kbuild: fix a bug of the u-boot-spl link rule

cmd_u-boot-spl includes $(PLATFORM_LIBS) which changes
when CONFIG_USE_PRIVATE_GCC is updated.  The u-boot-spl image
should be re-linked if any prerequisite is newer than it
or the command line has changed.
$(call, if_changed,...) should be used instead of $(call cmd,...).

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
index 88c01d18ecf9a94fbee9b6cd273c7b6c3285fe3d..7afe437e62e11b1ed25f13c909fff68263957948 100644 (file)
--- a/scripts/Makefile.spl
+++ b/scripts/Makefile.spl
@@ -216,13 +216,13 @@ $(obj)/sunxi-spl.bin: $(obj)/$(SPL_BIN).bin
 endif
 
 quiet_cmd_u-boot-spl = LD      $@
-      cmd_u-boot-spl = cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
+      cmd_u-boot-spl = (cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
                       $(patsubst $(obj)/%,%,$(u-boot-spl-init)) --start-group \
                       $(patsubst $(obj)/%,%,$(u-boot-spl-main)) --end-group \
-                      $(PLATFORM_LIBS) -Map $(SPL_BIN).map -o $(SPL_BIN)
+                      $(PLATFORM_LIBS) -Map $(SPL_BIN).map -o $(SPL_BIN))
 
-$(obj)/$(SPL_BIN): $(u-boot-spl-init) $(u-boot-spl-main) $(obj)/u-boot-spl.lds
-       $(call cmd,u-boot-spl)
+$(obj)/$(SPL_BIN): $(u-boot-spl-init) $(u-boot-spl-main) $(obj)/u-boot-spl.lds FORCE
+       $(call if_changed,u-boot-spl)
 
 $(sort $(u-boot-spl-init) $(u-boot-spl-main)): $(u-boot-spl-dirs) ;