Mercurial > gnulib
view m4/malloc.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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# malloc.m4 serial 17 dnl Copyright (C) 2007, 2009-2019 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. m4_version_prereq([2.70], [] ,[ # This is adapted with modifications from upstream Autoconf here: # https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=04be2b7a29d65d9a08e64e8e56e594c91749598c AC_DEFUN([_AC_FUNC_MALLOC_IF], [ AC_REQUIRE([AC_HEADER_STDC])dnl AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles AC_CHECK_HEADERS([stdlib.h]) AC_CACHE_CHECK([for GNU libc compatible malloc], [ac_cv_func_malloc_0_nonnull], [AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H # include <stdlib.h> #else char *malloc (); #endif ]], [[char *p = malloc (0); int result = !p; free (p); return result;]]) ], [ac_cv_func_malloc_0_nonnull=yes], [ac_cv_func_malloc_0_nonnull=no], [case "$host_os" in # Guess yes on platforms where we know the result. *-gnu* | gnu* | freebsd* | netbsd* | openbsd* \ | hpux* | solaris* | cygwin* | mingw*) ac_cv_func_malloc_0_nonnull=yes ;; # If we don't know, assume the worst. *) ac_cv_func_malloc_0_nonnull=no ;; esac ]) ]) AS_IF([test $ac_cv_func_malloc_0_nonnull = yes], [$1], [$2]) ])# _AC_FUNC_MALLOC_IF ]) # gl_FUNC_MALLOC_GNU # ------------------ # Test whether 'malloc (0)' is handled like in GNU libc, and replace malloc if # it is not. AC_DEFUN([gl_FUNC_MALLOC_GNU], [ AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) dnl _AC_FUNC_MALLOC_IF is defined in Autoconf. _AC_FUNC_MALLOC_IF( [AC_DEFINE([HAVE_MALLOC_GNU], [1], [Define to 1 if your system has a GNU libc compatible 'malloc' function, and to 0 otherwise.])], [AC_DEFINE([HAVE_MALLOC_GNU], [0]) REPLACE_MALLOC=1 ]) ]) # gl_FUNC_MALLOC_POSIX # -------------------- # Test whether 'malloc' is POSIX compliant (sets errno to ENOMEM when it # fails), and replace malloc if it is not. AC_DEFUN([gl_FUNC_MALLOC_POSIX], [ AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) AC_REQUIRE([gl_CHECK_MALLOC_POSIX]) if test $gl_cv_func_malloc_posix = yes; then AC_DEFINE([HAVE_MALLOC_POSIX], [1], [Define if the 'malloc' function is POSIX compliant.]) else REPLACE_MALLOC=1 fi ]) # Test whether malloc, realloc, calloc are POSIX compliant, # Set gl_cv_func_malloc_posix to yes or no accordingly. AC_DEFUN([gl_CHECK_MALLOC_POSIX], [ AC_CACHE_CHECK([whether malloc, realloc, calloc are POSIX compliant], [gl_cv_func_malloc_posix], [ dnl It is too dangerous to try to allocate a large amount of memory: dnl some systems go to their knees when you do that. So assume that dnl all Unix implementations of the function are POSIX compliant. AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[]], [[#if defined _WIN32 && ! defined __CYGWIN__ choke me #endif ]])], [gl_cv_func_malloc_posix=yes], [gl_cv_func_malloc_posix=no]) ]) ])