openjdk-7: fix compile errors with current poky master (gcc6)morty

Using the current poky master openjdk-7 wasn't buildable. This patch
fixes those problems by adding three more patches to openjdk-7.

These patches basically add/fix GCC6 support. Furthermore the
LDFLAGS_HASH_STYLE variable (which was removed by the
icedtea-crosscompile-fix.patch) is re-introduced and set to "both" for
compatibility reasons.

Following two patches were originally written by Abdur Rehman and taken
from meta-mentor [1]:
	icedtea-flags-to-compile-with-GCC-6.patch
	icedtea-specify-overloaded-variant-of-fmod.patch

[1] https://github.com/MentorEmbedded/meta-mentor

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Jose Diaz de Grenu <Jose.DiazdeGrenu@digi.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/recipes-core/openjdk/patches-openjdk-7/icedtea-flags-to-compile-with-GCC-6.patch b/recipes-core/openjdk/patches-openjdk-7/icedtea-flags-to-compile-with-GCC-6.patch
new file mode 100644
index 0000000..062c6bf
--- /dev/null
+++ b/recipes-core/openjdk/patches-openjdk-7/icedtea-flags-to-compile-with-GCC-6.patch
@@ -0,0 +1,74 @@
+From 732aab80cb1505ef2f4d8a6e141f835aa9f6d985 Mon Sep 17 00:00:00 2001
+From: Abdur Rehman <abdur_rehman@mentor.com>
+Date: Mon, 24 Oct 2016 20:24:32 +0500
+Subject: [PATCH] icedtea flags to compile with GCC 6
+
+Upstream bug filed here:
+https://bugs.openjdk.java.net/browse/JDK-8163032
+
+This patch combines the changes introduced by following commits:
+* http://hg.openjdk.java.net/jdk7u/jdk7u/hotspot/rev/e34324d73cd5
+* http://hg.openjdk.java.net/jdk7u/jdk7u/jdk/rev/9e1264f51bae
+
+Upstream-Status: Backport
+
+Signed-off-by: Abdur Rehman <abdur_rehman@mentor.com>
+---
+ openjdk/hotspot/make/linux/makefiles/gcc.make | 7 +++++++
+ openjdk/jdk/make/common/Defs-linux.gmk        | 8 +++++++-
+ 2 files changed, 14 insertions(+), 1 deletion(-)
+
+diff --git openjdk/hotspot/make/linux/makefiles/gcc.make openjdk/hotspot/make/linux/makefiles/gcc.make
+index 4ef0e49..bca3c5c 100644
+--- openjdk/hotspot/make/linux/makefiles/gcc.make
++++ openjdk/hotspot/make/linux/makefiles/gcc.make
+@@ -83,6 +83,7 @@ ifeq ($(TYPE),SHARK)
+ CFLAGS += $(LIBFFI_CFLAGS)
+ CFLAGS += $(LLVM_CFLAGS)
+ endif
++CFLAGS += -std=gnu++98
+ CFLAGS += $(VM_PICFLAG)
+ CFLAGS += -fno-rtti
+ CFLAGS += -fno-exceptions
+@@ -93,6 +94,12 @@ CFLAGS += -fcheck-new
+ ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
+ CFLAGS += -fvisibility=hidden
+ endif
++# GCC 6 has more aggressive dead-store elimination which causes the VM to crash
++# It also optimises away null pointer checks which are still needed.
++# We turn both of these optimisations off.
++ifneq "$(shell expr \( $(CC_VER_MAJOR) \>= 6 \))" "0"
++CFLAGS += -fno-delete-null-pointer-checks -fno-lifetime-dse
++endif
+ 
+ ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
+ ARCHFLAG/i486    = -m32 -march=i586
+diff --git openjdk/jdk/make/common/Defs-linux.gmk openjdk/jdk/make/common/Defs-linux.gmk
+index f64042c..727593c 100644
+--- openjdk/jdk/make/common/Defs-linux.gmk
++++ openjdk/jdk/make/common/Defs-linux.gmk
+@@ -217,6 +217,12 @@ CFLAGS_REQUIRED_ppc64   += -fno-tree-vectorize
+   CFLAGS_REQUIRED       =  $(CFLAGS_REQUIRED_$(ARCH))
+   LDFLAGS_COMMON        += $(LDFLAGS_COMMON_$(ARCH))
+ endif
++# GCC 6 has more aggressive dead-store elimination which causes the VM to crash
++# It also optimises away null pointer checks which are still needed.
++# We turn both of these optimisations off.
++ifeq ($(shell $(EXPR) $(CC_MAJORVER) \>= 6 ),1)
++ CFLAGS_REQUIRED += -fno-delete-null-pointer-checks -fno-lifetime-dse
++endif
+ 
+ # If this is a --hash-style=gnu system, use --hash-style=both
+ #   The gnu .hash section won't work on some Linux systems like SuSE 10.
+@@ -281,7 +287,7 @@ CFLAGS_OPT      = $(CC_OPT)
+ CFLAGS_DBG      = $(DEBUG_FLAG)
+ CFLAGS_COMMON += $(CFLAGS_REQUIRED)
+ 
+-CXXFLAGS_COMMON = $(GLOBAL_KPIC) -DCC_NOEX $(GCC_WARNINGS)
++CXXFLAGS_COMMON = -std=gnu++98 $(GLOBAL_KPIC) -DCC_NOEX $(GCC_WARNINGS)
+ CXXFLAGS_OPT   = $(CC_OPT)
+ CXXFLAGS_DBG   = $(DEBUG_FLAG)
+ CXXFLAGS_COMMON += $(CFLAGS_REQUIRED)
+-- 
+2.8.1
+