Add -fno-strict-aliasing to compiler options

Add this option to ARM, PPC linux, and X86 linux. This is related to Issue eclipse-openj9/openj9#2872 Signed-off-by: Peter Bain <[email protected]>
pdbain-ibm · Nov 13, 2018 · 5315047 · 5315047
1 parent abd36d3
commit 5315047
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/omrmakefiles/rules.linux.mk b/omrmakefiles/rules.linux.mk
@@ -187,21 +187,25 @@ ifeq (x86,$(OMR_HOST_ARCH))
         GLOBAL_CXXFLAGS+=-m32 -msse2 -I/usr/include/nptl
         GLOBAL_CPPFLAGS+=-DJ9X86
     endif
+    GLOBAL_CFLAGS+=-fno-strict-aliasing
+    GLOBAL_CXXFLAGS+=-fno-strict-aliasing
 
 else ifeq (aarch64,$(OMR_HOST_ARCH))
-    GLOBAL_CFLAGS+=-march=armv8-a+simd -Wno-unused-but-set-variable
-    GLOBAL_CXXFLAGS+=-march=armv8-a+simd -Wno-unused-but-set-variable
+    GLOBAL_CFLAGS+=-march=armv8-a+simd -Wno-unused-but-set-variable -fno-strict-aliasing
+    GLOBAL_CXXFLAGS+=-march=armv8-a+simd -Wno-unused-but-set-variable -fno-strict-aliasing
     GLOBAL_CPPFLAGS+=-DJ9AARCH64 -DAARCH64GNU -DAARCH64 -DFIXUP_UNALIGNED -Wno-unused-but-set-variable
 
 else
     ifeq (arm,$(OMR_HOST_ARCH))
-        GLOBAL_CFLAGS+=$(ARM_ARCH_FLAGS) -Wno-unused-but-set-variable
+        GLOBAL_CFLAGS+=$(ARM_ARCH_FLAGS) -Wno-unused-but-set-variable -fno-strict-aliasing
         GLOBAL_CPPFLAGS+=-DJ9ARM -DARMGNU -DARM -DFIXUP_UNALIGNED $(ARM_ARCH_FLAGS) -Wno-unused-but-set-variable
     else
         ifeq (ppc,$(OMR_HOST_ARCH))
             GLOBAL_CPPFLAGS+=-DLINUXPPC
 
             ifeq (gcc,$(OMR_TOOLCHAIN))
+                GLOBAL_CFLAGS+=-fno-strict-aliasing
+                GLOBAL_CXXFLAGS+=-fno-strict-aliasing
                 ifeq (1,$(OMR_ENV_DATA64))
                     GLOBAL_CFLAGS+=-m64
                     GLOBAL_CXXFLAGS+=-m64