[oe] [meta-java][PATCH 8/9] openjdk-8: gcc-8 fix #3: working binaries

[André Draszik]

From: André Draszik <andre.draszik at jci.com>

Similar to the existing gcc-6 and gcc-7 support, we need to
add the same specific compiler flags to avoid miscompilation
on gcc-8:
  -fno-lifetime-dse
  -fno-delete-null-pointer-checks

With this,
    bitbake -c testimage openjdk-8-test-image
works again for x86_64 and aarch64:
RESULTS:
RESULTS - ping.PingTest.test_ping - Testcase 964: PASSED (0.12s)
RESULTS - ssh.SSHTest.test_ssh - Testcase 224: PASSED (1.20s)
RESULTS - java.JavaTest.test_java_exists - Testcase -1: PASSED (0.15s)
RESULTS - java.JavaTest.test_java_jar_comp_mode - Testcase -1: PASSED (41.98s)
RESULTS - java.JavaTest.test_java_jar_int_mode - Testcase -1: PASSED (1.76s)
RESULTS - java.JavaTest.test_java_jar_works - Testcase -1: PASSED (2.13s)
RESULTS - java.JavaTest.test_java_version - Testcase -1: PASSED (1.51s)
RESULTS - javac.JavacTest.test_javac_exists - Testcase -1: PASSED (0.11s)
RESULTS - javac.JavacTest.test_javac_works - Testcase -1: PASSED (17.64s)
SUMMARY:
openjdk-8-test-image () - Ran 9 tests in 67.112s
openjdk-8-test-image - OK - All required tests passed

NOTE: armv5e still doesn't work with gcc v8, and other arches
weren't tested.

Signed-off-by: André Draszik <andre.draszik at jci.com>
---
 recipes-core/openjdk/openjdk-8-common.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/recipes-core/openjdk/openjdk-8-common.inc b/recipes-core/openjdk/openjdk-8-common.inc
index 77d905d..aaa4483 100644
--- a/recipes-core/openjdk/openjdk-8-common.inc
+++ b/recipes-core/openjdk/openjdk-8-common.inc
@@ -216,7 +216,7 @@ EXTRA_OECONF_append = "\
 # of these changes.
 FLAGS_GCC6 = "-fno-lifetime-dse -fno-delete-null-pointer-checks"
 FLAGS_GCC7 = "-fno-lifetime-dse -fno-delete-null-pointer-checks"
-FLAGS_GCC8 = "-Wno-error=return-type"
+FLAGS_GCC8 = "-fno-lifetime-dse -fno-delete-null-pointer-checks -Wno-error=return-type"
 
 # All supported cross compilers support the compiler flags that were
 # added to make compilation with gcc6 work. But the host compiler for
-- 
2.18.0