projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| f434ba03 PA |
1 | # multiarch.m4 serial 5 |
| 2 | dnl Copyright (C) 2008, 2009, 2010 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 | AC_DEFUN_ONCE([gl_MULTIARCH], | |
| 23 | [ | |
| 24 | dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN. | |
| 25 | gl_cv_c_multiarch=no | |
| 26 | AC_COMPILE_IFELSE( | |
| 27 | [AC_LANG_SOURCE( | |
| 28 | [[#ifndef __APPLE_CC__ | |
| 29 | not a universal capable compiler | |
| 30 | #endif | |
| 31 | typedef int dummy; | |
| 32 | ]])], | |
| 33 | [ | |
| 34 | dnl Check for potential -arch flags. It is not universal unless | |
| 35 | dnl there are at least two -arch flags with different values. | |
| 36 | arch= | |
| 37 | prev= | |
| 38 | for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do | |
| 39 | if test -n "$prev"; then | |
| 40 | case $word in | |
| 41 | i?86 | x86_64 | ppc | ppc64) | |
| 42 | if test -z "$arch" || test "$arch" = "$word"; then | |
| 43 | arch="$word" | |
| 44 | else | |
| 45 | gl_cv_c_multiarch=yes | |
| 46 | fi | |
| 47 | ;; | |
| 48 | esac | |
| 49 | prev= | |
| 50 | else | |
| 51 | if test "x$word" = "x-arch"; then | |
| 52 | prev=arch | |
| 53 | fi | |
| 54 | fi | |
| 55 | done | |
| 56 | ]) | |
| 57 | if test $gl_cv_c_multiarch = yes; then | |
| 58 | AC_DEFINE([AA_APPLE_UNIVERSAL_BUILD], [1], | |
| 59 | [Define if the compiler is building for multiple architectures of Apple platforms at once.]) | |
| 60 | APPLE_UNIVERSAL_BUILD=1 | |
| 61 | else | |
| 62 | APPLE_UNIVERSAL_BUILD=0 | |
| 63 | fi | |
| 64 | AC_SUBST([APPLE_UNIVERSAL_BUILD]) | |
| 65 | ]) |