I had fixed a linking problem today. The problem was caused by multiple definitions of the same function name. The linker complains about the multiple definitions of the same function. The solution is to add "-z muldefs" to the LDFLAGS, so that the linker will accept multiple definitions and just link the function it encountered first into the final ELF file. This maybe dangerous, as your final image may be different if the linking order of the object files changed. So, be careful when you use this option. We used this option as we have defined some of our own stdio functions with the same name as the standard stdio functions. During the linking stage, they will give the multiple definition errors. We just need to place our own implementation of the stdio functions in front of the newlib stdio library.
A better solution was to rename our functions to different function names other than the stdio function names. In this case, it won't cause further confusion.
I finally found that I had fixed this problem with bcmring platform a year ago and I have to fix it for the bcmhana platform again. The engineer who ported the makefile to bcmhana didn't pay enough attention to this option.
