Downloading GCCGCC is distributed via SVN and FTP tarballs compressed with gzip or bzip2. It is possible to download a full distribution or specific components.
Please refer to the releases web page for information on how to obtain GCC.
The full distribution includes the C, C++, Objective-C, Fortran, Java, and Ada (in the case of GCC 3.1 and later) compilers. The full distribution also includes runtime libraries for C++, Objective-C, Fortran, and Java. In GCC 3.0 and later versions, the GNU compiler testsuites are also included in the full distribution.
If you choose to download specific components, you must download the core GCC distribution plus any language specific distributions you wish to use. The core distribution includes the C language front end as well as the shared components. Each language has a tarball which includes the language front end as well as the language runtime (when appropriate).
Unpack the core distribution as well as any language specific distributions in the same directory.
If you also intend to build binutils (either to upgrade an existing installation or for use in place of the corresponding tools of your OS), unpack the binutils distribution either in the same directory or a separate one. In the latter case, add symbolic links to any components of the binutils you intend to build alongside the compiler (bfd, binutils, gas, gprof, ld, opcodes, ...) to the directory containing the GCC sources.
Likewise, the GMP and MPFR libraries can be automatically built together with GCC. Unpack the GMP and/or MPFR source distributions in the directory containing the GCC sources and rename their directories to gmp and mpfr, respectively (or use symbolic links with the same name).