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.
184 lines
5.3 KiB
Makefile
184 lines
5.3 KiB
Makefile
#
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# \brief Rules for building software that uses the GNU build tools
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# \author Norman Feske
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# \date 2011-02-02
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#
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# This file is meant to be included by 'target.mk' files. Instead of building
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# a normal Genode target, the 'target.mk' file will then trigger the build
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# of the contrib package specified with the 'PKG' variable. The build
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# consists to the following steps
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#
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# 1. Configuring the package by invoking the package's 'configure' script
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# with the arguments required for cross compiling the package for
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# Genode.
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# 2. Building the package by invoking the 'Makefile' generated by the
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# 'configure' script.
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#
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# Limitations
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# -----------
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#
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# In contrast to the Genode build system, library dependencies are not covered.
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# So if a library used by a package is changed, the package gets not relinked
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# automatically. In this case, 'make clean' must be invoked manually within the
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# build subdirectory of the package.
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#
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#
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# Use name of the directory hosting the 'target.mk' file as 'TARGET'
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# and 'PKG' by default.
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#
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TARGET ?= $(lastword $(subst /, ,$(PRG_DIR)))
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PKG ?= $(TARGET)
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LIBS += posix
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PWD = $(shell pwd)
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#
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# Detect missing preparation ofpackage
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#
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ifeq ($(PKG_DIR),)
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REQUIRES += prepare_$(PKG)
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endif
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#
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# Verbose build
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#
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ifeq ($(VERBOSE),)
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MAKE_VERBOSE = V=1
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CONFIGURE_VERBOSE =
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#
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# Non-verbose build
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#
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else
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MAKE_VERBOSE = -s
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CONFIGURE_VERBOSE = --quiet
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# filter for configure output of package
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CONFIGURE_OUTPUT_FILTER = > stdout.log 2> stderr.log ||\
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(echo "Error: configure script of $(PKG) failed" && \
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cat stderr.log && false)
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# filter for make output of package
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BUILD_OUTPUT_FILTER = 2>&1 | sed "s/^/ [$(PKG)] /"
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endif
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ifeq ($(findstring arm, $(SPECS)), arm)
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CONFIGURE_ARGS += --host arm-none-eabi
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else
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ifeq ($(findstring x86, $(SPECS)), x86)
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CONFIGURE_ARGS += --host x86_64-pc-elf
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endif
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endif
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CONFIGURE_ARGS += --srcdir=$(PKG_DIR)
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CONFIGURE_ARGS += --prefix /
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CONFIG_GUESS_SCRIPT = $(PKG_DIR)/config.guess
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ifneq ($(wildcard $(CONFIG_GUESS_SCRIPT)),)
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CONFIGURE_ARGS += --build $(shell $(CONFIG_GUESS_SCRIPT))
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else
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CONFIGURE_ARGS += --build x86-linux
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endif
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CONFIGURE_ARGS += $(CONFIGURE_VERBOSE)
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LDFLAGS += -nostdlib $(CXX_LINK_OPT) $(CC_MARCH) -Wl,-T$(LD_SCRIPT_DYN) \
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-Wl,-rpath-link=$(PWD) \
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-Wl,--dynamic-linker=$(DYNAMIC_LINKER).lib.so \
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-Wl,--eh-frame-hdr
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LIBTOOLFLAGS = --preserve-dup-deps
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LIBGCC = $(shell $(CC) $(CC_MARCH) -print-libgcc-file-name)
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CPPFLAGS += -nostdinc $(INCLUDES)
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CPPFLAGS += -D_GNU_SOURCE=1
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# flags to be used in both CFLAGS and CXXFLAGS
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COMMON_CFLAGS_CXXFLAGS += -ffunction-sections $(CC_OLEVEL) $(CC_MARCH)
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COMMON_CFLAGS_CXXFLAGS += -g
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CFLAGS += $(COMMON_CFLAGS_CXXFLAGS)
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CXXFLAGS += $(COMMON_CFLAGS_CXXFLAGS)
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#
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# We have to specify 'LINK_ITEMS' twice to resolve inter-library dependencies.
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# Unfortunately, the use of '--start-group' and '--end-group' does not suffice
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# in all cases because 'libtool' strips those arguments from the 'LIBS' variable.
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#
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LDLIBS_A = $(filter %.a, $(sort $(STATIC_LIBS)) $(EXT_OBJECTS) $(LIBGCC))
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LDLIBS_SO = $(addprefix $(PWD)/,$(sort $(SHARED_LIBS)))
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LDLIBS += $(LDLIBS_A) $(LDLIBS_SO) $(LDLIBS_A)
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#
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# Re-configure the Makefile if the Genode build environment changes
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#
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Makefile reconfigure: $(MAKEFILE_LIST)
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#
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# Invoke configure script with the Genode environment
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#
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Makefile reconfigure: env.sh $(SHARED_LIBS)
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@$(MSG_CONFIG)$(TARGET)
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$(VERBOSE)source env.sh && $(PKG_DIR)/configure $(ENV) $(CONFIGURE_ARGS) $(CONFIGURE_OUTPUT_FILTER)
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env.sh:
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$(VERBOSE)rm -f $@
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$(VERBOSE)echo "export CC='$(CC)'" >> $@
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$(VERBOSE)echo "export CXX='$(CXX)'" >> $@
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$(VERBOSE)echo "export LD='$(LD)'" >> $@
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$(VERBOSE)echo "export AR='$(AR)'" >> $@
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$(VERBOSE)echo "export NM='$(NM)'" >> $@
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$(VERBOSE)echo "export RANLIB='$(RANLIB)'" >> $@
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$(VERBOSE)echo "export STRIP='$(STRIP)'" >> $@
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$(VERBOSE)echo "export CPPFLAGS='$(CPPFLAGS)'" >> $@
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$(VERBOSE)echo "export CFLAGS='$(CFLAGS)'" >> $@
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$(VERBOSE)echo "export CXXFLAGS='$(CXXFLAGS)'" >> $@
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$(VERBOSE)echo "export LDFLAGS='$(LDFLAGS)'" >> $@
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$(VERBOSE)echo "export LIBS='$(LDLIBS)'" >> $@
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$(VERBOSE)echo "export LIBTOOLFLAGS='$(LIBTOOLFLAGS)'" >> $@
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$(VERBOSE)echo "export PS1='<gnu_build>'" >> $@
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#
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# Invoke the 'Makefile' generated by the configure script
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#
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# The 'MAN=' argument prevent manual pages from being created. This would
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# produce an error when the package uses the 'help2man' tool. This tool
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# tries to extract the man page of a program by executing it with the
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# '--help' argument on the host. However, we cannot run Genode binaries
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# this way.
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#
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built.tag: env.sh Makefile
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@$(MSG_BUILD)$(TARGET)
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$(VERBOSE)source env.sh && $(MAKE) $(MAKE_ENV) $(MAKE_VERBOSE) MAN= $(BUILD_OUTPUT_FILTER)
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@touch $@
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INSTALL_TARGET ?= install-strip
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installed.tag: built.tag
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@$(MSG_INST)$(TARGET)
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$(VERBOSE)source env.sh && $(MAKE) $(MAKE_ENV) $(MAKE_VERBOSE) $(INSTALL_TARGET) DESTDIR=$(PWD)/install MAN= >> stdout.log 2>> stderr.log
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$(VERBOSE)rm -f $(INSTALL_DIR)/$(TARGET)
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$(VERBOSE)ln -sf $(PWD)/install $(INSTALL_DIR)/$(TARGET)
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@touch $@
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$(TARGET): installed.tag
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@touch $@
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#
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# The clean rule is expected to be executed within the 3rd-party build
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# directory. The check should prevent serious damage if this condition
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# is violated (e.g., while working on the build system).
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#
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ifeq ($(notdir $(PWD)),$(notdir $(PRG_DIR)))
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clean_dir:
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$(VERBOSE)rm -rf $(PWD)/* $(PWD)/.*
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clean_prg_objects: clean_dir
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endif
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