Mercurial > gnulib
view m4/extensions.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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# serial 18 -*- Autoconf -*- # Enable extensions on systems that normally disable them. # Copyright (C) 2003, 2006-2019 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from git # Autoconf. Perhaps we can remove this once we can assume Autoconf # 2.70 or later everywhere, but since Autoconf mutates rapidly # enough in this area it's likely we'll need to redefine # AC_USE_SYSTEM_EXTENSIONS for quite some time. # If autoconf reports a warning # warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS # or warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS # the fix is # 1) to ensure that AC_USE_SYSTEM_EXTENSIONS is never directly invoked # but always AC_REQUIREd, # 2) to ensure that for each occurrence of # AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) # or # AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) # the corresponding gnulib module description has 'extensions' among # its dependencies. This will ensure that the gl_USE_SYSTEM_EXTENSIONS # invocation occurs in gl_EARLY, not in gl_INIT. # AC_USE_SYSTEM_EXTENSIONS # ------------------------ # Enable extensions on systems that normally disable them, # typically due to standards-conformance issues. # # Remember that #undef in AH_VERBATIM gets replaced with #define by # AC_DEFINE. The goal here is to define all known feature-enabling # macros, then, if reports of conflicts are made, disable macros that # cause problems on some platforms (such as __EXTENSIONS__). AC_DEFUN_ONCE([AC_USE_SYSTEM_EXTENSIONS], [AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl AC_BEFORE([$0], [AC_RUN_IFELSE])dnl AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=]) if test "$MINIX" = yes; then AC_DEFINE([_POSIX_SOURCE], [1], [Define to 1 if you need to in order for 'stat' and other things to work.]) AC_DEFINE([_POSIX_1_SOURCE], [2], [Define to 2 if the system does not provide POSIX.1 features except with this defined.]) AC_DEFINE([_MINIX], [1], [Define to 1 if on MINIX.]) AC_DEFINE([_NETBSD_SOURCE], [1], [Define to 1 to make NetBSD features available. MINIX 3 needs this.]) fi dnl Use a different key than __EXTENSIONS__, as that name broke existing dnl configure.ac when using autoheader 2.62. 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