kbuild: create a rule to run the pre-processor on *.dts files

[~andy/linux] / scripts / Makefile.lib

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index bdf42fdf64c9adb0095a1ff0ad3437499d0ba87c..7910229ec6657c93608d44f211ef0a01e2501d1a 100644 (file)
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -269,6 +269,16 @@ cmd_dtc = $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) -d $(depfile
 $(obj)/%.dtb: $(src)/%.dts FORCE
        $(call if_changed_dep,dtc)
 
+dtc-tmp = $(subst $(comma),_,$(dot-target).dts)
+
+quiet_cmd_dtc_cpp = DTC+CPP $@
+cmd_dtc_cpp = $(CPP) $(cpp_flags) -x assembler-with-cpp -undef -D__DTS__  \
+                       -o $(dtc-tmp) $< ; \
+       $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) $(dtc-tmp)
+
+$(obj)/%.dtb: $(src)/%.dtsp FORCE
+       $(call if_changed_dep,dtc_cpp)
+
 # Bzip2
 # ---------------------------------------------------------------------------