. 14AC_CHECK_HEADERS([sys/inttypes.h]) 15 16AC_MSG_CHECKING([for stdint.h]) 17AC_CACHE_VAL(gl_cv_header_stdint_h, [ 18 AC_TRY_COMPILE([#include <stdint.h>], [], 19 gl_cv_header_stdint_h=yes, gl_cv_header_stdint_h=no)]) 20AC_MSG_RESULT([$gl_cv_header_stdint_h]) 21if test $gl_cv_header_stdint_h = yes; then 22 AC_DEFINE(HAVE_STDINT_H, 1, 23 [Define if you have a working <stdint.h> header file.]) 24 STDINT_H='' 25else 26 STDINT_H='stdint.h' 27 28 dnl Is long == int64_t ? 29 AC_CACHE_CHECK([whether 'long' is 64 bit wide], gl_cv_long_bitsize_64, [ 30 AC_TRY_COMPILE([ 31#define POW63 ((((((long) 1 << 15) << 15) << 15) << 15) << 3) 32#define POW64 ((((((long) 1 << 15) << 15) << 15) << 15) << 4) 33typedef int array [2 * (POW63 != 0 && POW64 == 0) - 1]; 34], , gl_cv_long_bitsize_64=yes, gl_cv_long_bitsize_64=no)]) 35 if test $gl_cv_long_bitsize_64 = yes; then 36 HAVE_LONG_64BIT=1 37 else 38 HAVE_LONG_64BIT=0 39 fi 40 AC_SUBST(HAVE_LONG_64BIT) 41 42 dnl Is long long == int64_t ? 43 AC_CACHE_CHECK([whether 'long long' is 64 bit wide], gl_cv_longlong_bitsize_64, [ 44 AC_TRY_COMPILE([ 45#define POW63 ((((((long long) 1 << 15) << 15) << 15) << 15) << 3) 46#define POW64 ((((((long long) 1 << 15) << 15) << 15) << 15) << 4) 47typedef int array [2 * (POW63 != 0 && POW64 == 0) - 1]; 48], , gl_cv_longlong_bitsize_64=yes, gl_cv_longlong_bitsize_64=no)]) 49 if test $gl_cv_longlong_bitsize_64 = yes; then 50 HAVE_LONG_LONG_64BIT=1 51 else 52 HAVE_LONG_LONG_64BIT=0 53 fi 54 AC_SUBST(HAVE_LONG_LONG_64BIT) 55 56fi 57AC_SUBST(STDINT_H) 58]) 59