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

based on a patch from akvadrako, and using a version of mklibs.py that was
massively hacked up by andersee and mjn3 for uClibc support.

1 files changed, 49 insertions, 0 deletions

diff --git a/toolchain/mklibs/mklibs.mk b/toolchain/mklibs/mklibs.mk
new file mode 100644
index 000000000..b7010176a
--- /dev/null
+++ b/toolchain/mklibs/mklibs.mk
@@ -0,0 +1,49 @@
+######################################################################
+#
+# 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