xtensa: only build platform or variant if they contain a Makefile
We only add the platform or variant directory to core-y if it
contains a Makefile. Consequently, we can remove the Makefiles
for the dc232b and fsf processor variants.
Signed-off-by: Chris Zankel <chris@zankel.net>
diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
index d0a8ba4..4caffac 100644
--- a/arch/xtensa/Makefile
+++ b/arch/xtensa/Makefile
@@ -64,23 +64,23 @@
endif
endif
-#
+# Only build variant and/or platform if it includes a Makefile
+
+buildvar := $(shell test -a $(srctree)/arch/xtensa/variants/$(VARIANT)/Makefile && echo arch/xtensa/variants/$(VARIANT)/)
+buildplf := $(shell test -a $(srctree)/arch/xtensa/platforms/$(PLATFORM)/Makefile && echo arch/xtensa/platforms/$(PLATFORM)/)
+
+# Find libgcc.a
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
head-y := arch/xtensa/kernel/head.o
core-y += arch/xtensa/kernel/ arch/xtensa/mm/
-ifneq ($(VARIANT),)
-core-y += arch/xtensa/variants/$(VARIANT)/
-endif
-ifneq ($(PLATFORM),)
-core-y += arch/xtensa/platforms/$(PLATFORM)/
-endif
+core-y += $(buildvar) $(buildplf)
+
libs-y += arch/xtensa/lib/ $(LIBGCC)
boot := arch/xtensa/boot
-
all: zImage
bzImage : zImage