[OE-core] [PATCH 1/1] Use TUNE_CCARGS for target compilation

[Peter Seebach]

The initial gcc configuration is using TARGET_CFLAGS, but this is
probably not what is intended, because TARGET_CFLAGS doesn't include
any architecture-specific flags.

For PPC64, it's possible to end up with gcc configured to pass -a64 to
the assembler, but be itself getting invoked without -m64, which can result
in alignment problems in generated code. Solution: Instead of setting
CFLAGS_FOR_TARGET to TARGET_CFLAGS, set it to TARGET_CFLAGS + TUNE_CCARGS.

However, for crosssdk cases, we need to prevent that from having any
effect; this can be done by emptying out the TUNE_*ARGS flags in the
crosssdk bbclass, because there is no "target tune" in crosssdk cases.

Signed-off-by: Peter Seebach <peter.seebach at windriver.com>
---
 meta/classes/crosssdk.bbclass                      | 4 ++++
 meta/recipes-devtools/gcc/gcc-configure-common.inc | 2 +-
 meta/recipes-devtools/gcc/gcc-cross.inc            | 2 +-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/meta/classes/crosssdk.bbclass b/meta/classes/crosssdk.bbclass
index 7315c38..ccff3ce 100644
--- a/meta/classes/crosssdk.bbclass
+++ b/meta/classes/crosssdk.bbclass
@@ -6,6 +6,10 @@ PACKAGE_ARCH = "${SDK_ARCH}"
 python () {
 	# set TUNE_PKGARCH to SDK_ARCH
 	d.setVar('TUNE_PKGARCH', d.getVar('SDK_ARCH', True))
+	# We're not running a 'target', so clear these...
+	d.setVar('TUNE_CCARGS', '')
+	d.setVar('TUNE_LDARGS', '')
+	d.setVar('TUNE_ASARGS', '')
 }
 
 STAGING_DIR_TARGET = "${STAGING_DIR}/${SDK_ARCH}-${SDKPKGSUFFIX}${SDK_VENDOR}-${SDK_OS}"
diff --git a/meta/recipes-devtools/gcc/gcc-configure-common.inc b/meta/recipes-devtools/gcc/gcc-configure-common.inc
index 45b3f15..4b4d91d 100644
--- a/meta/recipes-devtools/gcc/gcc-configure-common.inc
+++ b/meta/recipes-devtools/gcc/gcc-configure-common.inc
@@ -120,7 +120,7 @@ do_configure () {
 	export CPPFLAGS_FOR_BUILD="${BUILD_CPPFLAGS}"
 	export CXXFLAGS_FOR_BUILD="${BUILD_CXXFLAGS}"
 	export LDFLAGS_FOR_BUILD="${BUILD_LDFLAGS}"
-	export CFLAGS_FOR_TARGET="${TARGET_CFLAGS}"
+	export CFLAGS_FOR_TARGET="${TARGET_CFLAGS} ${TUNE_CCARGS}"
 	export CPPFLAGS_FOR_TARGET="${TARGET_CPPFLAGS}"
 	export CXXFLAGS_FOR_TARGET="${TARGET_CXXFLAGS}"
 	export LDFLAGS_FOR_TARGET="${TARGET_LDFLAGS}"
diff --git a/meta/recipes-devtools/gcc/gcc-cross.inc b/meta/recipes-devtools/gcc/gcc-cross.inc
index aa10633..b6020a4 100644
--- a/meta/recipes-devtools/gcc/gcc-cross.inc
+++ b/meta/recipes-devtools/gcc/gcc-cross.inc
@@ -43,7 +43,7 @@ do_compile () {
 	export LD_FOR_TARGET="${TARGET_SYS}-ld"
 	export NM_FOR_TARGET="${TARGET_SYS}-nm"
 	export CC_FOR_TARGET="${CCACHE} ${TARGET_SYS}-gcc"
-	export CFLAGS_FOR_TARGET="${TARGET_CFLAGS}"
+	export CFLAGS_FOR_TARGET="${TARGET_CFLAGS} ${TUNE_CCARGS}"
 	export CPPFLAGS_FOR_TARGET="${TARGET_CPPFLAGS}"
 	export CXXFLAGS_FOR_TARGET="${TARGET_CXXFLAGS}"
 	export LDFLAGS_FOR_TARGET="${TARGET_LDFLAGS}"
-- 
2.3.1