| # The AC_MULTILIB macro was extracted and modified from |
| # gettext-0.15's AC_LIB_PREPARE_MULTILIB macro in the lib-prefix.m4 file |
| # so that the correct paths can be used for 64-bit libraries. |
| # |
| dnl Copyright (C) 2001-2005 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. |
| dnl From Bruno Haible. |
| |
| dnl AC_MULTILIB creates a variable libdirsuffix, containing |
| dnl the suffix of the libdir, either "" or "64". |
| dnl Only do this if the given enable parameter is "yes". |
| AC_DEFUN([AC_MULTILIB], |
| [ |
| dnl There is no formal standard regarding lib and lib64. The current |
| dnl practice is that on a system supporting 32-bit and 64-bit instruction |
| dnl sets or ABIs, 64-bit libraries go under $prefix/lib64 and 32-bit |
| dnl libraries go under $prefix/lib. We determine the compiler's default |
| dnl mode by looking at the compiler's library search path. If at least |
| dnl of its elements ends in /lib64 or points to a directory whose absolute |
| dnl pathname ends in /lib64, we assume a 64-bit ABI. Otherwise we use the |
| dnl default, namely "lib". |
| enable_lib64="$1" |
| libdirsuffix="" |
| searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'` |
| if test "$enable_lib64" = "yes" -a -n "$searchpath"; then |
| save_IFS="${IFS= }"; IFS=":" |
| for searchdir in $searchpath; do |
| if test -d "$searchdir"; then |
| case "$searchdir" in |
| */lib64/ | */lib64 ) libdirsuffix=64 ;; |
| *) searchdir=`cd "$searchdir" && pwd` |
| case "$searchdir" in |
| */lib64 ) libdirsuffix=64 ;; |
| esac ;; |
| esac |
| fi |
| done |
| IFS="$save_IFS" |
| fi |
| AC_SUBST(libdirsuffix) |
| ]) |
