On 10-6-9 下午3:08, Ian Lance Taylor wrote: > Da Zheng <zhengda1936@xxxxxxxxx> writes: > >> gc-selections in ld can enable garbage collection of unused input sections. I >> hope some functions can be preserved even though they are not called by other >> parts of the code. I don't want to change the code. Could I somehow specify in >> the command line so that some specific functions are excluded from ld's garbage >> collection? > > The easiest way is to find some set of symbols in the sections you can > to keep and add a -u option to the linker for each such symbol. When > linking using the compiler, as you should, write -Wl,-u,SYMBOL. > > Another way is to use a linker script and use KEEP with the sections > you want to keep. I don't recommend this approach unless you can't > use the first one for some reason. See the linker manual. Thanks. The -u option works for me pretty well. Zheng Da
