[OE-core] [PATCH] uninative: rebuild uninative for gcc 4.8 and 4.9

[Ed Bartosh]

Some c++ libraries fail to build if uninative is built
with gcc 5.x and host gcc version is either 4.8 or 4.9.

The issue should be solved by making separate uninative sstate
directory structure sstate-cache/universal-<gcc version> for host gcc
versions 4.8 and 4.9. This causes rebuilds of uninative if host gcc
is either 4.8 or 4.9 and it doesn't match gcc version used to build
uninative.

[YOCTO #10441]

Signed-off-by: Ed Bartosh <ed.bartosh at linux.intel.com>
---
 meta/classes/uninative.bbclass | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/meta/classes/uninative.bbclass b/meta/classes/uninative.bbclass
index 89cec07..35c1496 100644
--- a/meta/classes/uninative.bbclass
+++ b/meta/classes/uninative.bbclass
@@ -95,11 +95,29 @@ python uninative_event_enable() {
     enable_uninative(d)
 }
 
+def gcc_version(d):
+    compiler = d.getVar("BUILD_CC", True)
+    retval, output = oe.utils.getstatusoutput("%s --version" % compiler)
+    if retval:
+        bb.fatal("Error running %s --version: %s" % (compiler, output))
+
+    import re
+    match = re.match(".* (\d\.\d)\.\d .*", output.split('\n')[0])
+    if not match:
+        bb.fatal("Can't get compiler version from %s --version output" % compiler)
+
+    version = match.group(1)
+    return "-%s" % version if version in ("4.8", "4.9") else ""
+
 def enable_uninative(d):
     loader = d.getVar("UNINATIVE_LOADER", True)
     if os.path.exists(loader):
         bb.debug(2, "Enabling uninative")
-        d.setVar("NATIVELSBSTRING", "universal")
+        gcc_ver = d.getVar("GCC_VERSION", True)
+        if not gcc_ver:
+            gcc_ver = gcc_version(d)
+            d.setVar("GCC_VERSION", gcc_ver)
+        d.setVar("NATIVELSBSTRING", "universal%s" % gcc_ver)
         d.appendVar("SSTATEPOSTUNPACKFUNCS", " uninative_changeinterp")
         d.prependVar("PATH", "${STAGING_DIR}-uninative/${BUILD_ARCH}-linux${bindir_native}:")
 
-- 
2.1.4