On 19 February 2014 22:14, Thomas <nkt747@xxxxxxxxx> wrote: > Hi, > > I am building gcc 4.8.1 in a Red Hat 6.4 64 bit machine. I am building gnat > first and it is build as 32 bit i686 architecture. I used > gnat-gpl-2013-i686-pc-linux-gnu-bin for gnat and it created a 32 bit gcc in > the directory, I set the path to that so, gcc is now gcc 4.7.4 from > /gnat/bin/gcc. When I checked that is 32 bit gcc. > > I used this configuration > > ./gcc-4.8.1/configure --disable-multilib --disable-bootstrap > --disable-install-libiberty --with-system-zlib --enable-clocale=gnu > --enable-shared --enable-lto --enable-threads=posix --enable-__cxa_atexit > --enable-languages=c,c++,fortran,java,ada --prefix=/usr/local/ CFLAGS="-pipe > -march=native -mtune=native -g -O2" CXXFLAGS="-pipe -march=native > -mtune=native -g -O2" > > > I was able to build the compiler with this configuration and arch is x86_64. > > when I tried to compile a file with -m32 option it didn't work and got the > error message crtbegin.o: could not read symbols: File in wrong format. > Collect2: kd returned 1 exit status > On x86_64, the --disable-multilib option means build a compiler without 32-bit support.
