genode/base/mk/dep_lib.mk
2012-03-06 17:09:54 +01:00

152 lines
4.7 KiB
Makefile

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