This is the GCC used for compiling illumos.

Theil-* branches contain the the patches used for building illumos, whichare rebased versions of those used for Solaris/OpenSolaris, and thenadditional changes. The versions actually in use are tagged withil-VERSION-ilN whereN version the illumos changes over the GCC version inquestion.

Thewip/* branches are works in progress andshould never be used

Thecodesourcery/* andsun/* branches contain the original GCCs as patched byCodeSourcery and Sun Microsystems for use compiling Solaris and OpenSolaris aswas, and the GCCFSS patches of Sun's

When building the compilers for illumos use the flags generally used are:

i386

../../configure --prefix=/opt/gcc/$VER --with-as=/usr/sfw/bin/gas --with-gnu-as \   --with-ld=/usr/bin/ld --without-gnu-ld --enable-languages="c,c++,objc" \   --enable-shared  --with-mpfr-include=/usr/include/mpfr \   --with-gmp-include=/usr/include/gmp \   --with-pkgversion="Illumos$(git describe --all)" \   --with-bugurl="http://github.com/richlowe/gcc/issues"

sparc

../../configure --prefix=/opt/gcc/$VER --without-gnu-as --with-as=/usr/ccs/bin/as"\   --with-ld=/usr/bin/ld --without-gnu-ld --enable-languages="c,c++,objc"\   --enable-shared  --with-mpfr-include=/usr/include/mpfr\   --with-gmp-include=/usr/include/gmp\   --with-pkgversion="Illumos$(git describe --all)"\   --with-bugurl="http://github.com/richlowe/gcc/issues"

Please use the correct--with-bugurl and--with-pkgversion flags asappropriate for any modifications you make, but please also be sure that theyaccurately describe what is in use (ie, are not left at the defaults) either.