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The build system automatically announces the names of shared libraries as build artifacts. However, in rare cases, it is required to manually define them. In particular, the 'ld' stub library plays no role at runtime and should not be integrated into the boot image. This patch adds a customization hook following the same pattern as used for target.mk files, namely the BUILD_ARTIFACTS variable. If defined, its value is taken as the list of boot artifacts generated by the library-description file. Issue #4368
167 lines
5.4 KiB
Makefile
167 lines
5.4 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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# DEBUG_DIR - destination directory for installing unstripped shared libraries
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#
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ACCUMULATE_MISSING_PORTS = 1
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#
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# Include common utility functions
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#
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include $(BASE_DIR)/mk/util.inc
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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/spec/, $(SPECS)) $(REP)/lib/mk)
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SYMBOLS_DIRS = $(foreach REP,$(REPOSITORIES),$(addprefix $(REP)/lib/symbols/spec/,$(SPECS)) $(REP)/lib/symbols)
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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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SYMBOLS = $(firstword $(wildcard $(addsuffix /$(LIB), $(SYMBOLS_DIRS))))
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ifneq ($(SYMBOLS),)
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SHARED_LIB := yes
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endif
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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 ($(sort $(LIB_MK) $(SYMBOLS)),)
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all: warn_missing_lib_mk
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else
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all: check_unsatisfied_requirements
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endif
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warn_missing_lib_mk: generate_lib_rule_for_defect_library
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@$(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 $(BASE_DIR)/mk/base-libs.mk
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include $(LIB_MK)
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ifdef SHARED_LIB
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BUILD_ARTIFACTS ?= $(LIB).lib.so
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endif
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# record creation of shared library build artifact
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append_artifact_to_progress_log:
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@( $(foreach A,$(BUILD_ARTIFACTS),\
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echo -e "\n# Build artifact $A\n";) true \
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) >> $(LIB_PROGRESS_LOG)
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append_lib_to_progress_log: append_artifact_to_progress_log
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ifdef SHARED_LIB
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LIBS += ldso_so_support
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endif
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#
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# Hide archive dependencies of shared libraries from users of the shared
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# library. Library users examine the 'DEP_A_<lib>' variable to determine
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# transitive dependencies. For shared libraries, this variable remains
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# undefined.
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#
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ifdef SHARED_LIB
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DEP_A_VAR_NAME := PRIVATE_DEP_A_$(LIB)
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DEP_SO_VAR_NAME := PRIVATE_DEP_SO_$(LIB)
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else
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DEP_A_VAR_NAME := DEP_A_$(LIB)
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DEP_SO_VAR_NAME := DEP_SO_$(LIB)
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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 += $(LIB)"; \
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echo "$(LIB).lib:"; \
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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 ($(DEP_MISSING_PORTS),)
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@(echo "MISSING_PORTS += $(DEP_MISSING_PORTS)"; \
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echo "") >> $(LIB_DEP_FILE)
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endif
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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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ifneq ($(LIBS),)
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@(echo "$(DEP_A_VAR_NAME) = $(foreach l,$(LIBS),\$${ARCHIVE_NAME($l)} \$$(DEP_A_$l))"; \
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echo "$(DEP_SO_VAR_NAME) = $(foreach l,$(LIBS),\$${SO_NAME($l)} \$$(DEP_SO_$l))"; \
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echo "") >> $(LIB_DEP_FILE)
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endif
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@(echo "$(LIB).lib: check_ports $(addsuffix .lib,$(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 " SYMBOLS=$(SYMBOLS) \\"; \
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echo " LIB=$(LIB) \\"; \
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echo " ARCHIVES=\"\$$(sort \$$($(DEP_A_VAR_NAME)))\" \\"; \
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echo " SHARED_LIBS=\"\$$(sort \$$($(DEP_SO_VAR_NAME)))\" \\"; \
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echo " BUILD_BASE_DIR=$(BUILD_BASE_DIR) \\"; \
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echo " SHELL=$(SHELL) \\"; \
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echo " INSTALL_DIR=\$$(INSTALL_DIR) \\"; \
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echo " DEBUG_DIR=\$$(DEBUG_DIR)"; \
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echo "") >> $(LIB_DEP_FILE)
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ifdef SHARED_LIB
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@(echo "SO_NAME($(LIB)) := $(LIB).lib.so"; \
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echo "") >> $(LIB_DEP_FILE)
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else
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@(echo "ARCHIVE_NAME($(LIB)) := $(LIB).lib.a"; \
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echo "") >> $(LIB_DEP_FILE)
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endif
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