config.guess says sparc-sun-solaris2.8 but I forced it to build sparcv9-sun-solaris2 because I wanted a 64 bit compiler. $ gcc -v Reading specs from /opt/local/lib/gcc-lib/sparcv9-sun-solaris2/3.0.4/specs Configured with: ../gcc-3.0.4/configure --prefix=/opt/local sparcv9-sun-solaris2 Thread model: posix gcc version 3.0.4