build flags/options

[mike]

Sorry for the newbie question ...

I need the build process to look for libelf in /usr/lib but gmp, ppl, 
cloog, etc. in /usr/local/lib.  I've tried lots of combinations of the 
flags/options listed by 'configure --help' including this:

> ~/GCC/gcc-4.5.0/configure --program-suffix=-4.5.0 
> --with-libelf-include=/usr/include --with-libelf-lib=/usr/lib 
> --with-mpc=/usr/local/lib --with-mpfr=/usr/local/lib 
> --with-gmp=/usr/local/lib --with-ppl=/usr/local/lib 
> --with-cloog=/usr/local/lib

but what always happens is that when it goes into 
i686-pc-linux-gnu/libgcc in the object directory I get this:

> configure:3233: /home/mike/GCC-obj-dir/./gcc/xgcc 
> -B/home/mike/GCC-obj-dir/./gcc/ -B/usr/local/i686-pc-linux-gnu/bin/ 
> -B/usr/local/i686-pc-linux-gnu/lib/ -isystem 
> /usr/local/i686-pc-linux-gnu/include -isystem 
> /usr/local/i686-pc-linux-gnu/sys-include    -c -g -O2  conftest.c >&5
> /home/mike/GCC-obj-dir/./gcc/cc1: error while loading shared 
> libraries: libmpc.so.2: cannot open shared object file: No such file 
> or directory
> configure:3237: $? = 1
> configure: failed program was:

and there is this in config.log in the object libgcc directory:

> configure:3020: /home/mike/GCC-obj-dir/./gcc/xgcc 
> -B/home/mike/GCC-obj-dir/./gcc/ -B/usr/local/i686-pc-linux-gnu/bin/ 
> -B/usr/local/i686-pc-linux-gnu/lib/ -isystem 
> /usr/local/i686-pc-linux-gnu/include -isystem 
> /usr/local/i686-pc-linux-gnu/sys-include    -o conftest -g -O2   
> conftest.c >&5
> /home/mike/GCC-obj-dir/./gcc/cc1: error while loading shared 
> libraries: libmpc.so.2: cannot open shared object file: No such file 
> or directory
> configure:3023: $? = 1

Depending on what flags/options I use with 'configure' it might not find 
libelf.so.0 instead.

Thanks,
Mike