Mercurial > gnulib
view m4/asinl.m4 @ 40198:5a34193cbc07
long-options: add parse_gnu_standard_options_only
Discussed in https://bugs.gnu.org/33468 .
* lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead
of 0.
(parse_gnu_standard_options_only): Add function to
process the GNU default options --help and --version and fail for any other
unknown long or short option. See
https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html .
* lib/long-options.h (parse_gnu_standard_options_only): Declare it.
* modules/long-options (depends-on): Add stdbool, exitfail.
* top/maint.mk (sc_prohibit_long_options_without_use): Update
syntax-check rule, add new function name.
author | Bernhard Voelker <mail@bernhard-voelker.de> |
---|---|
date | Thu, 29 Nov 2018 09:06:26 +0100 |
parents | b06060465f09 |
children |
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# asinl.m4 serial 8 dnl Copyright (C) 2010-2019 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_FUNC_ASINL], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) dnl Persuade glibc <math.h> to declare asinl(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) ASINL_LIBM= AC_CACHE_CHECK([whether asinl() can be used without linking with libm], [gl_cv_func_asinl_no_libm], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> long double (*funcptr) (long double) = asinl; long double x;]], [[return funcptr (x) > 1 || asinl (x) > 1;]])], [gl_cv_func_asinl_no_libm=yes], [gl_cv_func_asinl_no_libm=no]) ]) if test $gl_cv_func_asinl_no_libm = no; then AC_CACHE_CHECK([whether asinl() can be used with libm], [gl_cv_func_asinl_in_libm], [ save_LIBS="$LIBS" LIBS="$LIBS -lm" AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> long double (*funcptr) (long double) = asinl; long double x;]], [[return funcptr (x) > 1 || asinl (x) > 1;]])], [gl_cv_func_asinl_in_libm=yes], [gl_cv_func_asinl_in_libm=no]) LIBS="$save_LIBS" ]) if test $gl_cv_func_asinl_in_libm = yes; then ASINL_LIBM=-lm fi fi if test $gl_cv_func_asinl_no_libm = yes \ || test $gl_cv_func_asinl_in_libm = yes; then dnl Also check whether it's declared. dnl Mac OS X 10.3 has asinl() in libc but doesn't declare it in <math.h>. AC_CHECK_DECL([asinl], , [HAVE_DECL_ASINL=0], [[#include <math.h>]]) else HAVE_DECL_ASINL=0 HAVE_ASINL=0 dnl Find libraries needed to link lib/asinl.c. if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then AC_REQUIRE([gl_FUNC_ASIN]) ASINL_LIBM="$ASIN_LIBM" else AC_REQUIRE([gl_FUNC_SQRTL]) dnl Append $SQRTL_LIBM to ASINL_LIBM, avoiding gratuitous duplicates. case " $ASINL_LIBM " in *" $SQRTL_LIBM "*) ;; *) ASINL_LIBM="$ASINL_LIBM $SQRTL_LIBM" ;; esac fi fi AC_SUBST([ASINL_LIBM]) ])