diff --git a/configure/os/CONFIG.Common.eldk42-ppc4xxFP b/configure/os/CONFIG.Common.eldk42-ppc4xxFP
index 001b9df7a..77b2375d9 100644
--- a/configure/os/CONFIG.Common.eldk42-ppc4xxFP
+++ b/configure/os/CONFIG.Common.eldk42-ppc4xxFP
@@ -11,6 +11,8 @@ ELDK=/opt/eldk-4.2
 GNU_TARGET=ppc_4xxFP
 GNU_DIR=$(ELDK)/usr
 
+ARCH_DEP_CFLAGS += -fno-strict-aliasing
+
 # This cross tool chain is installed in a somehow weired way
 # Without the following lines it does not work on RHEL7
 # but it worked on SL6
diff --git a/configure/os/CONFIG.Common.vxWorksCommon b/configure/os/CONFIG.Common.vxWorksCommon
index 2d5d95739..e45928d2c 100644
--- a/configure/os/CONFIG.Common.vxWorksCommon
+++ b/configure/os/CONFIG.Common.vxWorksCommon
@@ -161,7 +161,12 @@ OPT_CXXFLAGS_YES = -O2
 
 #--------------------------------------------------
 # code flags
-CODE_CFLAGS =
+CODE_CPPFLAGS_6.6 = -fno-strict-aliasing
+CODE_CPPFLAGS_6.7 = -fno-strict-aliasing
+CODE_CPPFLAGS_6.8 = -fno-strict-aliasing
+CODE_CPPFLAGS_6.9 = -fno-strict-aliasing
+CODE_CPPFLAGS_6 = $(CODE_CPPFLAGS_$(VXWORKS_VERSION))
+CODE_CPPFLAGS += $(CODE_CPPFLAGS_$(VXWORKS_MAJOR_VERSION))
 #
 # For vxWorks versions before 6.3 we need this g++ compiler flag
 CODE_CXXFLAGS_5 = -fno-implicit-templates
@@ -169,7 +174,7 @@ CODE_CXXFLAGS_6.0 = -fno-implicit-templates
 CODE_CXXFLAGS_6.1 = -fno-implicit-templates
 CODE_CXXFLAGS_6.2 = -fno-implicit-templates
 CODE_CXXFLAGS_6 = $(CODE_CXXFLAGS_$(VXWORKS_VERSION))
-CODE_CXXFLAGS = $(CODE_CXXFLAGS_$(VXWORKS_MAJOR_VERSION))
+CODE_CXXFLAGS += $(CODE_CXXFLAGS_$(VXWORKS_MAJOR_VERSION))
 
 #--------------------------------------------------
 # no shared libs for vxWorks