kbuild: fix DTB .cmd source variable

*.dts are processed using a custom command, then the C pre-processor is
run on them, then they are compiled using dtc. Thus, the dependency
files generated by both cpp and dtc reference a temporary file name
rather than the actual source file. While this information isn't used
for any purpose by the build system, and hence this causes no functional
issue, it does cause the dependency files to contain invalid and
confusing data, which is unhelpful while debugging build problems. Fix
this using sed.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 704d644f6faa5a4b61da912905789c1601d759da..ec5c41ec561627f94878879f38e9344d79e263a9 100644 (file)
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -301,7 +301,8 @@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
        $(DTC) -O dtb -o $@ -b 0 \
                -i $(dir $<) $(DTC_FLAGS) \
                -d $(depfile).dtc.tmp $(dtc-tmp) ; \
-       cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
+       cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) ; \
+       sed -i "s:$(pre-tmp):$(<):" $(depfile)
 
 $(obj)/%.dtb: $(src)/%.dts FORCE
        $(call if_changed_dep,dtc)