Problems building gcc

[Douglas Houston <dhouston@staffmail.ed.ac.uk>]

Hi all,

I'm having some trouble installing the latest gcc (which I need to  
build another program called Gromacs).

I am on Scientific Linux release 6.8 (Carbon) (kernel  
2.6.32-573.3.1.el6.x86_64), trying to install gcc-5.4.0.

After installing the latest gmp, mpfr and mpc, I create a separate  
objdir build/install directory as recommended. In there, as root, I run:


../gcc-5.4.0/configure


Which fails with:


/usr/bin/ld: crt1.o: No such file: No such file or directory
collect2: ld returned 1 exit status
configure: error: I suspect your system does not have 32-bit  
developement librar
ies (libc and headers). If you have them, rerun configure with  
--enable-multilib
. If you do not have them, and want to build a 64-bit-only compiler,  
rerun confi
gure with --disable-multilib.


So as directed by the output, I try:


../gcc-5.4.0/configure  --disable-multilib


Now it fails with:


checking for x86_64-unknown-linux-gnu-gcc...  
/root/gcc-5.4.0-install/./gcc/xgcc
-B/root/gcc-5.4.0-install/./gcc/  
-B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/u
sr/local/x86_64-unknown-linux-gnu/lib/ -isystem  
/usr/local/x86_64-unknown-linux-
gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include
checking for suffix of object files... configure: error: in  
`/root/gcc-5.4.0-ins
tall/x86_64-unknown-linux-gnu/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.


Can anyone suggest what the fix might be? I've looked in config.log as  
the output suggests but can't find any reference to  
x86_64-unknown-linux-gnu-gcc.

cheers,
Doug






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