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comparison m4/multiarch.m4 @ 267:bec6d2480f08 2.6

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Added add'l generated files for release
author lost
date Tue, 22 Dec 2009 05:33:32 +0000
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266:5f25e7afac21 267:bec6d2480f08
1 # multiarch.m4 serial 4
2 dnl Copyright (C) 2008, 2009 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
6
7 # Determine whether the compiler is or may be producing universal binaries.
8 #
9 # On MacOS X 10.5 and later systems, the user can create libraries and
10 # executables that work on multiple system types--known as "fat" or
11 # "universal" binaries--by specifying multiple '-arch' options to the
12 # compiler but only a single '-arch' option to the preprocessor. Like
13 # this:
14 #
15 # ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
16 # CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
17 # CPP="gcc -E" CXXCPP="g++ -E"
18 #
19 # Detect this situation and set the macro AA_APPLE_UNIVERSAL_BUILD at the
20 # beginning of config.h and set APPLE_UNIVERSAL_BUILD accordingly.
21
22 dnl This macro must pass through AC_REQUIRE (never directly invoke it).
23 AC_DEFUN_ONCE([gl_MULTIARCH],
24 [
25 dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN.
26 gl_cv_c_multiarch=no
27 AC_COMPILE_IFELSE(
28 [AC_LANG_SOURCE(
29 [[#ifndef __APPLE_CC__
30 not a universal capable compiler
31 #endif
32 typedef int dummy;
33 ]])],
34 [
35 dnl Check for potential -arch flags. It is not universal unless
36 dnl there are at least two -arch flags with different values.
37 arch=
38 prev=
39 for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do
40 if test -n "$prev"; then
41 case $word in
42 i?86 | x86_64 | ppc | ppc64)
43 if test -z "$arch" || test "$arch" = "$word"; then
44 arch="$word"
45 else
46 gl_cv_c_multiarch=yes
47 fi
48 ;;
49 esac
50 prev=
51 else
52 if test "x$word" = "x-arch"; then
53 prev=arch
54 fi
55 fi
56 done
57 ])
58 if test $gl_cv_c_multiarch = yes; then
59 AC_DEFINE([AA_APPLE_UNIVERSAL_BUILD], [1],
60 [Define if the compiler is building for multiple architectures of Apple platforms at once.])
61 APPLE_UNIVERSAL_BUILD=1
62 else
63 APPLE_UNIVERSAL_BUILD=0
64 fi
65 AC_SUBST([APPLE_UNIVERSAL_BUILD])
66 ])