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authorStephen Warren <swarren@nvidia.com>2013-03-06 10:28:02 -0700
committerStephen Warren <swarren@nvidia.com>2013-04-05 12:23:04 -0600
commit85f02be8e5fd48a9bf8c719a4f12b4209b1e55b5 (patch)
tree7dad81db6892ab67dbd4178ece3a033a427d76ab
parent2ab8a99661f4ce052bbad064237c441371df8751 (diff)
downloadop-kernel-dev-85f02be8e5fd48a9bf8c719a4f12b4209b1e55b5.zip
op-kernel-dev-85f02be8e5fd48a9bf8c719a4f12b4209b1e55b5.tar.gz
kbuild: cmd_dtc_cpp: extract deps from both gcc -E and dtc
Prior to this change, when compiling *.dts to *.dtb, the dependency output from dtc would be used, and when compiling *.dtsp to *.dtb, the dependency output from gcc -E alone would be used, despite dtc also being invoked (on a temporary file that was guaranteed to have no dependencies). With this change, when compiling *.dtsp to *.dtb, the dependency files from both gcc -E and dtc are used. This will allow cmd_dtc_cpp to replace cmd_dtc in a future change. In turn, that will allow the C pre- processor to be run transparently on *.dts, without the need to a separate rule or file extension to trigger it. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Rob Herring <rob.herring@calxeda.com>
-rw-r--r--scripts/Makefile.lib5
1 files changed, 3 insertions, 2 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index af35521..6104335 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -156,7 +156,7 @@ cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
ld_flags = $(LDFLAGS) $(ldflags-y)
-dtc_cpp_flags = -Wp,-MD,$(depfile) -nostdinc \
+dtc_cpp_flags = -Wp,-MD,$(depfile).pre -nostdinc \
-I$(srctree)/arch/$(SRCARCH)/boot/dts \
-I$(srctree)/arch/$(SRCARCH)/boot/dts/include \
-undef -D__DTS__
@@ -278,7 +278,8 @@ dtc-tmp = $(subst $(comma),_,$(dot-target).dts)
quiet_cmd_dtc_cpp = DTC+CPP $@
cmd_dtc_cpp = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
- $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) $(dtc-tmp)
+ $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) -d $(depfile).dtc $(dtc-tmp) ; \
+ cat $(depfile).pre $(depfile).dtc > $(depfile)
$(obj)/%.dtb: $(src)/%.dtsp FORCE
$(call if_changed_dep,dtc_cpp)
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