On Fri, 16 Apr 2010, Uri Moszkowicz wrote:
What I don't understand is that libmpc.so.2 is in the provided --with-mpc path yet configure isn't passing it in to the test program. The build passes by the way if I add the lib directories of all those --with arguments to LD_LIBRARY_PATH but then produced executables require the LD_LIBRARY_PATH to continue to be set.
Runtime path is something gcc doesn't seem to know anything about. When you install gcc in a non-standard location, it won't tell the programs it builds where they can find libgcc_s.so.1. Even bootstrapping itself, it won't tell its next iteration where to find libmpc.so.2. The easiest solution is to use static versions of gmp/mpfr/mpc so there is no library to search for at runtime (this is what happens when you let the gcc build process compile gmp/mpfr/mpc for you). Otherwise, you can use LD_LIBRARY_PATH, or put the libraries in /usr/local/lib (assuming it is searched by default) or setup ld.so.conf so it looks in the right places, or use LDFLAGS (BOOT_LDFLAGS?) to pass a -rpath option to the linker.
