Mercurial > gnulib
view m4/rintf.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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# rintf.m4 serial 4 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_RINTF], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) dnl Persuade glibc <math.h> to declare rintf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Determine RINTF_LIBM. gl_MATHFUNC([rintf], [float], [(float)], [extern #ifdef __cplusplus "C" #endif float rintf (float); ]) if test $gl_cv_func_rintf_no_libm = yes \ || test $gl_cv_func_rintf_in_libm = yes; then HAVE_RINTF=1 dnl Also check whether it's declared. dnl IRIX 6.5 has rintf() in libm but doesn't declare it in <math.h>. AC_CHECK_DECLS([rintf], , [HAVE_DECL_RINTF=0], [[#include <math.h>]]) else HAVE_RINTF=0 HAVE_DECL_RINTF=0 RINTF_LIBM= fi AC_SUBST([RINTF_LIBM]) ])