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3d7b92ea50
This patch make the ABI mechanism available to shared libraries other than Genode's dynamic linker. It thereby allows us to introduce intermediate ABIs at the granularity of shared libraries. This is useful for slow-moving ABIs such as the libc's interface but it will also become handy for the package management. To implement the feature, the build system had to be streamlined a bit. In particular, archive dependencies and shared-lib dependencies are now handled separately, and the global list of 'SHARED_LIBS' is no more. Now, the variable with the same name holds the per-target list of shared libraries used by the target.
146 lines
4.8 KiB
Makefile
146 lines
4.8 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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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), $(SYMBOLS_DIRS))))
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#
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# Sanity check to detect missing library description file
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#
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ifeq ($(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 $(BASE_DIR)/mk/base-libs.mk
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include $(LIB_MK)
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ifdef SHARED_LIB
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LIBS += ldso-startup
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endif
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#
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# Hide archive dependencies of shared libraries from users of the shared
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# library. Library users examine the 'DEP_A_<lib>' variable to determine
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# transitive dependencies. For shared libraries, this variable remains
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# undefined.
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#
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ifdef SHARED_LIB
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DEP_A_VAR_NAME := PRIVATE_DEP_A_$(LIB)
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else
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DEP_A_VAR_NAME := DEP_A_$(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)" >> $(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 ($(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_$l))"; \
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echo "DEP_SO_$(LIB) = $(foreach l,$(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_$(LIB)))\" \\"; \
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echo " BUILD_BASE_DIR=$(BUILD_BASE_DIR) \\"; \
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echo " SHELL=$(SHELL) \\"; \
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echo " INSTALL_DIR=\$$(INSTALL_DIR)"; \
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echo "") >> $(LIB_DEP_FILE)
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ifdef SHARED_LIB
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@(echo "SO_NAME($(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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