Add support for mklibs (strips unused syms from shared libs such as uClibc)

source "toolchain/ccache/Config.in"

source "toolchain/gdb/Config.in"

source "toolchain/elf2flt/Config.in"

source "toolchain/mklibs/Config.in"

comment "Common Toolchain Options"

config BR2_MKLIBS

	bool "Run mklibs on the built root filesystem"

	default n

	help

	  Recompiles all the shared libraries to only include the

	  symbols actually needed to run the binaries on the target

######################################################################

#

# mklibs

#

######################################################################

MKLIBS_PROGRAM:=$(STAGING_DIR)/bin/mklibs.py

$(MKLIBS_PROGRAM): toolchain/mklibs/mklibs.py

	cp -a toolchain/mklibs/mklibs.py $@

mklibs-clean:

	rm -f $(MKLIBS_PROGRAM)

mklibs-dirclean:

	true

#############################################################

#

# Run mklibs

#

#############################################################

MKLIBS_PYTHON:=$(shell which python)

ifeq ($(MKLIBS_PYTHON),)

    MKLIBS_PYTHON=/usr/bin/python

endif

$(STAGING_DIR)/mklibs-stamp: $(MKLIBS_PROGRAM) $(MKLIBS_PYTHON) $(STAGING_DIR)/lib/*

	find $(TARGET_DIR) -type f -perm +100 -exec \

	    file -r -N -F '' {} + | \

	    awk ' /executable.*dynamically/ { print $$1 }' > $(STAGING_DIR)/mklibs-progs

	cd $(TARGET_DIR); PATH=$(PATH):$(STAGING_DIR)/bin $(MKLIBS_PYTHON) $(MKLIBS_PROGRAM) \

	    --target $(REAL_GNU_TARGET_NAME) --root $(STAGING_DIR) -d ./ \

	    `cat $(STAGING_DIR)/mklibs-progs`

	touch $@

# this empty target allows a mklibs dependeny to be included in the

# target targets, but it will be only invoked if BR2_MKLIBS is conf'ed

.PHONY: mklibs

mklibs:

#############################################################

#

# Toplevel Makefile options

#

#############################################################

ifeq ($(strip $(BR2_MKLIBS)),y)

mklibs: $(STAGING_DIR)/mklibs-stamp

endif