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152 lines
4.7 KiB
Makefile
152 lines
4.7 KiB
Makefile
#
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# This file determines dependencies of a library from other libraries
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#
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# The following variables must be defined by the caller:
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#
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# VERBOSE - controls the make verboseness
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# VERBOSE_DIR - verboseness of directory change messages
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# VERBOSE_MK - verboseness of make calls
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# REPOSITORIES - source code repositories to use
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# BASE_DIR - base directory of build system repository
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# TARGET_DIR - target build directory
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# BUILD_BASE_DIR - build directory with build config
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# LIB_CACHE_DIR - destination directory for object files
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# LIB_PROGRESS_LOG - library build log file
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# BUILD_LIBS - list of libraries to build (without .lib.a or .lib.so suffix)
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# INSTALL_DIR - destination directory for installing shared libraries
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#
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#
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# Utility for selecting files from the list of repositories
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#
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select_from_repositories = $(firstword $(foreach REP,$(REPOSITORIES),$(wildcard $(REP)/$(1))))
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#
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# Generate dependencies only for those libs that are
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# not already contained in the library build log
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#
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include $(LIB_PROGRESS_LOG)
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ifneq ($(filter $(LIB),$(LIBS_READY)),)
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already_visited:
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@true
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else
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all: append_lib_to_progress_log
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endif
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append_lib_to_progress_log:
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@echo "LIBS_READY += $(LIB)" >> $(LIB_PROGRESS_LOG)
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LIB_MK_DIRS = $(foreach REP,$(REPOSITORIES),$(addprefix $(REP)/lib/mk/,$(SPECS)) $(REP)/lib/mk)
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#
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# Of all possible file locations, use the (first) one that actually exist.
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#
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LIB_MK = $(firstword $(wildcard $(addsuffix /$(LIB).mk,$(LIB_MK_DIRS))))
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#
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# Sanity check to detect missing library description file
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#
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ifeq ($(LIB_MK),)
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all: warn_missing_lib_mk
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else
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all: check_unsatisfied_requirements
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endif
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warn_missing_lib_mk: generate_lib_rule_for_defect_library
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@$(ECHO) "Library-description file $(DARK_COL)$(LIB).mk$(DEFAULT_COL) is missing"
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#
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# Determine the repository base directory from the absolute pathname
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# of the choosen libname.mk file. We need to specify the override
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# command because REP_DIR was first set by prg.mk when building a
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# program target. The repository of a library could be a different
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# one.
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#
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# Finally, we strip the trailing slash from the path. The slash was
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# used to match the whole directory in 'findstring'.
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#
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override REP_DIR := $(firstword $(foreach REP,$(REPOSITORIES),$(findstring $(REP)/,$(LIB_MK))))
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override REP_DIR := $(REP_DIR:/=)
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include $(LIB_MK)
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include $(BASE_DIR)/mk/base-libs.mk
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#
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# Libraries from the library depends on
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#
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# For shared libraries, we have to make sure to build ldso support before
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# building a shared library.
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#
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ifdef SHARED_LIB
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LIBS += ldso-startup
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ifeq ($(LIB),$(DYNAMIC_LINKER))
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LIBS += $(BASE_LIBS)
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else
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LIBS := $(filter-out $(BASE_LIBS),$(LIBS))
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LIBS += $(DYNAMIC_LINKER)
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endif
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DEP_VAR_NAME := DEP_$(LIB).lib.so
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else
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DEP_VAR_NAME := DEP_$(LIB).lib
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endif
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#
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# Add platform preparation dependency
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#
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# We make each leaf library depend on a library called 'platform'. This way,
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# the 'platform' library becomes a prerequisite of all other libraries. The
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# 'platform' library is supposed to take precautions for setting up
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# platform-specific build environments, e.g., preparing kernel API headers.
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#
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ifeq ($(LIBS),)
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ifneq ($(LIB),platform)
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LIBS += platform
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endif
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endif
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#
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# Check if the requirements of the target are satisfied
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#
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UNSATISFIED_REQUIREMENTS = $(filter-out $(SPECS),$(REQUIRES))
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ifneq ($(UNSATISFIED_REQUIREMENTS),)
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check_unsatisfied_requirements: warn_unsatisfied_requirements
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else
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check_unsatisfied_requirements: generate_lib_rule
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endif
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warn_unsatisfied_requirements: generate_lib_rule_for_defect_library
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@$(ECHO) "Skip library $(LIB) because it requires $(DARK_COL)$(UNSATISFIED_REQUIREMENTS)$(DEFAULT_COL)"
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generate_lib_rule_for_defect_library:
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@echo "INVALID_DEPS += $(LIB)" >> $(LIB_DEP_FILE)
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@echo "" >> $(LIB_DEP_FILE)
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LIBS_TO_VISIT = $(filter-out $(LIBS_READY),$(LIBS))
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generate_lib_rule:
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ifneq ($(LIBS),)
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@(echo "$(DEP_VAR_NAME) = $(foreach l,$(LIBS),$l.lib \$$(DEP_$l.lib))"; \
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echo "") >> $(LIB_DEP_FILE)
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endif
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@(echo "$(LIB).lib: $(addsuffix .lib,$(LIBS))"; \
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echo " @\$$(MKDIR) -p \$$(LIB_CACHE_DIR)/$(LIB)"; \
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echo " \$$(VERBOSE_MK)\$$(MAKE) $(VERBOSE_DIR) -C \$$(LIB_CACHE_DIR)/$(LIB) -f \$$(BASE_DIR)/mk/lib.mk \\"; \
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echo " REP_DIR=$(REP_DIR) \\"; \
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echo " LIB_MK=$(LIB_MK) \\"; \
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echo " LIB=$(LIB) \\"; \
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echo " DEPS=\"\$$($(DEP_VAR_NAME))\" \\"; \
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echo " BUILD_BASE_DIR=$(BUILD_BASE_DIR) \\"; \
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echo " SHELL=$(SHELL) \\"; \
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echo " SHARED_LIBS=\"\$$(SHARED_LIBS)\"\\"; \
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echo " INSTALL_DIR=\$$(INSTALL_DIR)"; \
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echo "") >> $(LIB_DEP_FILE)
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@for i in $(LIBS_TO_VISIT); do \
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$(MAKE) $(VERBOSE_DIR) -f $(BASE_DIR)/mk/dep_lib.mk REP_DIR=$(REP_DIR) LIB=$$i; done
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ifdef SHARED_LIB
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@(echo "SHARED_LIBS += $(LIB)"; \
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echo "") >> $(LIB_DEP_FILE)
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endif
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