Only build attributeOverride if compiler supports -std=gnu++11

GCC prior to 4.8 doesn't support -std=gnu++11, which the attributeOverride
tool requires to build.

Resolves:open-power/op-build/pull/947
Change-Id: I53ad31b56dd90c2cd77f5ca1f91b46e519cdfe48
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/38131
Reviewed-by: Prachi Gupta <pragupta@us.ibm.com>
Reviewed-by: Matthew A. Ploetz <maploetz@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/build/mkrules/cc.rules.mk

@@ -5,7 +5,9 @@
 #
 # OpenPOWER HostBoot Project
 #
-# COPYRIGHT International Business Machines Corp. 2013,2014
+# Contributors Listed Below - COPYRIGHT 2013,2017
+# [+] International Business Machines Corp.
+#
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -74,3 +76,9 @@ $(IMGDIR)/lib$(MODULE).so : $(OBJECTS) $(ROOTPATH)/src/module.ld $(MODULE_INIT)
 		   $(OBJECTS) $(MODULE_INIT) \
 	           -T $(ROOTPATH)/src/module.ld -o $@
 endif
+
+try = $(shell set -e; if ($(1)) >/dev/null 2>&1; \
+        then echo "$(2)"; \
+        else echo "$(3)"; fi )
+
+try-cflag = $(call try,$(1) $(2) -x c -c /dev/null -o /dev/null,$(2))

src/build/mkrules/dist.targets.mk

@@ -71,7 +71,6 @@ COPY_FILES = \
     obj/genfiles/targAttrInfo.csv:vpo \
     obj/genfiles/target_types_merged.xml:openpower \
     obj/genfiles/fapiattrs.xml:openpower \
-    obj/genfiles/attributeOverride:tools,openpower \
     src/usr/targeting/attroverride/README.attr_override:tools,openpower \
     src/build/hwpf/prcd_compile.tcl:tools \
     src/build/buildpnor/buildSbePart.pl:openpower \
@@ -96,6 +95,12 @@ COPY_FILES = \
     src/usr/targeting/common/xmltohb/bios_metadata_petitboot.xslt:openpower \
     $(foreach file, $(call ROOTPATH_WILDCARD,releaseNotes.html), $(file):fsp)\
 
+ifeq ($(call try-cflag,$(CCACHE) $(HOST_PREFIX)g++,-std=gnu++11),-std=gnu++11)
+COPY_FILES += obj/genfiles/attributeOverride:tools,openpower
+else
+COPY_FILES += obj/genfiles/attributeOverride:tools
+endif
+
 include ${ROOTPATH}/config.mk
 COPY_FILES += $(if $(CONFIG_INCLUDE_XML_OPPOWERVM),src/usr/targeting/common/xmltohb/target_types_oppowervm.xml:openpower) \
     $(if $(CONFIG_INCLUDE_XML_OPPOWERVM),src/usr/targeting/common/xmltohb/attribute_types_oppowervm.xml:openpower) \

src/usr/targeting/attroverride/makefile

@@ -5,7 +5,7 @@
 #
 # OpenPOWER HostBoot Project
 #
-# Contributors Listed Below - COPYRIGHT 2014,2016
+# Contributors Listed Below - COPYRIGHT 2014,2017
 # [+] International Business Machines Corp.
 #
 #
@@ -49,8 +49,14 @@ include $(ROOTPATH)/config.mk
 vpath %.C $(GENDIR)
 vpath %.H $(GENDIR)
 
+ifeq ($(call try-cflag,$(CCACHE) $(HOST_PREFIX)g++,-std=gnu++11),-std=gnu++11)
 $(OUT_FILE): $(C_FILES) $(H_FILES)
 	$(C2) "    CC         $(notdir $@)"
 	$(C1)$(CCACHE) $(HOST_PREFIX)g++ -std=gnu++11 -O3 -g -o $(OUT_FILE)\
 			$(foreach dir,$(INC_DIRS), -I $(dir)) -iquote.\
 			$(foreach file,$^,$(if $(findstring .H,$(file)),,$(file)))
+else
+$(OUT_FILE): $(C_FILES) $(H_FILES)
+	$(C2) "    GEN-NULL   $(notdir $@)"
+	@(echo '#!/bin/sh'; echo 'exit -1';) > $(OUT_FILE)
+endif