Mercurial > gnulib
view m4/builtin-expect.m4 @ 40177:dcd889592b62
dtoastr,ftoastr,ldtoastr: port to c-strtod changes
Decouple these modules from c-strtod. Nowadays it’s reasonable to
assume the C99 signatures for strtod and strtold. Programs that
require stricter adherence to C99 should also use the strtod and
strtold modules as needed, and we no longer need the
HAVE_C99_STRTOLD macro.
* NEWS: Mention this.
* lib/ftoastr.c (STRTOF) [LENGTH == 3]: Assume strtold.
* m4/c-strtod.m4 (gl_C_STRTOLD): Do not define HAVE_C99_STRTOLD.
* modules/dtoastr, modules/ftoastr, modules/ldtoastr:
(Files): Remove m4/c-strtod.m4.
(configure.ac): Do not require gl_C99_STRTOLD, which no longer
exists.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 02 Feb 2019 13:01:55 -0800 |
parents | b06060465f09 |
children |
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dnl Check for __builtin_expect. dnl Copyright 2016-2019 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. dnl Written by Paul Eggert. AC_DEFUN([gl___BUILTIN_EXPECT], [ AC_CACHE_CHECK([for __builtin_expect], [gl_cv___builtin_expect], [AC_LINK_IFELSE( [AC_LANG_SOURCE([[ int main (int argc, char **argv) { argc = __builtin_expect (argc, 100); return argv[argc != 100][0]; }]])], [gl_cv___builtin_expect=yes], [AC_LINK_IFELSE( [AC_LANG_SOURCE([[ #include <builtins.h> int main (int argc, char **argv) { argc = __builtin_expect (argc, 100); return argv[argc != 100][0]; }]])], [gl_cv___builtin_expect="in <builtins.h>"], [gl_cv___builtin_expect=no])])]) if test "$gl_cv___builtin_expect" = yes; then AC_DEFINE([HAVE___BUILTIN_EXPECT], [1]) elif test "$gl_cv___builtin_expect" = "in <builtins.h>"; then AC_DEFINE([HAVE___BUILTIN_EXPECT], [2]) fi AH_VERBATIM([HAVE___BUILTIN_EXPECT], [/* Define to 1 if the compiler supports __builtin_expect, and to 2 if <builtins.h> does. */ #undef HAVE___BUILTIN_EXPECT #ifndef HAVE___BUILTIN_EXPECT # define __builtin_expect(e, c) (e) #elif HAVE___BUILTIN_EXPECT == 2 # include <builtins.h> #endif ]) ])