From 7c6a7d09baae72fdbf3f17c97fb41205d09562cd Mon Sep 17 00:00:00 2001
From: Christopher Wiley <wiley@google.com>
Date: Wed, 14 Oct 2015 17:27:24 -0700
Subject: [PATCH] Invoke the aidl-cpp compiler to generate C++

(cherry picked from commit 2df75d17a8d7aacd538cf1c34cf4e11c2af53251)

Bug: 23599697
Change-Id: Iae25f62fa9e2375a36d1a930887b2bcfd9e3f8a2
Test: test application compiles generated code
---
 core/binary.mk      | 32 ++++++++++++++++++++++++++++++++
 core/config.mk      |  1 +
 core/definitions.mk |  8 ++++++++
 3 files changed, 41 insertions(+)

diff --git a/core/binary.mk b/core/binary.mk
index b8003d711..e6ad7889b 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -587,6 +587,38 @@ endif
 endif  # $(proto_sources) non-empty
 
 ###########################################################
+## AIDL: Compile .aidl files to .cpp and .h files
+###########################################################
+aidl_src := $(strip $(filter %.aidl,$(my_src_files)))
+aidl_gen_cpp :=
+ifneq ($(aidl_src),)
+
+aidl_gen_cpp_root := $(intermediates)/aidl-generated/src
+aidl_gen_include_root := $(intermediates)/aidl-generated/include
+
+aidl_gen_cpp := $(patsubst %.aidl,%$(LOCAL_CPP_EXTENSION),$(aidl_src))
+aidl_gen_cpp := $(addprefix $(aidl_gen_cpp_root)/,$(aidl_gen_cpp))
+
+# TODO(wiley): we could pass down a flag here to only generate the server or
+#              client side of the binder interface.
+$(aidl_gen_cpp) : PRIVATE_MODULE := $(LOCAL_MODULE)
+$(aidl_gen_cpp) : PRIVATE_HEADER_OUTPUT_DIR := $(aidl_gen_include_root)
+$(aidl_gen_cpp) : PRIVATE_AIDL_FLAGS := $(addprefix -I,$(LOCAL_AIDL_INCLUDES))
+
+# Multi-architecture builds have distinct intermediates directories.
+# Define rules for both architectures.
+$(aidl_gen_cpp) : $(aidl_gen_cpp_root)/%$(LOCAL_CPP_EXTENSION) : $(LOCAL_PATH)/%.aidl $(AIDL_CPP)
+	$(transform-aidl-to-cpp)
+-include $(addsuffix .P,$(basename $(aidl_gen_cpp)))
+
+# Add generated headers to include path.
+my_c_includes += $(aidl_gen_include_root)
+# Pick up the generated C++ files later for transformation to .o files.
+my_generated_sources += $(aidl_gen_cpp)
+
+endif  # $(aidl_src) non-empty
+
+###########################################################
 ## YACC: Compile .y and .yy files to .cpp and the to .o.
 ###########################################################
 
diff --git a/core/config.mk b/core/config.mk
index 51810aa19..136b2049e 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -398,6 +398,7 @@ YASM := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/yasm/yasm
 DOXYGEN:= doxygen
 AAPT := $(HOST_OUT_EXECUTABLES)/aapt$(HOST_EXECUTABLE_SUFFIX)
 AIDL := $(HOST_OUT_EXECUTABLES)/aidl$(HOST_EXECUTABLE_SUFFIX)
+AIDL_CPP := $(HOST_OUT_EXECUTABLES)/aidl-cpp$(HOST_EXECUTABLE_SUFFIX)
 PROTOC := $(HOST_OUT_EXECUTABLES)/aprotoc$(HOST_EXECUTABLE_SUFFIX)
 SIGNAPK_JAR := $(HOST_OUT_JAVA_LIBRARIES)/signapk$(COMMON_JAVA_PACKAGE_SUFFIX)
 MKBOOTFS := $(HOST_OUT_EXECUTABLES)/mkbootfs$(HOST_EXECUTABLE_SUFFIX)
diff --git a/core/definitions.mk b/core/definitions.mk
index 9dea18c20..9df23fd09 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1002,6 +1002,14 @@ $(hide) $(AIDL) -d$(patsubst %.java,%.P,$@) $(PRIVATE_AIDL_FLAGS) $< $@
 endef
 #$(AIDL) $(PRIVATE_AIDL_FLAGS) $< - | indent -nut -br -npcs -l1000 > $@
 
+define transform-aidl-to-cpp
+@mkdir -p $(dir $@)
+@mkdir -p $(PRIVATE_HEADER_OUTPUT_DIR)
+@echo "Generating C++ from AIDL: $(PRIVATE_MODULE) <= $<"
+$(hide) $(AIDL_CPP) -d$(basename $@).P $(PRIVATE_AIDL_FLAGS) \
+    $< $(PRIVATE_HEADER_OUTPUT_DIR) $@
+endef
+
 
 ###########################################################
 ## Commands for running java-event-log-tags.py
-- 
2.11.0