openjdk-8: make GCC6 happy

GCC 6 sets the default C++ standard to C++14 and introduces dead store
elimination by default. OpenJDK 8 is not ready for either of these
changes, so set the C++ standard back to gnu++98 and disable dead
store elimination.

Switched to using --with-extra-cflags, cxxflags, and ldflags. The added
patch fixes building when using those flags, and are needed to get
CFLAGS into the JDK build in the native case.

Signed-off-by: Daniel McGregor <daniel.mcgregor@vecima.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 4 insertions, 0 deletions

diff --git a/recipes-core/openjdk/openjdk-8-common.inc b/recipes-core/openjdk/openjdk-8-common.inc
index 70bd40c..dd3d397 100644
--- a/recipes-core/openjdk/openjdk-8-common.inc
+++ b/recipes-core/openjdk/openjdk-8-common.inc
@@ -236,3 +236,7 @@ EXTRA_OECONF_append = "\
         --with-build-number=${OPENJDK_BUILD_NUMBER} \
         --with-update-version=${OPENJDK_UPDATE_VERSION} \
 "
+
+CFLAGS_append = " -fno-lifetime-dse -fno-delete-null-pointer-checks"
+CXXFLAGS_append = " -fno-lifetime-dse -fno-delete-null-pointer-checks"
+CXX_append = " -std=gnu++98"