[boost] [gil::io] clang compiler error

Hi all, I'm trying to fix some compiler errors with clang and the new gil::io. The following trivial code just wont compile: extern "C" { #include #include } int main() { jpeg_create_compress(NULL); return 0; } The error is: undefined reference to `jpeg_CreateCompress' I guess it's a very simple solution but I'm not much experienced with clang and gcc. Thanks, Christian