mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-26 17:01:07 +00:00
522a86e54a
With this patch hybrid applications get linked with the Genode GCC's 'crtbegin.o' and 'crtend.o' files instead of the host GCC's versions to avoid compatibility problems. This only affects the 'linux_x86' platform, since on the 'lx_hybrid_x86' platform the Genode GCC is the host GCC. Fixes #550.
105 lines
3.7 KiB
Makefile
105 lines
3.7 KiB
Makefile
#
|
|
# Make Linux headers of the host platform available to the program
|
|
#
|
|
include $(call select_from_repositories,lib/import/import-syscall.mk)
|
|
|
|
#
|
|
# Manually supply all library search paths of the host compiler to our tool
|
|
# chain.
|
|
#
|
|
HOST_LIB_SEARCH_DIRS = $(shell cc $(CC_MARCH) -print-search-dirs | grep libraries |\
|
|
sed "s/.*=//" | sed "s/:/ /g" |\
|
|
sed "s/\/ / /g" | sed "s/\/\$$//")
|
|
#
|
|
# Add search path for 'limits.h'
|
|
#
|
|
# We cannot simply extend 'INC_DIR' because this would give precedence to the
|
|
# host include search paths over Genode search path. The variable HOST_INC_DIR
|
|
# is appended to the include directory list.
|
|
#
|
|
HOST_INC_DIR += $(shell echo "int main() {return 0;}" |\
|
|
LANG=C $(CXX) -x c++ -v -E - 2>&1 |\
|
|
sed '/^\#include <\.\.\.> search starts here:/,/^End of search list/!d' |\
|
|
grep "include-fixed")
|
|
|
|
#
|
|
# Add search paths for normal libraries
|
|
#
|
|
CXX_LINK_OPT += $(addprefix -L,$(HOST_LIB_SEARCH_DIRS))
|
|
|
|
#
|
|
# Determine ldconfig executable
|
|
#
|
|
# On Ubuntu, /sbin/ is in the PATH variable. Hence we try using the program
|
|
# found via 'which'. If 'which' does not return anything (i.e., on Debian),
|
|
# try using the expected location '/sbin/'.
|
|
#
|
|
LDCONFIG := $(firstword $(wildcard $(shell which ldconfig) /sbin/ldconfig))
|
|
ifeq ($(LDCONFIG),)
|
|
$(error ldconfig is not found)
|
|
endif
|
|
|
|
#
|
|
# Add search paths for shared-library lookup
|
|
#
|
|
# We add all locations of shared libraries present in the ld.cache to our
|
|
# library search path.
|
|
#
|
|
HOST_SO_SEARCH_DIRS := $(sort $(dir $(shell $(LDCONFIG) -p | sed "s/^.* \//\//" | grep "^\/")))
|
|
LINK_ARG_PREFIX := -Wl,
|
|
CXX_LINK_OPT += $(addprefix $(LINK_ARG_PREFIX)-rpath-link $(LINK_ARG_PREFIX),$(HOST_SO_SEARCH_DIRS))
|
|
|
|
#
|
|
# The '__libc_csu_init' function is normally provided by the C library. We
|
|
# override the libc's version in our 'lx_hybrid' library to have a hook for
|
|
# Genode-specific initializations. Unfortunately, this way, we get two symbols
|
|
# with the same name. So we have to tell the linker to be forgiving. The order
|
|
# of the libraries at the linker command line determines which symbol is used.
|
|
# Therefore it is important to have 'lx_hybrid.lib.so' listed before '-lc',
|
|
# which is always the case when supplying '-lc' via 'EXT_OBJECTS' (not
|
|
# 'CXX_LINK_OPT').
|
|
#
|
|
CXX_LINK_OPT += -Wl,--allow-multiple-definition
|
|
|
|
#
|
|
# Make exceptions work
|
|
#
|
|
CXX_LINK_OPT += -Wl,--eh-frame-hdr
|
|
|
|
#
|
|
# Add all libraries and their dependencies specified at the 'LX_LIBS'
|
|
# variable to the linker command line
|
|
#
|
|
ifneq ($(LX_LIBS),)
|
|
EXT_OBJECTS = $(shell pkg-config --static --libs $(LX_LIBS))
|
|
endif
|
|
|
|
#
|
|
# Use the host's startup codes, linker script, and dynamic linker
|
|
#
|
|
ifneq ($(filter hardening_tool_chain, $(SPECS)),)
|
|
EXT_OBJECTS += $(shell cc $(CC_MARCH) -print-file-name=Scrt1.o)
|
|
EXT_OBJECTS += $(shell cc $(CC_MARCH) -print-file-name=crti.o)
|
|
EXT_OBJECTS += $(shell $(CUSTOM_CC) $(CC_MARCH) -print-file-name=crtbeginS.o)
|
|
EXT_OBJECTS += $(shell $(CUSTOM_CC) $(CC_MARCH) -print-file-name=crtendS.o)
|
|
else
|
|
EXT_OBJECTS += $(shell cc $(CC_MARCH) -print-file-name=crt1.o)
|
|
EXT_OBJECTS += $(shell cc $(CC_MARCH) -print-file-name=crti.o)
|
|
EXT_OBJECTS += $(shell $(CUSTOM_CC) $(CC_MARCH) -print-file-name=crtbegin.o)
|
|
EXT_OBJECTS += $(shell $(CUSTOM_CC) $(CC_MARCH) -print-file-name=crtend.o)
|
|
endif
|
|
EXT_OBJECTS += $(shell cc $(CC_MARCH) -print-file-name=crtn.o)
|
|
EXT_OBJECTS += -lgcc -lgcc_s -lsupc++ -lc
|
|
EXT_OBJECTS += -lpthread
|
|
|
|
USE_HOST_LD_SCRIPT = yes
|
|
|
|
ifeq (x86_64,$(findstring x86_64,$(SPECS)))
|
|
CXX_LINK_OPT += -Wl,--dynamic-linker=/lib64/ld-linux-x86-64.so.2
|
|
else
|
|
CXX_LINK_OPT += -Wl,--dynamic-linker=/lib/ld-linux.so.2
|
|
endif
|
|
|
|
# because we use the host compiler's libgcc, omit the Genode toolchain's version
|
|
LD_LIBGCC =
|