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. Ian
