Eric Lemings wrote: > I was just trying to build the 4.3.1 release on RH5. During the > configuration of libgcc, I get an error shown in the config.log file > below. This looks like an error in the distributed config files. Or am > I doing something wrong? I had no such problem IIRC building the 4.3.0 > release. > > ... > /build/lemings/gcc-4.3.1/./gcc/cc1: error while loading shared > libraries: libmpfr.so.1: ca > nnot open shared object file: No such file or directory Where did you install mpfr? If it's not in one of the default locations like /usr/lib then it's your responsibility to tell the dynamic linker where to find the .so file at runtime. You can do this by adding its location to LD_LIBRARY_PATH or /etc/ld.so.conf. This is not gcc's responsibility, it's a generic requirement whenever you install a shared library of any kind. Brian