Makefile: use if_change_dep for u-boot.cfg
cmd_cpp_cfg generates a dependency output, but because it's invoked using
if_changed rather than if_changed_dep, that dependency file is ignored.
This results in Kbuild not knowing about which files u-boot.cfg depends
on, so it may not be rebuilt when required.
A practical result of this is that u-boot.cfg may continue to reference
CONFIG_ options that no longer exist in the source tree, and this can
cause the adhoc config options check to fail.
This change modifies Makefile to use if_changed_dep, which in turn causes
all dependencies to be known to the next make invocation.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/Makefile b/Makefile
index fffc188..949b264 100644
--- a/Makefile
+++ b/Makefile
@@ -937,7 +937,7 @@
$(OBJDUMP) -d $< > $@
u-boot.cfg: include/config.h FORCE
- $(call if_changed,cpp_cfg)
+ $(call if_changed_dep,cpp_cfg)
# Check that this build does not use CONFIG options that we don't know about
# unless they are in Kconfig. All the existing CONFIG options are whitelisted,