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
218 lines
5.8 KiB
Makefile
218 lines
5.8 KiB
Makefile
##
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## Rules for building a library 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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## REPOSITORIES - repositories providing libs and headers
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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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## BUILD_BASE_DIR - base of build directory tree
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## LIB_CACHE_DIR - library build cache location
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## INSTALL_DIR - program target build directory
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## DEPS - library dependencies
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## REP_DIR - repository where the library resides
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## CONTRIB_DIR - location of ported 3rd-party source codes
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##
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include $(BASE_DIR)/mk/base-libs.mk
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#
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# Prevent <libname>.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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# Make a rlib or dylib instead of object file
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#
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ifndef SHARED_LIB
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CC_RUSTC_OPT += --crate-type rlib
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else
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CC_RUSTC_OPT += --crate-type dylib
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endif
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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 specifics, for example platform, kernel-api etc.
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#
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include $(SPEC_FILES)
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#
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# Include library build instructions
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#
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# We set the 'called_from_lib_mk' variable to allow the library description file
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# to respond to the build pass.
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#
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BACKUP_INC_DIR := $(INC_DIR)
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called_from_lib_mk = yes
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include $(LIB_MK)
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#
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# Sanity check for INC_DIR overrides
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#
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ifneq ($(filter-out $(INC_DIR),$(BACKUP_INC_DIR)),)
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all: error_inc_dir_override
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endif
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error_inc_dir_override:
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@$(ECHO) "Error: $(LIB_MK) overrides INC_DIR instead of appending" ; false
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#
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# Include lib-import descriptions of all used libraries and the target library
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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 global definitions
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#
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include $(BASE_DIR)/mk/global.mk
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#
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# Name of <libname>.lib.a or <libname>.lib.so file to create
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#
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ifdef SHARED_LIB
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LIB_SO := $(addsuffix .lib.so,$(LIB))
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INSTALL_SO := $(INSTALL_DIR)/$(LIB_SO)
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LIB_FILENAME := $(LIB_SO)
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else ifdef SRC_RS
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LIB_RLIB := $(addsuffix .rlib,$(LIB))
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LIB_FILENAME := $(LIB_RLIB)
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else
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LIB_A := $(addsuffix .lib.a,$(LIB))
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LIB_FILENAME := $(LIB_A)
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endif
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LIB_TAG := $(addsuffix .lib.tag,$(LIB))
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#
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# Link libgcc to shared libraries
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#
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# For static libraries, libgcc is not needed because it will be linked
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# against the final target.
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#
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ifdef SHARED_LIB
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LIBGCC = $(shell $(CC) $(CC_MARCH) -print-libgcc-file-name)
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endif
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#
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# Build libraries position-independent
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#
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# This option is required for building shared objects but also for static
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# libraries that are (potentially) linked against shared objects. Hence,
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# we build all libraries with '-fPIC'.
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#
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CC_OPT_PIC ?= -fPIC
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CC_OPT += $(CC_OPT_PIC)
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#
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# Print message for the currently built library
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#
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all: message
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message:
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$(MSG_LIB)$(LIB)
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#
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# Trigger the creation of the <libname>.lib.a or <libname>.lib.so file
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#
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all: $(LIB_TAG)
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#
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# Trigger the build of host tools
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#
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# We make '$(LIB_TAG)' depend on the host tools to support building host tools
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# from pseudo libraries with no actual source code. In this case '$(OBJECTS)'
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# is empty.
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#
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$(LIB_TAG) $(OBJECTS): $(HOST_TOOLS)
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$(LIB_TAG): $(LIB_A) $(LIB_SO) $(INSTALL_SO) $(LIB_RLIB)
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@touch $@
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include $(BASE_DIR)/mk/generic.mk
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#
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# Rule to build the <libname>.lib.a file
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#
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# Use $(OBJECTS) instead of $^ for specifying the list of objects to include
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# in the archive because $^ may also contain non-object phony targets, e.g.,
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# used by the integration of Qt's meta-object compiler into the Genode
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# build system.
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#
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$(LIB_A): $(OBJECTS)
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$(MSG_MERGE)$(LIB_A)
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$(VERBOSE)$(AR) -rc $@ $(OBJECTS)
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#
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# Rename from object to rlib
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#
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$(LIB_RLIB): $(OBJECTS)
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$(MSG_RENAME)$(LIB_RLIB)
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$(VERBOSE)cp $(OBJECTS) $(LIB_RLIB)
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#
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# Don't link base libraries against shared libraries except for ld.lib.so
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#
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ifdef SHARED_LIB
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ifneq ($(LIB),$(DYNAMIC_LINKER))
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override DEPS := $(filter-out $(BASE_LIBS:=.lib),$(DEPS))
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endif
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endif
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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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STATIC_LIBS := $(foreach l,$(DEPS:.lib=),$(LIB_CACHE_DIR)/$l/$l.lib.a)
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STATIC_LIBS := $(sort $(wildcard $(STATIC_LIBS)))
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STATIC_LIBS_BRIEF := $(subst $(LIB_CACHE_DIR),$$libs,$(STATIC_LIBS))
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#
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# Rule to build the <libname>.lib.so file
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#
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# The 'LIBS' variable may contain static and shared sub libraries. When linking
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# the shared library, we have to link all shared sub libraries to the library
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# to store the library-dependency information in the library. Because we do not
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# know which sub libraries are static or shared prior calling 'build_libs.mk',
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# we use an explicit call to the 'lib_so_wildcard' macro to determine the subset
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# of libraries that are shared.
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#
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# The 'ldso-startup/startup.o' object file, which contains the support code for
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# constructing static objects must be specified as object file to prevent the
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# linker from garbage-collecting it.
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#
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USED_SHARED_LIBS := $(filter $(DEPS:.lib=),$(SHARED_LIBS))
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USED_SO_FILES := $(foreach s,$(USED_SHARED_LIBS),$(LIB_CACHE_DIR)/$s/$s.lib.so)
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#
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# Don't link ld libary against shared objects
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#
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USED_SO_FILES := $(filter-out %$(DYNAMIC_LINKER).lib.so,$(USED_SO_FILES))
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#
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# Default entry point of shared libraries
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#
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ENTRY_POINT ?= 0x0
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$(LIB_SO): $(STATIC_LIBS) $(OBJECTS) $(wildcard $(LD_SCRIPT_SO))
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$(MSG_MERGE)$(LIB_SO)
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$(VERBOSE)libs=$(LIB_CACHE_DIR); $(LD) -o $(LIB_SO) -shared --eh-frame-hdr \
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$(LD_OPT) \
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-T $(LD_SCRIPT_SO) \
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--entry=$(ENTRY_POINT) \
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--whole-archive \
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--start-group \
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$(USED_SO_FILES) $(STATIC_LIBS_BRIEF) $(OBJECTS) \
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--end-group \
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--no-whole-archive \
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$(LIBGCC)
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$(INSTALL_SO):
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$(VERBOSE)ln -sf $(CURDIR)/$(LIB_SO) $@
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