Mercurial > gnulib
view m4/ldexpf.m4 @ 40215:88b18d82fa61
crypto/des: Fix undefined behaviour.
* lib/des.c (READ_64BIT_DATA): Cast bytes to 'unsigned int', to avoid
shift operations on 'int'.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 22:21:25 +0100 |
parents | b06060465f09 |
children |
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# ldexpf.m4 serial 2 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_LDEXPF], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_LDEXP]) dnl Persuade glibc <math.h> to declare ldexpf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether ldexpf() exists. We cannot assume that ldexpf(), if it dnl exists, is defined in the same library as ldexp(). This is not the case dnl on FreeBSD, NetBSD, OpenBSD. gl_MATHFUNC([ldexpf], [float], [(float, int)]) if test $gl_cv_func_ldexpf_no_libm = no \ && test $gl_cv_func_ldexpf_in_libm = no; then HAVE_LDEXPF=0 LDEXPF_LIBM="$LDEXP_LIBM" fi AC_SUBST([LDEXPF_LIBM]) ])