Bug 1642174 - Resolve sha512-p8.o: ABI version 2 is not compatible wi…

…th ABI version 1 output. r=jcj

Don't try to build the SHA-2 accelerated asm on old-ABI ppc.

Currently make only, I don't have enough gyp-fu to do that side.
However, the reporters of 1642174 and 1635625 both used make, not gyp.

Signed-off-by: Lauri Kasanen <cand@gmx.com>

--HG--
extra : amend_source : 9fbc77541c628a1f90187d598df7a37b04393998

lib/freebl/Makefile

@@ -293,9 +293,12 @@ ifeq ($(CPU_ARCH),arm)
 endif
 ifeq ($(CPU_ARCH),ppc)
     EXTRA_SRCS += gcm-ppc.c
-    ASFILES += sha512-p8.s
 ifdef USE_64
     DEFINES += -DNSS_NO_INIT_SUPPORT
+    PPC_ABI := $(shell $(CC) -dM -E - < /dev/null | awk '$$2 == "_CALL_ELF" {print $$3}')
+    ifeq ($(PPC_ABI),2)
+        ASFILES += sha512-p8.s
+    endif
 endif # USE_64
 endif # ppc
 endif # Linux