Mercurial > gnulib
view m4/stddef_h.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 A placeholder for <stddef.h>, for platforms that have issues. # stddef_h.m4 serial 6 dnl Copyright (C) 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. AC_DEFUN([gl_STDDEF_H], [ AC_REQUIRE([gl_STDDEF_H_DEFAULTS]) AC_REQUIRE([gt_TYPE_WCHAR_T]) STDDEF_H= dnl Test whether the type max_align_t exists and whether its alignment dnl "is as great as is supported by the implementation in all contexts". AC_CACHE_CHECK([for good max_align_t], [gl_cv_type_max_align_t], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <stddef.h> unsigned int s = sizeof (max_align_t); #if defined __GNUC__ || defined __IBM__ALIGNOF__ int check1[2 * (__alignof__ (double) <= __alignof__ (max_align_t)) - 1]; int check2[2 * (__alignof__ (long double) <= __alignof__ (max_align_t)) - 1]; #endif ]])], [gl_cv_type_max_align_t=yes], [gl_cv_type_max_align_t=no]) ]) if test $gl_cv_type_max_align_t = no; then HAVE_MAX_ALIGN_T=0 STDDEF_H=stddef.h fi if test $gt_cv_c_wchar_t = no; then HAVE_WCHAR_T=0 STDDEF_H=stddef.h fi AC_CACHE_CHECK([whether NULL can be used in arbitrary expressions], [gl_cv_decl_null_works], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stddef.h> int test[2 * (sizeof NULL == sizeof (void *)) -1]; ]])], [gl_cv_decl_null_works=yes], [gl_cv_decl_null_works=no])]) if test $gl_cv_decl_null_works = no; then REPLACE_NULL=1 STDDEF_H=stddef.h fi AC_SUBST([STDDEF_H]) AM_CONDITIONAL([GL_GENERATE_STDDEF_H], [test -n "$STDDEF_H"]) if test -n "$STDDEF_H"; then gl_NEXT_HEADERS([stddef.h]) fi ]) AC_DEFUN([gl_STDDEF_MODULE_INDICATOR], [ dnl Use AC_REQUIRE here, so that the default settings are expanded once only. AC_REQUIRE([gl_STDDEF_H_DEFAULTS]) gl_MODULE_INDICATOR_SET_VARIABLE([$1]) ]) AC_DEFUN([gl_STDDEF_H_DEFAULTS], [ dnl Assume proper GNU behavior unless another module says otherwise. REPLACE_NULL=0; AC_SUBST([REPLACE_NULL]) HAVE_MAX_ALIGN_T=1; AC_SUBST([HAVE_MAX_ALIGN_T]) HAVE_WCHAR_T=1; AC_SUBST([HAVE_WCHAR_T]) ])