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28117fee12
Rust relies on atomic builtins, which are not implemented in libgcc for ARM. One is implemented in rust, which is sufficient to get the current rust test to run. Issue #1899
230 lines
6.3 KiB
Makefile
230 lines
6.3 KiB
Makefile
##
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## Rules for building a program target
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##
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## The following variables must be passed when calling this file:
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##
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## BASE_DIR - base directory of the build system
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## REP_DIR - source repository of the program
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## PRG_REL_DIR - directory of the program relative to 'src/'
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## REPOSITORIES - repositories providing libs and headers
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## INSTALL_DIR - final install location
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## VERBOSE - build verboseness modifier
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## VERBOSE_DIR - verboseness modifier for changing directories
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## VERBOSE_MK - verboseness of make calls
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## LIB_CACHE_DIR - library build cache location
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##
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#
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# Prevent target.mk rules to be executed as default rule
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#
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all:
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#
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# Tell rust to make an object file instead of anything else
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#
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CC_RUSTC_OPT += --emit obj
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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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# Include target build instructions
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#
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PRG_DIR := $(REP_DIR)/src/$(PRG_REL_DIR)
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include $(PRG_DIR)/target.mk
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#
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# Include lib-import description files
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#
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include $(foreach LIB,$(LIBS),$(call select_from_repositories,lib/import/import-$(LIB).mk))
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#
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# Include specifics for platforms, kernel APIs, etc.
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#
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include $(SPEC_FILES)
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vpath % $(PRG_DIR)
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include $(BASE_DIR)/mk/global.mk
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#
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# Assemble linker options for static and dynamic linkage
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#
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ifneq ($(LD_TEXT_ADDR),)
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CXX_LINK_OPT += -Wl,-Ttext=$(LD_TEXT_ADDR)
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endif
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#
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# Supply machine-dependent arguments to the linker
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#
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CXX_LINK_OPT += $(CC_MARCH)
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#
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# Generic linker script for statically linked binaries
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#
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LD_SCRIPT_STATIC ?= $(call select_from_repositories,src/ld/genode.ld)
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include $(BASE_DIR)/mk/generic.mk
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include $(BASE_DIR)/mk/base-libs.mk
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ifeq ($(INSTALL_DIR),)
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all: message $(TARGET)
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else
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all: message $(INSTALL_DIR)/$(TARGET)
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endif
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@true # prevent nothing-to-be-done message
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.PHONY: message
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message:
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$(MSG_PRG)$(PRG_REL_DIR)/$(TARGET)
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#
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# Enforce unconditional call of gnatmake rule when compiling Ada sources
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#
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# Citation from texinfo manual for make:
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#
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# If a rule has no prerequisites or commands, and the target of the rule
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# is a nonexistent file, then `make' imagines this target to have been
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# updated whenever its rule is run. This implies that all targets
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# depending on this one will always have their commands run.
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#
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FORCE:
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$(SRC_ADA:.adb=.o): FORCE
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#
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# The 'sort' is needed to ensure the same link order regardless
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# of the find order, which uses to vary among different systems.
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#
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SHARED_LIBS := $(foreach l,$(DEPS:.lib=),$(LIB_CACHE_DIR)/$l/$l.lib.so)
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SHARED_LIBS := $(sort $(wildcard $(SHARED_LIBS)))
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#
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# Use CXX for linking
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#
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LD_CMD ?= $(CXX)
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LD_CMD += $(CXX_LINK_OPT)
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ifeq ($(SHARED_LIBS),)
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LD_SCRIPTS := $(LD_SCRIPT_STATIC)
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FILTER_DEPS := $(DEPS:.lib=)
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else
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#
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# Add a list of symbols that shall always be added to the dynsym section
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#
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LD_OPT += --dynamic-list=$(call select_from_repositories,src/ld/genode_dyn.dl)
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LD_SCRIPTS := $(LD_SCRIPT_DYN)
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LD_CMD += -Wl,--dynamic-linker=$(DYNAMIC_LINKER).lib.so \
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-Wl,--eh-frame-hdr
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#
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# Filter out the base libraries since they will be provided by the LDSO library
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#
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FILTER_DEPS := $(filter-out $(BASE_LIBS),$(DEPS:.lib=))
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SHARED_LIBS += $(LIB_CACHE_DIR)/$(DYNAMIC_LINKER)/$(DYNAMIC_LINKER).lib.so
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#
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# Build program position independent as well
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#
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CC_OPT_PIC ?= -fPIC
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CC_OPT += $(CC_OPT_PIC)
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endif
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#
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# LD_SCRIPT_PREFIX is needed as 'addprefix' chokes on prefixes containing
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# commas othwerwise. For compatibilty with older tool chains, we use two -Wl
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# parameters for both components of the linker command line.
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#
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LD_SCRIPT_PREFIX = -Wl,-T -Wl,
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#
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# LD_SCRIPTS may be a list of linker scripts (e.g., in base-linux). Further,
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# we use the default linker script if none was specified - 'addprefix' expands
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# to empty string on empty input.
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#
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LD_CMD += $(addprefix $(LD_SCRIPT_PREFIX), $(LD_SCRIPTS))
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STATIC_LIBS := $(foreach l,$(FILTER_DEPS),$(LIB_CACHE_DIR)/$l/$l.lib.a)
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STATIC_LIBS := $(sort $(wildcard $(STATIC_LIBS)))
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#
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# --whole-archive does not work with rlibs
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#
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RUST_LIBS := $(foreach l,$(FILTER_DEPS),$(LIB_CACHE_DIR)/$l/$l.rlib)
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RUST_LIBS := $(sort $(wildcard $(RUST_LIBS)))
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SHORT_RUST_LIBS := $(subst $(LIB_CACHE_DIR),$$libs,$(RUST_LIBS))
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#
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# For hybrid Linux/Genode programs, prevent the linkage Genode's cxx and base
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# library because these functionalities are covered by the glibc or by
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# 'src/platform/lx_hybrid.cc'.
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#
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ifeq ($(USE_HOST_LD_SCRIPT),yes)
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STATIC_LIBS := $(filter-out $(LIB_CACHE_DIR)/startup/startup.lib.a, $(STATIC_LIBS))
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STATIC_LIBS := $(filter-out $(LIB_CACHE_DIR)/base/base.lib.a, $(STATIC_LIBS))
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STATIC_LIBS := $(filter-out $(LIB_CACHE_DIR)/cxx/cxx.lib.a, $(STATIC_LIBS))
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endif
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#
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# We need the linker option '--whole-archive' to make sure that all library
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# constructors marked with '__attribute__((constructor))' end up int the
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# binary. When not using this option, the linker goes through all libraries
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# to resolve a symbol and, if it finds the symbol, stops searching. This way,
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# object files that are never explicitly referenced (such as library
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# constructors) would not be visited at all.
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#
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# Furthermore, the '--whole-archive' option reveals symbol ambiguities, which
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# would go undetected if the search stops after the first match.
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#
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LINK_ITEMS := $(OBJECTS) $(STATIC_LIBS) $(SHARED_LIBS)
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SHORT_LINK_ITEMS := $(subst $(LIB_CACHE_DIR),$$libs,$(LINK_ITEMS))
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#
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# Trigger the build of host tools
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#
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$(LINK_ITEMS) $(TARGET): $(HOST_TOOLS)
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LD_CMD += -Wl,--whole-archive -Wl,--start-group
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LD_CMD += $(SHORT_LINK_ITEMS)
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LD_CMD += $(EXT_OBJECTS)
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LD_CMD += -Wl,--no-whole-archive
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LD_CMD += $(SHORT_RUST_LIBS)
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LD_CMD += -Wl,--end-group
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#
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# Link libgcc to each program
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#
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LD_LIBGCC ?= $(shell $(CC) $(CC_MARCH) -print-libgcc-file-name)
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LD_CMD += $(LD_LIBGCC)
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#
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# Skip final linking if no objects are involved, i.e. no 'SRC' files are
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# specified in the 'target.mk' file. This applies for pseudo 'target.mk'
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# files that invoke a 3rd-party build system by providing local rule for
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# $(TARGET).
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#
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ifneq ($(OBJECTS),)
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$(TARGET): $(LINK_ITEMS) $(wildcard $(LD_SCRIPTS))
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$(MSG_LINK)$(TARGET)
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$(VERBOSE)libs=$(LIB_CACHE_DIR); $(LD_CMD) -o $@
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$(INSTALL_DIR)/$(TARGET): $(TARGET)
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$(VERBOSE)ln -sf $(CURDIR)/$(TARGET) $@
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else
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$(TARGET):
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$(INSTALL_DIR)/$(TARGET): $(TARGET)
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endif
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clean_prg_objects:
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$(MSG_CLEAN)$(PRG_REL_DIR)
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$(VERBOSE)$(RM) -f $(OBJECTS) $(OBJECTS:.o=.d) $(TARGET)
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$(VERBOSE)$(RM) -f *.d *.i *.ii *.s *.ali
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clean: clean_prg_objects
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