build system: produce link map. Rather useful when you
are wondering why your busybox is much bigger that you hoped for.
diff --git a/Makefile b/Makefile
index ddc8b25..71ebf8f 100644
--- a/Makefile
+++ b/Makefile
@@ -563,7 +563,7 @@
# May be overridden by arch/$(ARCH)/Makefile
quiet_cmd_busybox__ ?= LINK $@
cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \
- -o $@ \
+ -o $@ -Wl,-M \
-Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
-Wl,--start-group $(busybox-all) -Wl,--end-group