[OE-core] [PATCH v3 3/8] -cross recipes: ignore TARGET_ARCH sstate hash

[Patrick Ohly]

"yocto-compat-layer.py --machines" showed that shared packages like
gcc-cross-powerpc64 have a sstate signature that depends on
TUNEFLAGS. As a result, there are unnecessary rebuilds and potential
conflicts in a multiconfig.

That's due to the way how TARGET_ARCH is set. Richard Purdie suggested
setting TARGET_ARCH[vardepvalue] as fix, which works. It would be
shorter to do that in cross.inc instead of repeating the relevant line
in different recipes, but Richard was concerned about potential
side-effects in other usages of cross.inc.

TARGET_GOARM as used in go.inc is still causing signature differences
for go-cross-powerpc64 and machines b4420qds-64b and p5020ds-64b. This
needs further investigation.

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 meta/recipes-devtools/binutils/binutils-cross.inc | 3 +++
 meta/recipes-devtools/gcc/gcc-cross.inc           | 3 +++
 meta/recipes-devtools/gdb/gdb-cross.inc           | 3 +++
 meta/recipes-devtools/go/go-cross.inc             | 3 +++
 4 files changed, 12 insertions(+)

diff --git a/meta/recipes-devtools/binutils/binutils-cross.inc b/meta/recipes-devtools/binutils/binutils-cross.inc
index 5e6f468..02ec891 100644
--- a/meta/recipes-devtools/binutils/binutils-cross.inc
+++ b/meta/recipes-devtools/binutils/binutils-cross.inc
@@ -4,6 +4,9 @@ PROVIDES = "virtual/${TARGET_PREFIX}binutils"
 PN = "binutils-cross-${TARGET_ARCH}"
 BPN = "binutils"
 
+# Ignore how TARGET_ARCH is computed.
+TARGET_ARCH[vardepvalue] = "${TARGET_ARCH}"
+
 INHIBIT_DEFAULT_DEPS = "1"
 INHIBIT_AUTOTOOLS_DEPS = "1"
 
diff --git a/meta/recipes-devtools/gcc/gcc-cross.inc b/meta/recipes-devtools/gcc/gcc-cross.inc
index bb5f7a0..c5c1645 100644
--- a/meta/recipes-devtools/gcc/gcc-cross.inc
+++ b/meta/recipes-devtools/gcc/gcc-cross.inc
@@ -11,6 +11,9 @@ python () {
 
 PN = "gcc-cross-${TARGET_ARCH}"
 
+# Ignore how TARGET_ARCH is computed.
+TARGET_ARCH[vardepvalue] = "${TARGET_ARCH}"
+
 require gcc-configure-common.inc
 
 # While we want the 'gnu' hash style, we explicitly set it to sysv here to
diff --git a/meta/recipes-devtools/gdb/gdb-cross.inc b/meta/recipes-devtools/gdb/gdb-cross.inc
index d92f31f..ebe329f 100644
--- a/meta/recipes-devtools/gdb/gdb-cross.inc
+++ b/meta/recipes-devtools/gdb/gdb-cross.inc
@@ -21,6 +21,9 @@ GDBPROPREFIX = ""
 PN = "gdb-cross-${TARGET_ARCH}"
 BPN = "gdb"
 
+# Ignore how TARGET_ARCH is computed.
+TARGET_ARCH[vardepvalue] = "${TARGET_ARCH}"
+
 inherit cross
 inherit gettext
 
diff --git a/meta/recipes-devtools/go/go-cross.inc b/meta/recipes-devtools/go/go-cross.inc
index 9b49738..8fa09b7 100644
--- a/meta/recipes-devtools/go/go-cross.inc
+++ b/meta/recipes-devtools/go/go-cross.inc
@@ -4,6 +4,9 @@ DEPENDS += "gcc-cross-${TARGET_ARCH}"
 
 PN = "go-cross-${TARGET_ARCH}"
 
+# Ignore how TARGET_ARCH is computed.
+TARGET_ARCH[vardepvalue] = "${TARGET_ARCH}"
+
 # go-cross is built once per target architecture, and thus must not
 # depend on the tune-specific libgcc.
 DEPENDS_remove = "libgcc"
-- 
git-series 0.9.1