Mercurial > gnulib
view m4/asinf.m4 @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
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date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
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# asinf.m4 serial 3 dnl Copyright (C) 2011-2019 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_ASINF], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_ASIN]) dnl Persuade glibc <math.h> to declare asinf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether asinf() exists. Assume that asinf(), if it exists, is dnl defined in the same library as asin(). save_LIBS="$LIBS" LIBS="$LIBS $ASIN_LIBM" AC_CHECK_FUNCS([asinf]) LIBS="$save_LIBS" if test $ac_cv_func_asinf = yes; then ASINF_LIBM="$ASIN_LIBM" else HAVE_ASINF=0 dnl If the function is declared but does not appear to exist, it may be dnl defined as an inline function. In order to avoid a conflict, we have dnl to define rpl_asinf, not asinf. AC_CHECK_DECLS([asinf], [REPLACE_ASINF=1], , [[#include <math.h>]]) ASINF_LIBM="$ASIN_LIBM" fi AC_SUBST([ASINF_LIBM]) ])