Merge "Use dependency files generated by llvm-rs-cc for Java"

## Commands to compile RenderScript to Java

###########################################################

## Merge multiple .d files generated by llvm-rs-cc. This is necessary

## because ninja can handle only a single depfile per build target.

## .d files generated by llvm-rs-cc define .stamp, .bc, and optionally

## .java as build targets. However, there's no way to let ninja know

## dependencies to .bc files and .java files, so we give up build

## targets for them. As we write the .stamp file as the target by

## ourselves, the awk script removes the first lines before the colon

## and append a backslash to the last line to concatenate contents of

## multiple files.

# $(1): .d files to be merged

# $(2): merged .d file

define _merge-renderscript-d

$(hide) echo '$@: $(backslash)' > $2

$(foreach d,$1, \

  $(hide) awk 'start { sub(/( \\)?$$/, " \\"); print } /:/ { start=1 }' < $d >> $2$(newline))

$(hide) echo >> $2

endef

define transform-renderscripts-to-java-and-bc

@echo "RenderScript: $(PRIVATE_MODULE) <= $(PRIVATE_RS_SOURCE_FILES)"

$(hide) rm -rf $(PRIVATE_RS_OUTPUT_DIR)

  $(PRIVATE_RS_FLAGS) \

  $(foreach inc,$(PRIVATE_RS_INCLUDES),$(addprefix -I , $(inc))) \

  $(PRIVATE_RS_SOURCE_FILES)

  $(foreach d,$(PRIVATE_DEP_FILES),\

    $(call transform-d-to-p-args,$(d),$(d:%.d=%.P))$(newline))

$(call _merge-renderscript-d,$(PRIVATE_DEP_FILES),$@.d)

$(call transform-d-to-p-args,$@.d,$@.P)

$(hide) mkdir -p $(dir $@)

$(hide) touch $@

endef

## Commands to compile RenderScript to C++

###########################################################

## Merge multiple .d files generated by llvm-rs-cc. This is necessary

## because ninja can handle only a single depfile per build target.

## We assume .d files start with two targets and their prerequisites

## follow. The first line is for the stamp file and the second line is

## for .bc file. There's no way to let ninja know dependencies to .bc

## files, so we give up build targets for .bc files. As we write the

## .stamp file as the target by ourselves, the sed script removes the

## first two lines and append a backslash to the last line to

## concatenate contents of multiple files.

# $(1): .d files to be merged

# $(2): merged .d file

define _merge-renderscript-d

$(hide) echo '$@: $(backslash)' > $2

$(foreach d,$1, \

  $(hide) sed '1d; 2d; s/\( \\\)\?$$/ \\/' $d >> $2$(newline))

$(hide) echo >> $2

endef

define transform-renderscripts-to-cpp-and-bc

@echo "RenderScript: $(PRIVATE_MODULE) <= $(PRIVATE_RS_SOURCE_FILES)"

$(hide) rm -rf $(PRIVATE_RS_OUTPUT_DIR)

	$(transform-renderscripts-to-java-and-bc)

# include the dependency files (.d/.P) generated by llvm-rs-cc.

-include $(bc_dep_files:%.d=%.P)

$(call include-depfile,$(RenderScript_file_stamp).P,$(RenderScript_file_stamp))

ifneq ($(LOCAL_RENDERSCRIPT_COMPATIBILITY),)