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# ullong_max.m4 - define ULLONG_MAX if necessary
dnl Copyright (C) 2005 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Written by Paul Eggert.
AC_DEFUN([gl_ULLONG_MAX],
[
dnl Avoid _AC_COMPUTE_INT-related macros, as they may not work with
dnl types wider than long int, due to problems with expr.
AC_CACHE_CHECK([whether ULONG_MAX < ULLONG_MAX],
[gl_cv_ulong_max_lt_ullong_max],
[AC_COMPILE_IFELSE(
[AC_LANG_BOOL_COMPILE_TRY(
[AC_INCLUDES_DEFAULT],
[[(unsigned long int) -1 < (unsigned long long int) -1]])],
[gl_cv_ulong_max_lt_ullong_max=yes],
[gl_cv_ulong_max_lt_ullong_max=no])])
if test $gl_cv_ulong_max_lt_ullong_max = yes; then
AC_DEFINE([ULONG_MAX_LT_ULLONG_MAX], 1,
[Define if ULONG_MAX < ULLONG_MAX, even if your compiler does not
support ULLONG_MAX.])
fi
])
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