From 85a7c5aeb82ed61e6ef6d8e061b9da9e6a4a652c Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 29 Mar 2013 09:10:06 +0400
Subject: [PATCH] 64-bit multilib hack.

GCC has internal multilib handling code but it assumes a very specific rigid directory
layout. The build system implementation of multilib layout is very generic and allows
complete customisation of the library directories.

This patch is a partial solution to allow any custom directories to be passed into gcc
and handled correctly. It forces gcc to use the base_libdir (which is the current
directory, "."). We need to do this for each multilib that is configured as we don't
know which compiler options may be being passed into the compiler. Since we have a compiler
per mulitlib at this point that isn't an issue.

The one problem is the target compiler is only going to work for the default multlilib at
this point. Ideally we'd figure out which multilibs were being enabled with which paths
and be able to patch these entries with a complete set of correct paths but this we
don't have such code at this point. This is something the target gcc recipe should do
and override these platform defaults in its build config.

Do same for riscv64 and aarch64

RP 15/8/11

Upstream-Status: Inappropriate[OE-Specific]

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Elvis Dowson <elvis.dowson@gmail.com>
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
---
 gcc/config/aarch64/t-aarch64-linux |  8 ++++----
 gcc/config/i386/t-linux64          |  6 ++----
 gcc/config/mips/t-linux64          | 10 +++-------
 gcc/config/riscv/t-linux           |  6 ++++--
 gcc/config/rs6000/t-linux64        |  5 ++---
 5 files changed, 15 insertions(+), 20 deletions(-)

diff --git a/gcc/config/aarch64/t-aarch64-linux b/gcc/config/aarch64/t-aarch64-linux
index 83e59e33b85..b1356be1fb4 100644
--- a/gcc/config/aarch64/t-aarch64-linux
+++ b/gcc/config/aarch64/t-aarch64-linux
@@ -21,8 +21,8 @@
 LIB1ASMSRC   = aarch64/lib1funcs.asm
 LIB1ASMFUNCS = _aarch64_sync_cache_range
 
-AARCH_BE = $(if $(findstring TARGET_BIG_ENDIAN_DEFAULT=1, $(tm_defines)),_be)
-MULTILIB_OSDIRNAMES = mabi.lp64=../lib64$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
-MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu)
+#AARCH_BE = $(if $(findstring TARGET_BIG_ENDIAN_DEFAULT=1, $(tm_defines)),_be)
+#MULTILIB_OSDIRNAMES = mabi.lp64=../lib64$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
+#MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu)
 
-MULTILIB_OSDIRNAMES += mabi.ilp32=../libilp32$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu_ilp32)
+#MULTILIB_OSDIRNAMES += mabi.ilp32=../libilp32$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu_ilp32)
diff --git a/gcc/config/i386/t-linux64 b/gcc/config/i386/t-linux64
index 1171e218578..5e057b7e5db 100644
--- a/gcc/config/i386/t-linux64
+++ b/gcc/config/i386/t-linux64
@@ -32,7 +32,5 @@
 #
 comma=,
 MULTILIB_OPTIONS    = $(subst $(comma),/,$(TM_MULTILIB_CONFIG))
-MULTILIB_DIRNAMES   = $(patsubst m%, %, $(subst /, ,$(MULTILIB_OPTIONS)))
-MULTILIB_OSDIRNAMES = m64=../lib64$(call if_multiarch,:x86_64-linux-gnu)
-MULTILIB_OSDIRNAMES+= m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:i386-linux-gnu)
-MULTILIB_OSDIRNAMES+= mx32=../libx32$(call if_multiarch,:x86_64-linux-gnux32)
+MULTILIB_DIRNAMES = . .
+MULTILIB_OSDIRNAMES = ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
diff --git a/gcc/config/mips/t-linux64 b/gcc/config/mips/t-linux64
index ceb58d3b5f3..43fe2bf28ab 100644
--- a/gcc/config/mips/t-linux64
+++ b/gcc/config/mips/t-linux64
@@ -17,10 +17,6 @@
 # <http://www.gnu.org/licenses/>.
 
 MULTILIB_OPTIONS = mabi=n32/mabi=32/mabi=64
-MULTILIB_DIRNAMES = n32 32 64
-MIPS_EL = $(if $(filter %el, $(firstword $(subst -, ,$(target)))),el)
-MIPS_SOFT = $(if $(strip $(filter MASK_SOFT_FLOAT_ABI, $(target_cpu_default)) $(filter soft, $(with_float))),soft)
-MULTILIB_OSDIRNAMES = \
-	../lib32$(call if_multiarch,:mips64$(MIPS_EL)-linux-gnuabin32$(MIPS_SOFT)) \
-	../lib$(call if_multiarch,:mips$(MIPS_EL)-linux-gnu$(MIPS_SOFT)) \
-	../lib64$(call if_multiarch,:mips64$(MIPS_EL)-linux-gnuabi64$(MIPS_SOFT))
+MULTILIB_DIRNAMES = . . .
+MULTILIB_OSDIRNAMES = ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
+
diff --git a/gcc/config/riscv/t-linux b/gcc/config/riscv/t-linux
index 216d2776a18..e4d817621fc 100644
--- a/gcc/config/riscv/t-linux
+++ b/gcc/config/riscv/t-linux
@@ -1,3 +1,5 @@
 # Only XLEN and ABI affect Linux multilib dir names, e.g. /lib32/ilp32d/
-MULTILIB_DIRNAMES := $(patsubst rv32%,lib32,$(patsubst rv64%,lib64,$(MULTILIB_DIRNAMES)))
-MULTILIB_OSDIRNAMES := $(patsubst lib%,../lib%,$(MULTILIB_DIRNAMES))
+#MULTILIB_DIRNAMES := $(patsubst rv32%,lib32,$(patsubst rv64%,lib64,$(MULTILIB_DIRNAMES)))
+MULTILIB_DIRNAMES := . .
+#MULTILIB_OSDIRNAMES := $(patsubst lib%,../lib%,$(MULTILIB_DIRNAMES))
+MULTILIB_OSDIRNAMES := ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
diff --git a/gcc/config/rs6000/t-linux64 b/gcc/config/rs6000/t-linux64
index 264a7e27524..dc9d440f66b 100644
--- a/gcc/config/rs6000/t-linux64
+++ b/gcc/config/rs6000/t-linux64
@@ -26,10 +26,9 @@
 # MULTILIB_OSDIRNAMES according to what is found on the target.
 
 MULTILIB_OPTIONS    := m64/m32
-MULTILIB_DIRNAMES   := 64 32
+MULTILIB_DIRNAMES   := . .
 MULTILIB_EXTRA_OPTS := 
-MULTILIB_OSDIRNAMES := m64=../lib64$(call if_multiarch,:powerpc64-linux-gnu)
-MULTILIB_OSDIRNAMES += m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:powerpc-linux-gnu)
+MULTILIB_OSDIRNAMES := ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
 
 rs6000-linux.o: $(srcdir)/config/rs6000/rs6000-linux.c
 	$(COMPILE) $<
