Mercurial > gnulib
view m4/multiarch.m4 @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 20:32:25 +0100 |
parents | b06060465f09 |
children |
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# multiarch.m4 serial 7 dnl Copyright (C) 2008-2019 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. # Determine whether the compiler is or may be producing universal binaries. # # On Mac OS X 10.5 and later systems, the user can create libraries and # executables that work on multiple system types--known as "fat" or # "universal" binaries--by specifying multiple '-arch' options to the # compiler but only a single '-arch' option to the preprocessor. Like # this: # # ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ # CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ # CPP="gcc -E" CXXCPP="g++ -E" # # Detect this situation and set APPLE_UNIVERSAL_BUILD accordingly. AC_DEFUN_ONCE([gl_MULTIARCH], [ dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN. gl_cv_c_multiarch=no AC_COMPILE_IFELSE( [AC_LANG_SOURCE( [[#ifndef __APPLE_CC__ not a universal capable compiler #endif typedef int dummy; ]])], [ dnl Check for potential -arch flags. It is not universal unless dnl there are at least two -arch flags with different values. arch= prev= for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do if test -n "$prev"; then case $word in i?86 | x86_64 | ppc | ppc64) if test -z "$arch" || test "$arch" = "$word"; then arch="$word" else gl_cv_c_multiarch=yes fi ;; esac prev= else if test "x$word" = "x-arch"; then prev=arch fi fi done ]) if test $gl_cv_c_multiarch = yes; then APPLE_UNIVERSAL_BUILD=1 else APPLE_UNIVERSAL_BUILD=0 fi AC_SUBST([APPLE_UNIVERSAL_BUILD]) ])