Cross-compiling Tcl r3 (See the current copy)
To Windows (x86)
$ RC=i586-mingw32msvc-windres AR=i586-mingw32msvc-ar RANLIB=i586-mingw32msvc-ranlib \ ./configure --host=i586-mingw32msvc --build=i486-slackware-linux --disable-shared \ --disable-threads --disable-64bit --disable-symbols
To MIPS (uClibc)
$ AR=mipsel-linux-uclibc-ar RANLIB=mipsel-linux-uclibc-ranlib ./configure \ --host=mipsel-linux-uclibc --build=i486-slackware-linux --disable-shared \ --disable-threads --disable-64-bit --disable-symbols