[PATCH V3] gcc-runtime: fix C++ header mapping for n32/x32 tune

[<changqing.li@windriver.com>]

From: Changqing Li <changqing.li@windriver.com>

The SDK was unable to find the C++ header pieces correctly since it's
using a generic compiler, not one specifically targeting the multilib
vendor prefix and default tune.  This adds the right mapping to ensure
SDKs work as expected. And fix problem in below configurations:

multilib configuration 1:
MACHINE="qemumips64"
MULTILIBS ?= "multilib:lib32 multilib:libn32"
DEFAULTTUNE_virtclass-multilib-lib32 ?= "mips"
DEFAULTTUNE_virtclass-multilib-libn32 ?= "mips64-n32"
MULTILIB_GLOBAL_VARIANTS_append = " libn32"
require conf/multilib.conf

ignoring nonexistent directory "<path>/sysroots/mips64-poky-linux/usr/include/c++/8.2.0/mips64-poky-linux/32

multilib configuration 2:
MACHINE="qemumips64"
MULTILIBS = 'multilib:lib64 multilib:lib32'
DEFAULTTUNE = 'mips64-n32'
DEFAULTTUNE_virtclass-multilib-lib64 = 'mips64'
DEFAULTTUNE_virtclass-multilib-lib32 = 'mips32r2'
require conf/multilib.conf

For this configuration:
for target gcc-runtime, need to create symlink like mips64-poly-linux --> mips64-poky-linux-gnu32
for target lib64-gcc-runtime, need to create symlink like mips64-poly-linux/32 --> mips64-pokymllib64-linux
in order to avoid conflict during populate_sdk, create symlink for subfoler bits/ext for target gcc-runtime,
this is ugly, but seems no better way to cover all kinds of configuration.

single lib configuration:
MACHINE="qemumips64"
DEFAULTTUNE = "mips64-n32"

Signed-off-by: Changqing Li <changqing.li@windriver.com>
---
 meta/recipes-devtools/gcc/gcc-runtime.inc | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/meta/recipes-devtools/gcc/gcc-runtime.inc b/meta/recipes-devtools/gcc/gcc-runtime.inc
index 3d03d8e..ba767e1 100644
--- a/meta/recipes-devtools/gcc/gcc-runtime.inc
+++ b/meta/recipes-devtools/gcc/gcc-runtime.inc
@@ -86,10 +86,6 @@ do_install () {
 	if [ -d ${D}${infodir} ]; then
 		rmdir --ignore-fail-on-non-empty -p ${D}${infodir}
 	fi
-	if [ "${TARGET_VENDOR_MULTILIB_ORIGINAL}" != "" -a "${TARGET_VENDOR}" != "${TARGET_VENDOR_MULTILIB_ORIGINAL}" ]; then
-		ln -s ${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-${TARGET_OS}
-	fi
-
 }
 
 do_install_append_class-target () {
@@ -98,20 +94,29 @@ do_install_append_class-target () {
 	fi
 
 	if [ "${TARGET_OS}" = "linux-gnun32" ]; then
-		if [ "${MULTILIBS}" != "" ]; then
-			mkdir ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}-pokymllib64-linux
-			ln -s ../${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}-pokymllib64-linux/32
+		if [ "${TARGET_VENDOR_MULTILIB_ORIGINAL}" != "" -a "${TARGET_VENDOR}" != "${TARGET_VENDOR_MULTILIB_ORIGINAL}" ]; then
+			mkdir ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-linux
+			ln -s ../${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-linux/32
+		elif [ "${MULTILIB_VARIANTS}" != "" ]; then
+			mkdir ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR}-linux
+			ln -s ../${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR}-linux/32
 		else
 			ln -s ${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR}-linux
 		fi
-	fi
-	if [ "${TARGET_OS}" = "linux-gnux32" ]; then
-		if [ "${MULTILIBS}" != "" ]; then
-			mkdir ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}-poky-linux
-			ln -s ../${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}-poky-linux/x32
+	elif [ "${TARGET_OS}" = "linux-gnux32" ]; then
+		if [ "${TARGET_VENDOR_MULTILIB_ORIGINAL}" != "" -a "${TARGET_VENDOR}" != "${TARGET_VENDOR_MULTILIB_ORIGINAL}" ]; then
+			mkdir ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-linux
+			ln -s ../${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-linux/x32
+		elif [ "${MULTILIB_VARIANTS}" != "" ]; then
+			mkdir ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR}-linux
+			ln -s ../${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR}-linux/32
 		else
 			ln -s ${TARGET_SYS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR}-linux
 		fi
+	elif [ "${TARGET_VENDOR_MULTILIB_ORIGINAL}" != "" -a "${TARGET_VENDOR}" != "${TARGET_VENDOR_MULTILIB_ORIGINAL}" ]; then
+		mkdir ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-linux
+		ln -s ../${TARGET_SYS}/bits ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-${TARGET_OS}/bits
+		ln -s ../${TARGET_SYS}/ext ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR_MULTILIB_ORIGINAL}-${TARGET_OS}/ext
 	fi
 
 	if [ "${TCLIBC}" != "glibc" ]; then
-- 
2.7.4