PPC/s390: [build] fix target_arch for ppc/s390 native builds

Makefile

Index: Makefile
diff --git a/Makefile b/Makefile
index 1f724053d115d4a33a64dd315db069091c36bc6d..ffb5192bfa12fdb08d5f897b464cfabe3ce7fef8 100644
--- a/Makefile
+++ b/Makefile
@@ -448,6 +448,10 @@ $(OUT_MAKEFILES): $(GYPFILES) $(ENVFILE)
 	        cut -f 2 -d " " | cut -f 1 -d "-" ))
 	$(eval CXX_TARGET_ARCH:=$(subst aarch64,arm64,$(CXX_TARGET_ARCH)))
 	$(eval CXX_TARGET_ARCH:=$(subst x86_64,x64,$(CXX_TARGET_ARCH)))
+	$(eval CXX_TARGET_ARCH:=$(subst s390x,s390,$(CXX_TARGET_ARCH)))
+	$(eval CXX_TARGET_ARCH:=$(subst powerpc,ppc,$(CXX_TARGET_ARCH)))
+	$(eval CXX_TARGET_ARCH:=$(subst ppc64,ppc,$(CXX_TARGET_ARCH)))

[Michael Achenbach, 2016/06/17 06:35:01]

Not sure I understand the replacement of ppc64 with ppc. So if ppc64 is compiled
native, isn't the v8_target_arch == ppc64? In this case the condition below
would not set target_arch, but on the other hand it also wouldn't set ia32 as
also that condition wouldn't hold for ppc64. Maybe doesn't matter...

[john.yan, 2016/06/17 13:06:09]

Hello Michael,

I found that when v8_target_arch == ppc64 and CXX_TARGET_ARCH == ppc,
"$(findstring $(CXX_TARGET_ARCH),$(V8_TARGET_ARCH))" will actually return TRUE.
So target_arch will actually be set correctly.

+	$(eval CXX_TARGET_ARCH:=$(subst ppcle,ppc,$(CXX_TARGET_ARCH)))
 	$(eval V8_TARGET_ARCH:=$(subst .,,$(suffix $(basename $@))))
 	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(shell pwd)/gypfiles:$(PYTHONPATH):$(shell pwd)/tools/gyp/pylib:$(PYTHONPATH)" \
 	GYP_GENERATORS=make \