Mercurial > gnulib
view m4/stdnoreturn.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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# Check for stdnoreturn.h that conforms to C11. dnl Copyright 2012-2019 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. # Prepare for substituting <stdnoreturn.h> if it is not supported. AC_DEFUN([gl_STDNORETURN_H], [ AC_REQUIRE([AC_CANONICAL_HOST]) case "$host_os" in cygwin*) dnl Regardless whether a working <stdnoreturn.h> exists or not, dnl we need our own <stdnoreturn.h>, because of the definition dnl of _Noreturn done by gnulib-common.m4. STDNORETURN_H='stdnoreturn.h' ;; *) AC_CACHE_CHECK([for working stdnoreturn.h], [gl_cv_header_working_stdnoreturn_h], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <stdlib.h> #include <stdnoreturn.h> /* Do not check for 'noreturn' after the return type. C11 allows it, but it's rarely done that way and circa-2012 bleeding-edge GCC rejects it when given -Werror=old-style-declaration. */ noreturn void foo1 (void) { exit (0); } _Noreturn void foo2 (void) { exit (0); } int testit (int argc, char **argv) { if (argc & 1) return 0; (argv[0][0] ? foo1 : foo2) (); } ]])], [gl_cv_header_working_stdnoreturn_h=yes], [gl_cv_header_working_stdnoreturn_h=no])]) if test $gl_cv_header_working_stdnoreturn_h = yes; then STDNORETURN_H='' else STDNORETURN_H='stdnoreturn.h' fi ;; esac AC_SUBST([STDNORETURN_H]) AM_CONDITIONAL([GL_GENERATE_STDNORETURN_H], [test -n "$STDNORETURN_H"]) ])