Question

I’m trying to build GCC 4.6 under CentOS release 5.5 (Final). I’ve freshly built GMP-5.0.1, MPC-0.9, and MPFR-3.0.1, and have used the following configure command:

../configure –prefix=/users/xxxx/apps/mygcc4.6 –disable-checking –enable-threads=posix –enable-languages=c,c++,fortran –with-mpfr=/users/xxxx/code/gcc/mpfr-3.0.1-install-cyprus –with-gmp=/users/xxxx/code/gcc/gmp-5.0.1-install-cyprus –with-mpc=/users/xxxx/code/gcc/mpc-0.9-install-cyprus

After this, I run make and after about 5 minutes get the following error message:

checking for suffix of object files… configure: error: in /users/xxxx/code/gcc/gcc-4.6.0/obj/x86_64-unknown-linux-gnu/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
Seeconfig.log’ for more details.

The config.log indicates that a recently generated program (cc1) is involved:

/users/xxxx/code/gcc/gcc-4.6.0/obj/./gcc/cc1

Indeed if I run this program with no arguments I get the same error message found in config.log:

error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory

However, libmpfr.so.4 is in the lib subdirectory of that provided to configure using the –with-mpfr flag, as seen above. I have LD_LIBRARY_PATH and LIBRARY_PATH empty. Any idea how I can get past this error?

Answer 1

Make sure your library is acutally in the directory given and not in some lib subdirectory. Use export LD_LIBRARY_PATH=/users/xxxx/code/gcc/mpfr-3.0.1-install-cyprus as you have already suggested 😉