1# Copyright (C) 2002-2018 Free Software Foundation, Inc.
2#
3# This file is part of GCC.
4#
5# GCC is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 3, or (at your option)
8# any later version.
9#
10# GCC is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13# GNU General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License
16# along with GCC; see the file COPYING3.  If not see
17# <http://www.gnu.org/licenses/>.
18
19# On Debian, Ubuntu and other derivative distributions, the 32bit libraries
20# are found in /lib32 and /usr/lib32, /lib64 and /usr/lib64 are symlinks to
21# /lib and /usr/lib, while other distributions install libraries into /lib64
22# and /usr/lib64.  The LSB does not enforce the use of /lib64 and /usr/lib64,
23# it doesn't tell anything about the 32bit libraries on those systems.  Set
24# MULTILIB_OSDIRNAMES according to what is found on the target.
25
26# To support i386, x86-64 and x32 libraries, the directory structrue
27# should be:
28#
29# 	/lib has i386 libraries.
30# 	/lib64 has x86-64 libraries.
31# 	/libx32 has x32 libraries.
32#
33comma=,
34MULTILIB_OPTIONS    = $(subst $(comma),/,$(TM_MULTILIB_CONFIG))
35MULTILIB_DIRNAMES   = $(patsubst m%, %, $(subst /, ,$(MULTILIB_OPTIONS)))
36MULTILIB_OSDIRNAMES = m64=../lib64$(call if_multiarch,:x86_64-linux-gnu)
37MULTILIB_OSDIRNAMES+= m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:i386-linux-gnu)
38MULTILIB_OSDIRNAMES+= mx32=../libx32$(call if_multiarch,:x86_64-linux-gnux32)
39