gcc: Enable SPE & AltiVec generation on powepc*linux target.

[ADT bug #5761] -- https://bugzilla.yoctoproject.org/show_bug.cgi?id=5761

Also this patch adds symlinks to libgcc such that a GCC configured
by passing the target parameter without LIBCEXTENSION and ABIEXTENSION
specifiers to find the correct startup files from a libgcc configured
with these variables.

Signed-off-by: Alexandru-Cezar Sardan <alexandru.sardan@freescale.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

3 files changed, 66 insertions, 1 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.8.inc b/meta/recipes-devtools/gcc/gcc-4.8.inc
index fdd0c12ae0..f5e583d766 100644
--- a/meta/recipes-devtools/gcc/gcc-4.8.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.8.inc
@@ -69,6 +69,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
 	   file://0046-libatomic-deptracking.patch \
 	   file://0047-repomembug.patch \
 	   file://0048-PR58854_fix_arm_apcs_epilogue.patch \
+	   file://0049-Enable-SPE-AltiVec-generation-on-powepc-linux-target.patch \ 
 	  "
 SRC_URI[md5sum] = "a3d7d63b9cb6b6ea049469a0c4a43c9d"
 SRC_URI[sha256sum] = "09dc2276c73424bbbfda1dbddc62bbbf900c9f185acf7f3e1d773ce2d7e3cdc8"
diff --git a/meta/recipes-devtools/gcc/gcc-4.8/0049-Enable-SPE-AltiVec-generation-on-powepc-linux-target.patch b/meta/recipes-devtools/gcc/gcc-4.8/0049-Enable-SPE-AltiVec-generation-on-powepc-linux-target.patch
new file mode 100644
index 0000000000..b98f8ff01d
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.8/0049-Enable-SPE-AltiVec-generation-on-powepc-linux-target.patch
@@ -0,0 +1,42 @@
+From 9e0e19eac2562f73858602fe26e2044eb8b20c47 Mon Sep 17 00:00:00 2001
+From: Alexandru-Cezar Sardan <alexandru.sardan@freescale.com>
+Date: Wed, 5 Feb 2014 16:52:31 +0200
+Subject: [PATCH] Enable SPE & AltiVec generation on powepc*linux target
+
+When is configured with --target=powerpc-linux, the resulting GCC will 
+not be able to generate code for SPE targets (e500v1/v2).
+GCC configured with --target=powerpc-linuxspe will not be able to
+generate AltiVec instructions (for e6500).
+This patch modifies the configured file such that SPE or AltiVec code
+can be generated when gcc is configured with --target=powerpc-linux.
+The ABI and speciffic instructions can be selected through the
+"-mabi=spe or -mabi=altivec" and the "-mspe or -maltivec" parameters.
+
+Upstream-Status: Inappropriate [configuration]
+
+Signed-off-by: Alexandru-Cezar Sardan <alexandru.sardan@freescale.com>
+---
+ gcc/config.gcc |    7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/gcc/config.gcc b/gcc/config.gcc
+index cb7a94e..d392c2b 100644
+--- a/gcc/config.gcc
++++ b/gcc/config.gcc
+@@ -2068,7 +2068,12 @@ powerpc-*-rtems*)
+ 	tmake_file="rs6000/t-fprules rs6000/t-rtems t-rtems rs6000/t-ppccomm"
+ 	;;
+ powerpc*-*-linux*)
+-	tm_file="${tm_file} dbxelf.h elfos.h freebsd-spec.h rs6000/sysv4.h"
++	case ${target} in
++	    powerpc*-*-linux*spe* | powerpc*-*-linux*altivec*)
++		tm_file="${tm_file} dbxelf.h elfos.h freebsd-spec.h rs6000/sysv4.h" ;;
++	    *)
++		tm_file="${tm_file} dbxelf.h elfos.h freebsd-spec.h rs6000/sysv4.h rs6000/linuxaltivec.h rs6000/linuxspe.h rs6000/e500.h" ;;
++	esac
+ 	extra_options="${extra_options} rs6000/sysv4.opt"
+ 	tmake_file="rs6000/t-fprules rs6000/t-ppcos ${tmake_file} rs6000/t-ppccomm"
+ 	case ${target} in
+-- 
+1.7.9.5
+
diff --git a/meta/recipes-devtools/gcc/libgcc.inc b/meta/recipes-devtools/gcc/libgcc.inc
index fe98238677..b185660ffd 100644
--- a/meta/recipes-devtools/gcc/libgcc.inc
+++ b/meta/recipes-devtools/gcc/libgcc.inc
@@ -17,7 +17,8 @@ FILES_${PN}-dev = " \
   ${libdir}/${TARGET_SYS}/${BINV}/32 \
   ${libdir}/${TARGET_SYS}/${BINV}/x32 \
   ${libdir}/${TARGET_SYS}/${BINV}/n32 \
-  ${libdir}/${TARGET_SYS}/${BINV}/libgcc*"
+  ${libdir}/${TARGET_SYS}/${BINV}/libgcc* \
+  ${@base_conditional('TARGET_SYS_NO_EXTENSION', '${TARGET_SYS}', '', '${libdir}/${TARGET_SYS_NO_EXTENSION}', d)}"
 FILES_libgcov-dev = " \
   ${libdir}/${TARGET_SYS}/${BINV}/libgcov.a \
   "
@@ -141,3 +142,24 @@ python do_multilib_install() {
             os.unlink(dest)
         os.symlink(src, dest)
 }
+
+addtask extra_symlinks after do_multilib_install before do_package do_populate_sysroot
+python do_extra_symlinks() {
+    targetsysnoext = d.getVar('TARGET_SYS_NO_EXTENSION', True)
+
+    if targetsysnoext != d.getVar('TARGET_SYS', True):
+        dest = d.getVar('D', True) + d.getVar('libdir', True) + '/' + targetsysnoext
+        src = d.getVar('TARGET_SYS', True)
+        if not os.path.lexists(dest):
+            os.symlink(src, dest)
+}
+
+python () {
+    targetsysnoext = d.getVar('TARGET_SYS', True)
+
+    for suffix in [d.getVar('ABIEXTENSION', True), d.getVar('LIBCEXTENSION', True)]:
+        if suffix and targetsysnoext.endswith(suffix):
+            targetsysnoext = targetsysnoext[:-len(suffix)]
+
+    d.setVar('TARGET_SYS_NO_EXTENSION', targetsysnoext)
+}