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127 lines
4.1 KiB
Makefile
127 lines
4.1 KiB
Makefile
#
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# Make Linux headers of the host platform available to the program
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#
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include $(call select_from_repositories,lib/import/import-syscall-linux.mk)
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#
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# Manually supply all library search paths of the host compiler to our tool
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# chain.
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#
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HOST_LIB_SEARCH_DIRS = $(shell $(CUSTOM_HOST_CC) $(CC_MARCH) -print-search-dirs | grep libraries |\
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sed "s/.*=//" | sed "s/:/ /g" |\
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sed "s/\/ / /g" | sed "s/\/\$$//")
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#
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# Add search path for 'limits.h'
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#
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# We cannot simply extend 'INC_DIR' because this would give precedence to the
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# host include search paths over Genode search path. The variable HOST_INC_DIR
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# is appended to the include directory list.
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#
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HOST_INC_DIR += $(shell echo "int main() {return 0;}" |\
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LANG=C $(CXX) -x c++ -v -E - 2>&1 |\
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sed '/^\#include <\.\.\.> search starts here:/,/^End of search list/!d' |\
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grep "include-fixed")
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#
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# Add search paths for normal libraries
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#
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CXX_LINK_OPT += $(addprefix -L,$(HOST_LIB_SEARCH_DIRS))
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#
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# Determine ldconfig executable
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#
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# On Ubuntu, /sbin/ is in the PATH variable. Hence we try using the program
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# found via 'command -v'. If it does not return anything (i.e., on Debian),
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# try using the expected location '/sbin/'.
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#
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LDCONFIG := $(firstword $(wildcard $(shell command -v ldconfig) /sbin/ldconfig))
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ifeq ($(LDCONFIG),)
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$(error ldconfig is not found)
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endif
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#
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# Add search paths for shared-library lookup
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#
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# We add all locations of shared libraries present in the ld.cache to our
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# library search path.
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#
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HOST_SO_SEARCH_DIRS := $(sort $(dir $(shell $(LDCONFIG) -p | sed "s/^.* \//\//" | grep "^\/")))
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LINK_ARG_PREFIX := -Wl,
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CXX_LINK_OPT += $(addprefix $(LINK_ARG_PREFIX)-rpath-link $(LINK_ARG_PREFIX),$(HOST_SO_SEARCH_DIRS))
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#
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# Make exceptions work
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#
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CXX_LINK_OPT += -Wl,--eh-frame-hdr
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#
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# Add all libraries and their dependencies specified at the 'LX_LIBS'
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# variable to the linker command line
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#
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ifneq ($(LX_LIBS),)
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LX_LIBS_OPT = $(shell pkg-config --static --libs $(LX_LIBS))
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endif
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#
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# Use the host's startup codes, linker script, and dynamic linker
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#
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LD_TEXT_ADDR ?=
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LD_SCRIPT_STATIC ?=
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EXT_OBJECTS += $(shell $(CUSTOM_HOST_CC) $(CC_MARCH) -print-file-name=crt1.o)
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EXT_OBJECTS += $(shell $(CUSTOM_HOST_CC) $(CC_MARCH) -print-file-name=crti.o)
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EXT_OBJECTS += $(shell $(CUSTOM_CC) $(CC_MARCH) -print-file-name=crtbegin.o)
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EXT_OBJECTS += $(shell $(CUSTOM_CC) $(CC_MARCH) -print-file-name=crtend.o)
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EXT_OBJECTS += $(shell $(CUSTOM_HOST_CC) $(CC_MARCH) -print-file-name=crtn.o)
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LX_LIBS_OPT += -lgcc_s -lsupc++ -lc -lpthread -lgcc
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USE_HOST_LD_SCRIPT = yes
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#
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# We need to manually add the default linker script on the command line in case
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# of standard library use. Otherwise, we were not able to extend it by the
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# stack area section.
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#
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ifeq (x86_64,$(findstring x86_64,$(SPECS)))
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CXX_LINK_OPT += -Wl,--dynamic-linker=/lib64/ld-linux-x86-64.so.2
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LD_SCRIPT_DEFAULT = ldscripts/elf_x86_64.xc
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endif
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ifeq (x86_32,$(findstring x86_32,$(SPECS)))
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CXX_LINK_OPT += -Wl,--dynamic-linker=/lib/ld-linux.so.2
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LD_SCRIPT_DEFAULT = ldscripts/elf_i386.xc
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endif
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ifeq (arm,$(findstring arm,$(SPECS)))
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CXX_LINK_OPT += -Wl,--dynamic-linker=/lib/ld-linux.so.3
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LD_SCRIPT_STATIC = ldscripts/armelf_linux_eabi.xc
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endif
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ifeq (arm_64,$(findstring arm_64,$(SPECS)))
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CXX_LINK_OPT += -Wl,--dynamic-linker=/lib/ld-linux-aarch64.so.1
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LD_SCRIPT_STATIC = /usr/lib/aarch64-linux-gnu/ldscripts/aarch64elf.xc
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endif
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#
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# Because we use the host compiler's libgcc, omit the Genode toolchain's
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# version and put all libraries here we depend on.
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#
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LD_LIBGCC = $(LX_LIBS_OPT)
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# use the host c++ for linking to find shared libraries in DT_RPATH library paths
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LD_CMD = $(CUSTOM_HOST_CXX)
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# disable format-string security checks, which prevent non-literal format strings
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CC_OPT += -Wno-format-security
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#
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# Disable position-independent executables (which are enabled by default on
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# Ubuntu 16.10 or newer)
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#
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CXX_LINK_OPT_NO_PIE = $(shell \
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(echo "int main(){}" | $(CUSTOM_HOST_CXX) -no-pie -x c++ - -o /dev/null >& /dev/null \
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&& echo "-no-pie") || true)
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CXX_LINK_OPT += $(CXX_LINK_OPT_NO_PIE)
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