Hello, gcc 4.8.2 I just happen to be in need to use pgo,lto with shared libraries that I want to link. I cannot figure out if lto will bring some efficiency to the links. 1) gcc -march=native -03 -shared -fPIC first_shared.c -flto -o libfoo.so 2) gcc -march=native -03 -shared -fPIC second_shared.c -flto -o libbar.so 3) gcc -march=native -03 main.c -lfoo -lbar -flto Ok all my functions are static except some of them (public interface) inside the shared library. What should I do exactly to take advantage of lto with shared libraries ? Now, what does it take to create PGO on shared libraries ? I know I can use fprofile-generate/fprofile-use on 3) but will it be enough to take 1) and 2) into account ? I am a bit lost on what to do here in this context. All the commands work fine but is it doing anything ? Thanks Alain
