Hi there,
Recently I came across U-boot-1.1.4 for an ARM board, and found the link
part in top make file.
u-boot: depend $(SUBDIRS) $(OBJS) $(LIBS) $(LDSCRIPT)
UNDEF_SYM=`$(OBJDUMP) -x $(LIBS) |sed -n -e
's/.*\(__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`;\
$(LD) $(LDFLAGS) $$UNDEF_SYM $(OBJS) \
--start-group $(LIBS)
--end-group $(PLATFORM_LIBS) \
-Map u-boot.map -o u-boot
I am wondering the "UNDEF_SYM" is not necessary for ld to make the final
object: u-boot. If I take ""UNDEF_SYM" out, I can still link without any
warning or error.
Thanks
Tim Liu
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