176 lines
6.2 KiB
Makefile
176 lines
6.2 KiB
Makefile
#
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# Generic rules to build file types from other file types and other
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# common functionaly that is needed to build library or program targets.
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#
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#
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# Collect object files and avoid duplicates (by using 'sort')
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#
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SRC_O += $(addprefix binary_,$(addsuffix .o,$(notdir $(SRC_BIN))))
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SRC = $(sort $(SRC_C) $(SRC_CC) $(SRC_ADB) $(SRC_ADS) $(SRC_RS) $(SRC_S) $(SRC_O))
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OBJECTS = $(addsuffix .o,$(basename $(SRC)))
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#
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# Create sub directories for objects files corresponding to the sub directories
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# of their respective source files
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#
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SUB_DIRS = $(sort $(dir $(OBJECTS)))
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ifneq ($(SUB_DIRS),./)
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$(OBJECTS): $(filter-out $(wildcard $(SUB_DIRS)), $(SUB_DIRS))
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endif
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.PHONY: $(SUB_DIRS)
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$(SUB_DIRS):
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$(VERBOSE)mkdir -p $@
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#
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# Make sure that we rebuild object files and host tools after Makefile changes
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#
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$(wildcard $(OBJECTS)) $(HOST_TOOLS): $(filter-out $(LIB_PROGRESS_LOG),$(MAKEFILE_LIST))
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INCLUDES := $(addprefix -I,$(wildcard $(ALL_INC_DIR)))
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#
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# If one of the 3rd-party ports used by the target changed, we need to rebuild
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# all object files and host tools because they may include sources from the
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# 3rd-party port.
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#
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# The 'PORT_HASH_FILES' variable is populated as side effect of calling the
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# 'select_from_ports' function.
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#
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$(OBJECTS) $(HOST_TOOLS): $(PORT_HASH_FILES)
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#
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# Include dependency files for the corresponding object files except
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# when cleaning
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#
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ifneq ($(filter-out $(MAKECMDGOALS),clean),)
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-include $(OBJECTS:.o=.d)
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endif
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%.o: %.c
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$(MSG_COMP)$@
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$(VERBOSE)$(CC) $(CC_DEF) $(CC_C_OPT) $(INCLUDES) -c $< -o $@
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%.o: %.cc
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$(MSG_COMP)$@
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$(VERBOSE)$(CXX) $(CXX_DEF) $(CC_CXX_OPT) $(INCLUDES) -c $< -o $@
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ifeq ($(COVERAGE),yes)
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$(VERBOSE)mkdir -p $(INSTALL_DIR)/gcov_data/$(TARGET)/$(dir $@)
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$(VERBOSE)ln -sf $(CURDIR)/$(@:.o=.gcno) $(INSTALL_DIR)/gcov_data/$(TARGET)/$(@:.o=.gcno)
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endif
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%.o: %.cpp
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$(MSG_COMP)$@
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$(VERBOSE)$(CXX) $(CXX_DEF) $(CC_CXX_OPT) $(INCLUDES) -c $< -o $@
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%.o: %.s
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$(MSG_ASSEM)$@
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$(VERBOSE)$(CC) $(CC_DEF) $(CC_C_OPT) $(INCLUDES) -c $< -o $@
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#
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# Compiling Ada source codes
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#
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# The mandatory runtime directories 'adainclude' and 'adalib' are expected in
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# the program directory.
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#
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#
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# We need to override these to build the ada runtime
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#
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CUSTOM_ADA_FLAGS ?= --RTS=$(ADA_RTS)
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CUSTOM_ADA_OPT ?= $(CC_ADA_OPT) -gnatef
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CUSTOM_ADA_INCLUDE ?= -I- $(INCLUDES)
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%.ali %.o: %.adb
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$(MSG_COMP)$@
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$(VERBOSE)$(CUSTOM_ADA_CC) $(CUSTOM_ADA_FLAGS) $(CUSTOM_ADA_OPT) $(CUSTOM_ADA_INCLUDE) -c $<
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$(VERBOSE)$(ALI2DEP) $(dir $<) $(ALL_INC_DIR) $*.ali
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%.ali %.o: %.ads
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$(MSG_COMP)$@
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$(VERBOSE)$(CUSTOM_ADA_CC) $(CUSTOM_ADA_FLAGS) $(CUSTOM_ADA_OPT) $(CUSTOM_ADA_INCLUDE) -c $<
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$(VERBOSE)$(ALI2DEP) $(dir $<) $(ALL_INC_DIR) $*.ali
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#
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# Assembler files that must be preprocessed are fed to the C compiler.
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#
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%.o: %.S
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$(MSG_COMP)$@
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$(VERBOSE)$(CC) $(CC_DEF) $(CC_OPT) -D__ASSEMBLY__ $(INCLUDES) -c $< -o $@
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#
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# Link binary data
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#
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# We transform binary data into an object file by using the 'incbin' directive
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# of the GNU assembler. This enables us to choose a any label for the binary
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# data (in contrast to 'ld -r -oformat default -b binary', which generates the
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# label from the input path name) and to align the binary data as required on
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# some architectures (e.g., ARM).
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#
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symbol_name = _binary_$(subst -,_,$(subst .,_,$(subst binary_,,$(subst .o,,$(notdir $@)))))
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binary_%.o: %
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$(MSG_CONVERT)$@
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$(VERBOSE)echo ".global $(symbol_name)_start, $(symbol_name)_end; .data; .align 4; $(symbol_name)_start:; .incbin \"$<\"; $(symbol_name)_end:" |\
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$(AS) $(AS_OPT) -f -o $@ -
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#
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# Generate assembler file from symbol list
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#
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# For undefined symbols (type U), we create a hard dependency by referencing
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# the symbols from the assembly file. The reference is created in the form of
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# a '.long' value with the address of the symbol. On x86_64, this is not
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# possible for PIC code. Hence, we reference the symbol via a PIC-compatible
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# movq instruction instead.
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#
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# If we declared the symbol as '.global' without using it, the undefined symbol
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# gets discarded at link time unless it is directly referenced by the target.
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# This is a problem in situations where the undefined symbol is resolved by an
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# archive rather than the target. I.e., when linking posix.lib.a (which
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# provides 'Libc::Component::construct'), the 'construct' function is merely
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# referenced by the libc.lib.so's 'Component::construct' function. But this
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# reference apparently does not suffice to keep the posix.lib.a's symbol. By
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# adding a hard dependency, we force the linker to resolve the symbol and don't
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# drop posix.lib.a.
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#
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ASM_SYM_DEPENDENCY := .long \1
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ifeq ($(filter-out $(SPECS),x86_64),)
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ASM_SYM_DEPENDENCY := movq \1@GOTPCREL(%rip), %rax
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endif
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%.symbols.s: %.symbols
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$(MSG_CONVERT)$@
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$(VERBOSE)\
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sed -e "s/^\(\w\+\) D \(\w\+\)\$$/.data; .global \1; .type \1,%object; .size \1,\2; \1: .skip 1/" \
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-e "s/^\(\w\+\) V/.data; .weak \1; .type \1,%object; \1: .skip 1/" \
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-e "s/^\(\w\+\) T/.text; .global \1; .type \1,%function; \1:/" \
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-e "s/^\(\w\+\) R \(\w\+\)\$$/.section .rodata; .global \1; .type \1,%object; .size \1,\2; \1:/" \
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-e "s/^\(\w\+\) W/.text; .weak \1; .type \1,%function; \1:/" \
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-e "s/^\(\w\+\) B \(\w\+\)\$$/.bss; .global \1; .type \1,%object; .size \1,\2; \1:/" \
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-e "s/^\(\w\+\) U/.text; .global \1; $(ASM_SYM_DEPENDENCY)/" \
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$< > $@
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#
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# Create local symbol links for the used shared libraries
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#
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# Depending on whether an ABI stub for a given shared library exists, we link
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# the target against the ABI stub or the real shared library.
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#
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# We check if the symbolic links are up-to-date by filtering all links that
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# already match the current shared library targets from the list. If the list
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# is not empty we flag 'SHARED_LIBS' as phony to make sure that the symbolic
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# links are recreated. E.g., if a symbol list is added for library, the next
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# time a user of the library is linked, the ABI stub should be used instead of
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# the library.
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#
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select_so = $(firstword $(wildcard $(LIB_CACHE_DIR)/$(1:.lib.so=)/$(1:.lib.so=).abi.so \
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$(LIB_CACHE_DIR)/$(1:.lib.so=)/$(1:.lib.so=).lib.so))
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ifneq ($(filter-out $(foreach s,$(SHARED_LIBS),$(realpath $s)), \
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$(foreach s,$(SHARED_LIBS),$(call select_so,$s))),)
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.PHONY: $(SHARED_LIBS)
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endif
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$(SHARED_LIBS):
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$(VERBOSE)ln -sf $(call select_so,$@) $@
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