From 1bdc3263719ddd23c68fc9db896388670451b58c Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Wed, 31 Oct 2007 12:55:02 +0100 Subject: Ensure AC_TYPE_LONG_LONG_INT and AC_TYPE_UNSIGNED_LONG_LONG_INT are consistent. --- m4/longlong.m4 | 75 ++++++++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 60 insertions(+), 15 deletions(-) (limited to 'm4/longlong.m4') diff --git a/m4/longlong.m4 b/m4/longlong.m4 index 5799c3965a..15dc21b8e4 100644 --- a/m4/longlong.m4 +++ b/m4/longlong.m4 @@ -1,4 +1,4 @@ -# longlong.m4 serial 11 +# longlong.m4 serial 12 dnl Copyright (C) 1999-2007 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -18,23 +18,11 @@ AC_DEFUN([AC_TYPE_LONG_LONG_INT], [ AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int], [AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [[#if ! (-9223372036854775807LL < 0 && 0 < 9223372036854775807ll) - error in preprocessor; - #endif - long long int ll = 9223372036854775807ll; - long long int nll = -9223372036854775807LL; - typedef int a[((-9223372036854775807LL < 0 - && 0 < 9223372036854775807ll) - ? 1 : -1)]; - int i = 63;]], - [[long long int llmax = 9223372036854775807ll; - return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i) - | (llmax / ll) | (llmax % ll));]])], + [_AC_TYPE_LONG_LONG_SNIPPET], [dnl This catches a bug in Tandem NonStop Kernel (OSS) cc -O circa 2004. dnl If cross compiling, assume the bug isn't important, since dnl nobody cross compiles for this platform as far as we know. - AC_RUN_IFELSE( + AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[@%:@include @%:@ifndef LLONG_MAX @@ -63,6 +51,63 @@ AC_DEFUN([AC_TYPE_LONG_LONG_INT], fi ]) +# Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works. +# This fixes a bug in Autoconf 2.61, but can be removed once we +# assume 2.62 everywhere. + +# Note: If the type 'unsigned long long int' exists but is only 32 bits +# large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT +# will not be defined. In this case you can treat 'unsigned long long int' +# like 'unsigned long int'. + +AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT], +[ + AC_CACHE_CHECK([for unsigned long long int], + [ac_cv_type_unsigned_long_long_int], + [AC_LINK_IFELSE( + [_AC_TYPE_LONG_LONG_SNIPPET], + [ac_cv_type_unsigned_long_long_int=yes], + [ac_cv_type_unsigned_long_long_int=no])]) + if test $ac_cv_type_unsigned_long_long_int = yes; then + AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1, + [Define to 1 if the system has the type `unsigned long long int'.]) + fi +]) + +# Expands to a C program that can be used to test for simultaneous support +# of 'long long' and 'unsigned long long'. We don't want to say that +# 'long long' is available if 'unsigned long long' is not, or vice versa, +# because too many programs rely on the symmetry between signed and unsigned +# integer types (excluding 'bool'). +AC_DEFUN([_AC_TYPE_LONG_LONG_SNIPPET], +[ + AC_LANG_PROGRAM( + [[/* Test preprocessor. */ + #if ! (-9223372036854775807LL < 0 && 0 < 9223372036854775807ll) + error in preprocessor; + #endif + #if ! (18446744073709551615ULL <= -1ull) + error in preprocessor; + #endif + /* Test literals. */ + long long int ll = 9223372036854775807ll; + long long int nll = -9223372036854775807LL; + unsigned long long int ull = 18446744073709551615ULL; + /* Test constant expressions. */ + typedef int a[((-9223372036854775807LL < 0 && 0 < 9223372036854775807ll) + ? 1 : -1)]; + typedef int b[(18446744073709551615ULL <= (unsigned long long int) -1 + ? 1 : -1)]; + int i = 63;]], + [[/* Test availability of runtime routines for shift and division. */ + long long int llmax = 9223372036854775807ll; + unsigned long long int ullmax = 18446744073709551615ull; + return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i) + | (llmax / ll) | (llmax % ll) + | (ull << 63) | (ull >> 63) | (ull << i) | (ull >> i) + | (ullmax / ull) | (ullmax % ull));]]) +]) + # This macro is obsolescent and should go away soon. AC_DEFUN([gl_AC_TYPE_LONG_LONG], [ -- cgit v1.2.1