| 1 | # multiarch.m4 serial 6
|
|---|
| 2 | dnl Copyright (C) 2008-2012 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 APPLE_UNIVERSAL_BUILD accordingly.
|
|---|
| 20 |
|
|---|
| 21 | AC_DEFUN_ONCE([gl_MULTIARCH],
|
|---|
| 22 | [
|
|---|
| 23 | dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN.
|
|---|
| 24 | gl_cv_c_multiarch=no
|
|---|
| 25 | AC_COMPILE_IFELSE(
|
|---|
| 26 | [AC_LANG_SOURCE(
|
|---|
| 27 | [[#ifndef __APPLE_CC__
|
|---|
| 28 | not a universal capable compiler
|
|---|
| 29 | #endif
|
|---|
| 30 | typedef int dummy;
|
|---|
| 31 | ]])],
|
|---|
| 32 | [
|
|---|
| 33 | dnl Check for potential -arch flags. It is not universal unless
|
|---|
| 34 | dnl there are at least two -arch flags with different values.
|
|---|
| 35 | arch=
|
|---|
| 36 | prev=
|
|---|
| 37 | for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do
|
|---|
| 38 | if test -n "$prev"; then
|
|---|
| 39 | case $word in
|
|---|
| 40 | i?86 | x86_64 | ppc | ppc64)
|
|---|
| 41 | if test -z "$arch" || test "$arch" = "$word"; then
|
|---|
| 42 | arch="$word"
|
|---|
| 43 | else
|
|---|
| 44 | gl_cv_c_multiarch=yes
|
|---|
| 45 | fi
|
|---|
| 46 | ;;
|
|---|
| 47 | esac
|
|---|
| 48 | prev=
|
|---|
| 49 | else
|
|---|
| 50 | if test "x$word" = "x-arch"; then
|
|---|
| 51 | prev=arch
|
|---|
| 52 | fi
|
|---|
| 53 | fi
|
|---|
| 54 | done
|
|---|
| 55 | ])
|
|---|
| 56 | if test $gl_cv_c_multiarch = yes; then
|
|---|
| 57 | APPLE_UNIVERSAL_BUILD=1
|
|---|
| 58 | else
|
|---|
| 59 | APPLE_UNIVERSAL_BUILD=0
|
|---|
| 60 | fi
|
|---|
| 61 | AC_SUBST([APPLE_UNIVERSAL_BUILD])
|
|---|
| 62 | ])
|
|---|
