Example:

1. Compiling a Tcl extension using a KitDLL SDK
   1. Build or Download a KitDLL SDK
   2. $ tar -xf /path/to/libtclkit-sdk-8.4.19.tar.gz
   3. $ TCLKIT_SDK_DIR="$(pwd)/libtclkit-sdk-8.4.19"
   4. $ export TCLKIT_SDK_DIR
   5. $ ./configure --with-tcl="${TCLKIT_SDK_DIR}/lib"
   6. $ make
2. Compiling TkPNG for Windows/i586 on Linux using a KitDLL SDK
   1. $ CC=i586-mingw32msvc-gcc; CXX=i586-mingw32msvc-g++; LD=i586-mingw32msvc-ld; AR=i586-mingw32msvc-ar; RANLIB=i586-mingw32msvc-ranlib; STRIP=i586-mingw32msvc-strip; export CC CXX LD AR RANLIB STRIP
   2. $ wget http://www.rkeene.org/devel/kitcreator/kitbuild/nightly/libtclkit-8.4.19-win32-i586-kitdll-xcompile-sdk.tar.gz http://zlib.net/zlib-1.2.5.tar.gz http://sourceforge.net/projects/tkpng/files/tkpng/0.9/tkpng0.9.tgz/download
   3. $ tar -xf libtclkit-8.4.19-win32-i586-kitdll-xcompile-sdk.tar.gz
   4. $ TCLKIT_SDK_DIR="$(pwd)/libtclkit-sdk-8.4.19"; export TCLKIT_SDK_DIR
   5. $ tar -xf zlib-1.2.5.tar.gz
   6. $ cd zlib-1.2.5/
   7. $ ./configure --static --prefix="${TCLKIT_SDK_DIR}" && make && make install
   8. $ cd ../
   9. $ tar -xf tkpng0.9.tgz
   10. $ cd tkpng0.9
   11. $ ./configure --host=i586-mingw32msvc --with-tcl="${TCLKIT_SDK_DIR}/lib" --with-tk="${TCLKIT_SDK_DIR}/lib" && make && make install
   12. $ cd "${TCLKIT_SDK_DIR}/lib/tkpng0.9"
   13. $ mv libtkpng0.9.so tkpng09.dll
   14. $ vi pkgIndex.tcl