|
267
|
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 ])
|
