# # Build Template # # Invoke this template with a set of variables in order to make build targets # for a build variant that targets a specific CPU architecture. # ################################################################################ # # Build Template # # Invoke this to instantiate a set of build targets. Two build targets are # produced by this template that can be either used directly or depended on to # perform post processing (ie: during a nanoapp build). # # TARGET_NAME_ar - An archive of the code compiled by this template. # TARGET_NAME_so - A shared object of the code compiled by this template. # TARGET_NAME - A convenience target that depends on the above archive and # shared object targets. # # Argument List: # $1 - TARGET_NAME - The name of the target being built. # $2 - TARGET_CFLAGS - The compiler flags to use for this target. # $3 - TARGET_CC - The C/C++ compiler for the target variant. # $4 - TARGET_SO_LDFLAGS - The linker flags to use for this target. # $5 - TARGET_LD - The linker for the target variant. # $6 - TARGET_ARFLAGS - The archival flags to use for this target. # $7 - TARGET_AR - The archival tool for the targer variant. # $8 - TARGET_VARIANT_SRCS - Source files specific to this variant. # $9 - TARGET_BUILD_BIN - Build a binary. Typically this means that the # source files provided include an entry point. # $10 - TARGET_BIN_LDFLAGS - Linker flags that are passed to the linker # when building an executable binary. # $11 - TARGET_SO_EARLY_LIBS - Link against a set of libraries when building # a shared object or binary. These are placed # before the objects produced by this build. # $12 - TARGET_SO_LATE_LIBS - Link against a set of libraries when building # a shared object or binary. These are placed # after the objects produced by this build. # $13 - TARGET_PLATFORM_ID - The ID of the platform that this nanoapp # build targets. # ################################################################################ ifndef BUILD_TEMPLATE define BUILD_TEMPLATE # Target Objects ############################################################### # Source files. $$(1)_CC_SRCS = $$(filter %.cc, $(COMMON_SRCS) $(8)) $$(1)_CPP_SRCS = $$(filter %.cpp, $(COMMON_SRCS) $(8)) $$(1)_C_SRCS = $$(filter %.c, $(COMMON_SRCS) $(8)) $$(1)_S_SRCS = $$(filter %.S, $(COMMON_SRCS) $(8)) # Object files. $$(1)_OBJS_DIR = $(1)_objs $$(1)_CC_OBJS = $$(patsubst %.cc, $(OUT)/$$($$(1)_OBJS_DIR)/%.o, \ $$($$(1)_CC_SRCS)) $$(1)_CPP_OBJS = $$(patsubst %.cpp, $(OUT)/$$($$(1)_OBJS_DIR)/%.o, \ $$($$(1)_CPP_SRCS)) $$(1)_C_OBJS = $$(patsubst %.c, $(OUT)/$$($$(1)_OBJS_DIR)/%.o, \ $$($$(1)_C_SRCS)) $$(1)_S_OBJS = $$(patsubst %.S, $(OUT)/$$($$(1)_OBJS_DIR)/%.o, \ $$($$(1)_S_SRCS)) # Automatic dependency resolution Makefiles. $$(1)_CC_DEPS = $$(patsubst %.cc, $(OUT)/$$($$(1)_OBJS_DIR)/%.d, \ $$($$(1)_CC_SRCS)) $$(1)_CPP_DEPS = $$(patsubst %.cpp, $(OUT)/$$($$(1)_OBJS_DIR)/%.d, \ $$($$(1)_CPP_SRCS)) $$(1)_C_DEPS = $$(patsubst %.c, $(OUT)/$$($$(1)_OBJS_DIR)/%.d, \ $$($$(1)_C_SRCS)) $$(1)_S_DEPS = $$(patsubst %.S, $(OUT)/$$($$(1)_OBJS_DIR)/%.d, \ $$($$(1)_S_SRCS)) # Add object file directories. $$$(1)_DIRS = $$(sort $$(dir $$($$(1)_CC_OBJS) \ $$($$(1)_CPP_OBJS) \ $$($$(1)_C_OBJS) \ $$($$(1)_S_OBJS))) # Outputs ###################################################################### # Shared Object $$(1)_SO = $(OUT)/$$$(1)/$(OUTPUT_NAME).so # Static Archive $$(1)_AR = $(OUT)/$$$(1)/$(OUTPUT_NAME).a # Nanoapp Header $$(1)_HEADER = $$(if $(IS_NANOAPP_BUILD), $(OUT)/$$$(1)/$(OUTPUT_NAME).napp_header, ) # Optional Binary $$(1)_BIN = $$(if $(9), $(OUT)/$$$(1)/$(OUTPUT_NAME), ) # Top-level Build Rule ######################################################### # Define the phony target. .PHONY: $(1)_ar $(1)_ar: $$($$(1)_AR) .PHONY: $(1)_so $(1)_so: $$($$(1)_SO) .PHONY: $(1)_bin $(1)_bin: $$($$(1)_BIN) .PHONY: $(1)_header $(1)_header: $$($$(1)_HEADER) .PHONY: $(1) $(1): $(1)_ar $(1)_so $(1)_bin $(1)_header # If building the runtime, simply add the archive and shared object to the all # target. When building CHRE, it is expected that this runtime just be linked # into another build system (or the entire runtime is built using another build # system). ifeq ($(IS_NANOAPP_BUILD),) all: $(1) endif # Nanoapp Header Generation #################################################### # # Whoa there... what have we here? Some binary file generation ala bash? ಠ_ಠ # # The following build rule generates a nanoapp header. A nanoapp header is a # small binary blob that is prepended to a nanoapp. Android can parse this # blob to determine some attributes about the nanoapp, such as version and # target hub. The layout is as follows: # # struct NanoAppBinaryHeader { # uint32_t headerVersion; // 0x1 for this version # uint32_t magic; // "NANO" # uint64_t appId; // App Id, contains vendor id # uint32_t appVersion; // Version of the app # uint32_t flags; // Signed, encrypted # uint64_t hwHubType; // Which hub type is this compiled for # uint8_t targetChreApiMajorVersion; // CHRE API version # uint8_t targetChreApiMinorVersion; # uint8_t reserved[6]; # } __attribute__((packed)); # # The basic idea here is to generate a hexdump formatted file and then reverse # that hexdump into binary form. The way that is accomplished is as follows. # # ... Why tho? # # The build system has a lot of knowledge of what it is building: the name of # the nanoapp, the version and the app ID. Marshalling this data from the # Makefile environment into something like python or even a small C program # is an unnecessary step. $$($$(1)_HEADER): printf "00000000 %.8x " `$(BE_TO_LE_SCRIPT) 0x00000001` > $$@ printf "%.8x " `$(BE_TO_LE_SCRIPT) 0x4f4e414e` >> $$@ printf "%.16x\n" `$(BE_TO_LE_SCRIPT) $(NANOAPP_ID)` >> $$@ printf "00000010 %.8x " `$(BE_TO_LE_SCRIPT) $(NANOAPP_VERSION)` >> $$@ printf "%.8x " `$(BE_TO_LE_SCRIPT) 0x00000001` >> $$@ printf "%.16x\n" `$(BE_TO_LE_SCRIPT) $(13)` >> $$@ printf "00000020 %.2x " \ `$(BE_TO_LE_SCRIPT) $(TARGET_CHRE_API_VERSION_MAJOR)` >> $$@ printf "%.2x " \ `$(BE_TO_LE_SCRIPT) $(TARGET_CHRE_API_VERSION_MINOR)` >> $$@ printf "%.12x \n" `$(BE_TO_LE_SCRIPT) 0x000000` >> $$@ cp $$@ $$@_ascii xxd -r $$@_ascii > $$@ rm $$@_ascii # Compile ###################################################################### $$($$(1)_CPP_OBJS): $(OUT)/$$($$(1)_OBJS_DIR)/%.o: %.cpp $(3) $(COMMON_CXX_CFLAGS) -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< \ -o $$@ $$($$(1)_CC_OBJS): $(OUT)/$$($$(1)_OBJS_DIR)/%.o: %.cc $(3) $(COMMON_CXX_CFLAGS) -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< \ -o $$@ $$($$(1)_C_OBJS): $(OUT)/$$($$(1)_OBJS_DIR)/%.o: %.c $(3) $(COMMON_C_CFLAGS) -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< \ -o $$@ $$($$(1)_S_OBJS): $(OUT)/$$($$(1)_OBJS_DIR)/%.o: %.S $(3) -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< \ -o $$@ # Archive ###################################################################### # Add common and target-specific archive flags. $$$(1)_ARFLAGS = $(COMMON_ARFLAGS) \ $(6) $$($$(1)_AR): $$(OUT)/$$$(1) $$($$$(1)_DIRS) $$($$(1)_CC_OBJS) \ $$($$(1)_CPP_OBJS) $$($$(1)_C_OBJS) $$($$(1)_S_OBJS) $(7) $$($$$(1)_ARFLAGS) $$@ $$(filter %.o, $$^) # Link ######################################################################### $$($$(1)_SO): $$(OUT)/$$$(1) $$($$$(1)_DIRS) $$($$(1)_CC_DEPS) \ $$($$(1)_CPP_DEPS) $$($$(1)_C_DEPS) $$($$(1)_S_DEPS) \ $$($$(1)_CC_OBJS) $$($$(1)_CPP_OBJS) $$($$(1)_C_OBJS) \ $$($$(1)_S_OBJS) $(5) $(4) -o $$@ $(11) $$(filter %.o, $$^) $(12) $$($$(1)_BIN): $$(OUT)/$$$(1) $$($$$(1)_DIRS) $$($$(1)_CC_DEPS) \ $$($$(1)_CPP_DEPS) $$($$(1)_C_DEPS) $$($$(1)_S_DEPS) \ $$($$(1)_CC_OBJS) $$($$(1)_CPP_OBJS) $$($$(1)_C_OBJS) \ $$($$(1)_S_OBJS) $(3) -o $$@ $(11) $$(filter %.o, $$^) $(12) $(10) # Output Directories ########################################################### $$($$$(1)_DIRS): mkdir -p $$@ $$(OUT)/$$$(1): mkdir -p $$@ # Automatic Dependency Resolution ############################################## $$($$(1)_CC_DEPS): $(OUT)/$$($$(1)_OBJS_DIR)/%.d: %.cc mkdir -p $$(dir $$@) $(3) $(DEP_CFLAGS) $(COMMON_CXX_CFLAGS) \ -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< -o $$@ $$($$(1)_CPP_DEPS): $(OUT)/$$($$(1)_OBJS_DIR)/%.d: %.cpp mkdir -p $$(dir $$@) $(3) $(DEP_CFLAGS) $(COMMON_CXX_CFLAGS) \ -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< -o $$@ $$($$(1)_C_DEPS): $(OUT)/$$($$(1)_OBJS_DIR)/%.d: %.c mkdir -p $$(dir $$@) $(3) $(DEP_CFLAGS) $(COMMON_C_CFLAGS) \ -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< -o $$@ $$($$(1)_S_DEPS): $(OUT)/$$($$(1)_OBJS_DIR)/%.d: %.S mkdir -p $$(dir $$@) $(3) $(DEP_CFLAGS) \ -DCHRE_FILENAME=\"$$(notdir $$<)\" $(2) -c $$< -o $$@ # Include generated dependency files if they are in the requested build target. # This avoids dependency generation from occuring for a debug target when a # non-debug target is requested. ifneq ($(filter $(1) all, $(MAKECMDGOALS)),) -include $$(patsubst %.o, %.d, $$($$(1)_CC_DEPS)) -include $$(patsubst %.o, %.d, $$($$(1)_CPP_DEPS)) -include $$(patsubst %.o, %.d, $$($$(1)_C_DEPS)) -include $$(patsubst %.o, %.d, $$($$(1)_S_DEPS)) endif endef endif # Template Invocation ########################################################## TARGET_CFLAGS_LOCAL = $(TARGET_CFLAGS) TARGET_CFLAGS_LOCAL += -DCHRE_PLATFORM_ID=$(TARGET_PLATFORM_ID) $(eval $(call BUILD_TEMPLATE, $(TARGET_NAME), \ $(COMMON_CFLAGS) $(TARGET_CFLAGS_LOCAL), \ $(TARGET_CC), \ $(TARGET_SO_LDFLAGS), \ $(TARGET_LD), \ $(TARGET_ARFLAGS), \ $(TARGET_AR), \ $(TARGET_VARIANT_SRCS), \ $(TARGET_BUILD_BIN), \ $(TARGET_BIN_LDFLAGS), \ $(TARGET_SO_EARLY_LIBS), \ $(TARGET_SO_LATE_LIBS), \ $(TARGET_PLATFORM_ID))) # Debug Template Invocation #################################################### $(eval $(call BUILD_TEMPLATE, $(TARGET_NAME)_debug, \ $(COMMON_CFLAGS) $(COMMON_DEBUG_CFLAGS) \ $(TARGET_CFLAGS_LOCAL) $(TARGET_DEBUG_CFLAGS), \ $(TARGET_CC), \ $(TARGET_SO_LDFLAGS), \ $(TARGET_LD), \ $(TARGET_ARFLAGS), \ $(TARGET_AR), \ $(TARGET_VARIANT_SRCS), \ $(TARGET_BUILD_BIN), \ $(TARGET_BIN_LDFLAGS), \ $(TARGET_SO_EARLY_LIBS), \ $(TARGET_SO_LATE_LIBS), \ $(TARGET_PLATFORM_ID)))