Re: Adding selftest testdata dynamically into live tree

On Mon, 22 Sep 2014 20:05:37 +0200, Janusz Użycki [off-list ref] wrote:

Hi.

On 3.17.0-rc6-next-20140922+ with CONFIG_OF_SELFTEST enabled
zImage is recreated every time I call "make" despite I've not done
any change in source files and zImage was the same.
This is caused by the rm line:
   CALL    scripts/checksyscalls.sh
   CHK     include/generated/compile.h
   DTC     drivers/of/testcase-data/testcases.dtb
   DTB     drivers/of/testcase-data/testcases.dtb.S
   AS      drivers/of/testcase-data/testcases.dtb.o
   LD      drivers/of/of_selftest.o
   LD      drivers/of/built-in.o
rm drivers/of/testcase-data/testcases.dtb.S 
drivers/of/testcase-data/testcases.dtb
   LD      drivers/built-in.o
   LINK    vmlinux
   LD      vmlinux.o

Try this change:

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 260bf8acfce9..4555e2e1b4ed 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib

@@ -269,7 +269,7 @@ cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
-$(obj)/%.dtb: $(src)/%.dts FORCE
+$(obj)/%.dtb: $(src)/%.dts
 	$(call if_changed_dep,dtc)
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)

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