Mercurial > gnulib
view m4/powf.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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# powf.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_POWF], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_POW]) dnl Persuade glibc <math.h> to declare powf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether powf() exists. Assume that powf(), if it exists, is dnl defined in the same library as pow(). save_LIBS="$LIBS" LIBS="$LIBS $POW_LIBM" AC_CHECK_FUNCS([powf]) LIBS="$save_LIBS" if test $ac_cv_func_powf = yes; then POWF_LIBM="$POW_LIBM" else HAVE_POWF=0 POWF_LIBM="$POW_LIBM" fi AC_SUBST([POWF_LIBM]) ])