gcc-linaro-7.1: add ILP32 patches for correct triplet

The GNU name proposed for ILP32 used to be
  aarch64_ilp32-linux-gnu
and then:
  aarch64-linux-gnuilp32
but finally:
  aarch64-linux-gnu_ilp32

These patches are a continuation of the effort to correctly
establish the right triplet.

More information about ARM64 ILP32 can be found here:
* https://wiki.linaro.org/Platform/arm64-ilp32
* https://wiki.debian.org/Arm64ilp32Port

Change-Id: I560af755d69efe0eb3d89ecf7db4b4453eaab5e0
Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org>

3 files changed, 102 insertions, 1 deletions

diff --git a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1.inc b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1.inc
index 92dc327d..602dbe79 100644
--- a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1.inc
+++ b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1.inc
@@ -55,7 +55,6 @@ SRC_URI = "\
            file://0026-Avoid-using-libdir-from-.la-which-usually-points-to-.patch \
            file://0027-export-CPP.patch \
            file://0028-Enable-SPE-AltiVec-generation-on-powepc-linux-target.patch \
-           file://0029-Disable-the-MULTILIB_OSDIRNAMES-and-other-multilib-o.patch \
            file://0030-Ensure-target-gcc-headers-can-be-included.patch \
            file://0031-gcc-4.8-won-t-build-with-disable-dependency-tracking.patch \
            file://0032-Don-t-search-host-directory-during-relink-if-inst_pr.patch \
@@ -74,6 +73,8 @@ SRC_URI = "\
            file://0045-Link-libgcc-using-LDFLAGS-not-just-SHLIB_LDFLAGS.patch \
            file://0046-libgcc_s-Use-alias-for-__cpu_indicator_init-instead-.patch \
            file://0047-sync-gcc-stddef.h-with-musl.patch \
+           file://add-gcc-ilp32-default-support.patch \
+           file://fix-gcc-multilib-for-ilp32-default.patch \
            ${BACKPORTS} \
 "
 BACKPORTS = "\
diff --git a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1/add-gcc-ilp32-default-support.patch b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1/add-gcc-ilp32-default-support.patch
new file mode 100644
index 00000000..4c231a19
--- /dev/null
+++ b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1/add-gcc-ilp32-default-support.patch
@@ -0,0 +1,61 @@
+From ebfcbd5ace44eb4db1a8e0a0e0622ff053c69e31 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Daniel=20D=C3=ADaz?= <daniel.diaz@linaro.org>
+Date: Wed, 11 Oct 2017 11:27:58 -0500
+Subject: [PATCH 1/2] Add gcc ilp32 default support
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This patch comes from Wookey:
+  https://people.linaro.org/~wookey/ilp32/patches/gcc-ilp32-default-support.patch
+
+Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org>
+---
+ gcc/config.gcc | 22 ++++++++++++++++------
+ 1 file changed, 16 insertions(+), 6 deletions(-)
+
+diff --git a/gcc/config.gcc b/gcc/config.gcc
+index e8aaf2d..72522d0 100644
+--- a/gcc/config.gcc
++++ b/gcc/config.gcc
+@@ -518,11 +518,14 @@ aarch64*-*-*)
+ 	tm_p_file="${tm_p_file} arm/aarch-common-protos.h"
+ 	case ${with_abi} in
+ 	"")
+-		if test "x$with_multilib_list" = xilp32; then
++		case ${target} in
++		aarch64*-*-*_ilp32)
+ 			tm_file="aarch64/biarchilp32.h ${tm_file}"
+-		else
++			;;
++		*)
+ 			tm_file="aarch64/biarchlp64.h ${tm_file}"
+-		fi
++			;;
++		esac
+ 		;;
+ 	ilp32)
+ 		tm_file="aarch64/biarchilp32.h ${tm_file}"
+@@ -971,9 +974,16 @@ aarch64*-*-linux*)
+ 	esac
+ 	aarch64_multilibs="${with_multilib_list}"
+ 	if test "$aarch64_multilibs" = "default"; then
+-		# TODO: turn on ILP32 multilib build after its support is mature.
+-		# aarch64_multilibs="lp64,ilp32"
+-		aarch64_multilibs="lp64"
++		case $target in
++		aarch64*_ilp32*)
++			aarch64_multilibs="ilp32"
++			;;
++		aarch64*)
++			# TODO: turn on ILP32 multilib build after its support is mature.
++			# aarch64_multilibs="lp64,ilp32"
++			aarch64_multilibs="lp64"
++			;;
++		esac
+ 	fi
+ 	aarch64_multilibs=`echo $aarch64_multilibs | sed -e 's/,/ /g'`
+ 	for aarch64_multilib in ${aarch64_multilibs}; do
+-- 
+2.7.4
+
diff --git a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1/fix-gcc-multilib-for-ilp32-default.patch b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1/fix-gcc-multilib-for-ilp32-default.patch
new file mode 100644
index 00000000..8a71facb
--- /dev/null
+++ b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-7.1/fix-gcc-multilib-for-ilp32-default.patch
@@ -0,0 +1,39 @@
+From 50a45089ace8221682852d1c8401aad7824b9ec1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Daniel=20D=C3=ADaz?= <daniel.diaz@linaro.org>
+Date: Wed, 11 Oct 2017 11:45:15 -0500
+Subject: [PATCH 2/2] Fix gcc multilib for ilp32 default
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This comes from Wookey:
+  https://people.linaro.org/~wookey/ilp32/patches/gcc-fixup-multilib-patch-for-ilp32-default.patch
+on top of Debian's gcc-multiarch.diff.
+
+Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org>
+---
+ gcc/config/aarch64/t-aarch64-linux | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/gcc/config/aarch64/t-aarch64-linux b/gcc/config/aarch64/t-aarch64-linux
+index ab064ab..38b33f6 100644
+--- a/gcc/config/aarch64/t-aarch64-linux
++++ b/gcc/config/aarch64/t-aarch64-linux
+@@ -22,7 +22,12 @@ LIB1ASMSRC   = aarch64/lib1funcs.asm
+ LIB1ASMFUNCS = _aarch64_sync_cache_range
+ 
+ AARCH_BE = $(if $(findstring TARGET_BIG_ENDIAN_DEFAULT=1, $(tm_defines)),_be)
++ifneq (,$(findstring _ilp32,$(target)))
+ MULTILIB_OSDIRNAMES = mabi.lp64=../lib64$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
++MULTILIB_OSDIRNAMES += mabi.ilp32=../lib$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu_ilp32)
++MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu_ilp32)
++else
++MULTILIB_OSDIRNAMES = mabi.lp64=../lib$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
++MULTILIB_OSDIRNAMES += mabi.ilp32=../libilp32$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu_ilp32)
+ MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu)
+-
+-MULTILIB_OSDIRNAMES += mabi.ilp32=../libilp32
++endif
+-- 
+2.7.4
+