b32a0fd092
If a module sets MODULE_STATIC_LIB to true, that module will generate a .a file instead of a partially linked .o file. When WITH_LINKER_GC is enables, unreferenced code and data in c files are dropped from the final elf file. This does not work for most assembly files, since they put code and data directly into the .text and .data section. If a .a file is used instead however, files that have no external references are dropped regardless of which sections they have. If MODULE_STATIC_LIB is true, this change also disabled LK_INIT_HOOK* as files using this as the only entrypoint would also be dropped. Change-Id: I846ac1bf63018d1d713ca841e03191b1fac35bf4
143 lines
4.3 KiB
Makefile
143 lines
4.3 KiB
Makefile
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# modules
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#
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# args:
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# MODULE : module name (required)
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# MODULE_SRCS : list of source files, local path (required)
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# MODULE_STATIC_LIB : if true generate .a instead of .o
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# MODULE_DEPS : other modules that this one depends on
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# MODULE_DEFINES : #defines local to this module
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# MODULE_OPTFLAGS : OPTFLAGS local to this module
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# MODULE_COMPILEFLAGS : COMPILEFLAGS local to this module
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# MODULE_CFLAGS : CFLAGS local to this module
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# MODULE_CPPFLAGS : CPPFLAGS local to this module
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# MODULE_ASMFLAGS : ASMFLAGS local to this module
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# MODULE_INCLUDES : include directories local to this module
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# MODULE_SRCDEPS : extra dependencies that all of this module's files depend on
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# MODULE_EXTRA_OBJS : extra .o files that should be linked with the module
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# MODULE_ARM_OVERRIDE_SRCS : list of source files, local path that should be force compiled with ARM (if applicable)
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# the minimum module rules.mk file is as follows:
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#
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# LOCAL_DIR := $(GET_LOCAL_DIR)
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# MODULE := $(LOCAL_DIR)
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#
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# MODULE_SRCS := $(LOCAL_DIR)/at_least_one_source_file.c
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#
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# include make/module.mk
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# test for old style rules.mk
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ifneq ($(MODULE_OBJS),)
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$(warning MODULE_OBJS = $(MODULE_OBJS))
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$(error MODULE $(MODULE) is setting MODULE_OBJS, change to MODULE_SRCS)
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endif
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ifneq ($(OBJS),)
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$(warning OBJS = $(OBJS))
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$(error MODULE $(MODULE) is probably setting OBJS, change to MODULE_SRCS)
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endif
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MODULE_SRCDIR := $(MODULE)
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MODULE_BUILDDIR := $(call TOBUILDDIR,$(MODULE_SRCDIR))
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# add a local include dir to the global include path
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GLOBAL_INCLUDES += $(MODULE_SRCDIR)/include
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# add the listed module deps to the global list
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MODULES += $(MODULE_DEPS)
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#$(info module $(MODULE))
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#$(info MODULE_SRCDIR $(MODULE_SRCDIR))
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#$(info MODULE_BUILDDIR $(MODULE_BUILDDIR))
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#$(info MODULE_DEPS $(MODULE_DEPS))
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#$(info MODULE_SRCS $(MODULE_SRCS))
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MODULE_DEFINES += MODULE_COMPILEFLAGS=\"$(subst $(SPACE),_,$(MODULE_COMPILEFLAGS))\"
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MODULE_DEFINES += MODULE_CFLAGS=\"$(subst $(SPACE),_,$(MODULE_CFLAGS))\"
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MODULE_DEFINES += MODULE_CPPFLAGS=\"$(subst $(SPACE),_,$(MODULE_CPPFLAGS))\"
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MODULE_DEFINES += MODULE_ASMFLAGS=\"$(subst $(SPACE),_,$(MODULE_ASMFLAGS))\"
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MODULE_DEFINES += MODULE_LDFLAGS=\"$(subst $(SPACE),_,$(MODULE_LDFLAGS))\"
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MODULE_DEFINES += MODULE_OPTFLAGS=\"$(subst $(SPACE),_,$(MODULE_OPTFLAGS))\"
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MODULE_DEFINES += MODULE_INCLUDES=\"$(subst $(SPACE),_,$(MODULE_INCLUDES))\"
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MODULE_DEFINES += MODULE_SRCDEPS=\"$(subst $(SPACE),_,$(MODULE_SRCDEPS))\"
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MODULE_DEFINES += MODULE_DEPS=\"$(subst $(SPACE),_,$(MODULE_DEPS))\"
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MODULE_DEFINES += MODULE_SRCS=\"$(subst $(SPACE),_,$(MODULE_SRCS))\"
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ifeq (true,$(call TOBOOL,$(MODULE_STATIC_LIB)))
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MODULE_DEFINES += MODULE_STATIC_LIB=1
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endif
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# generate a per-module config.h file
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MODULE_CONFIG := $(MODULE_BUILDDIR)/module_config.h
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$(MODULE_CONFIG): MODULE_DEFINES:=$(MODULE_DEFINES)
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$(MODULE_CONFIG): configheader
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@$(call MAKECONFIGHEADER,$@,MODULE_DEFINES)
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GENERATED += $(MODULE_CONFIG)
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MODULE_COMPILEFLAGS += --include $(MODULE_CONFIG)
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MODULE_SRCDEPS += $(MODULE_CONFIG)
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MODULE_INCLUDES := $(addprefix -I,$(MODULE_INCLUDES))
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# include the rules to compile the module's object files
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include make/compile.mk
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# MODULE_OBJS is passed back from compile.mk
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#$(info MODULE_OBJS = $(MODULE_OBJS))
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# build a ld -r style combined object
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ifeq (true,$(call TOBOOL,$(MODULE_STATIC_LIB)))
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MODULE_OBJECT := $(call TOBUILDDIR,$(MODULE_SRCDIR).mod.a)
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$(MODULE_OBJECT): $(MODULE_OBJS) $(MODULE_EXTRA_OBJS)
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@$(MKDIR)
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@echo creating $@
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$(NOECHO)rm -f $@
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$(NOECHO)$(AR) rcs $@ $^
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else
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MODULE_OBJECT := $(call TOBUILDDIR,$(MODULE_SRCDIR).mod.o)
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$(MODULE_OBJECT): $(MODULE_OBJS) $(MODULE_EXTRA_OBJS)
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@$(MKDIR)
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@echo linking $@
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$(NOECHO)$(LD) $(GLOBAL_MODULE_LDFLAGS) -r $^ -o $@
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endif
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# track all of the source files compiled
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ALLSRCS += $(MODULE_SRCS)
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# track all the objects built
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ALLOBJS += $(MODULE_OBJS)
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# track the module object for make clean
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GENERATED += $(MODULE_OBJECT)
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# make the rest of the build depend on our output
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ALLMODULE_OBJS := $(ALLMODULE_OBJS) $(MODULE_OBJECT)
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# empty out any vars set here
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MODULE :=
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MODULE_SRCDIR :=
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MODULE_BUILDDIR :=
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MODULE_DEPS :=
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MODULE_SRCS :=
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MODULE_STATIC_LIB :=
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MODULE_OBJS :=
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MODULE_DEFINES :=
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MODULE_OPTFLAGS :=
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MODULE_COMPILEFLAGS :=
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MODULE_CFLAGS :=
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MODULE_CPPFLAGS :=
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MODULE_ASMFLAGS :=
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MODULE_SRCDEPS :=
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MODULE_INCLUDES :=
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MODULE_EXTRA_OBJS :=
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MODULE_CONFIG :=
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MODULE_OBJECT :=
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MODULE_ARM_OVERRIDE_SRCS :=
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