build: Use filechk rules to create and update u-boot.lds
Prior to this patch, the top-level linker script u-boot.lds
used a simple $(call if_changed) check when generated.
That mechanism misses cases where a possible include file
change induces a change in the u-boot.lds too.
This patch converts it to a stronger check using ($call filechk)
that will also notice differences in file contents and
will catch changes due to pre-processing as well.
Signed-off-by: Jon Loeliger <jon.loeliger@oracle.com>
diff --git a/Makefile b/Makefile
index 0191869..6aaf116 100644
--- a/Makefile
+++ b/Makefile
@@ -1093,12 +1093,13 @@
@echo '*** Warning: make $@ is unnecessary now.'
# ---------------------------------------------------------------------------
-quiet_cmd_cpp_lds = LDS $@
-cmd_cpp_lds = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) -ansi \
- -D__ASSEMBLY__ -x assembler-with-cpp -P -o $@ $<
+define filechk_ubootlds
+ ($(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) -ansi \
+ -D__ASSEMBLY__ -x assembler-with-cpp -P -o - -)
+endef
u-boot.lds: $(LDSCRIPT) prepare FORCE
- $(call if_changed_dep,cpp_lds)
+ $(call filechk,ubootlds)
PHONY += nand_spl
nand_spl: prepare