Dependencies to be checked by %configure% are declared within the %<deps>% section. The %<deps>% tag itself has two attributes: %lang% for the programming language you want to have code generated for and %platform% for the operating systems to be supported. Set %lang% to %"c"% for plain C code or %"c++"% for C++ code generation. By default C code is generated. C++ code generation should be selected for extensions making use of C++ libraries. Possible values for %platform% are %unix% for all Unix-like platforms supporting %configure% scripts, %win32% for Microsoft Windows with Microsoft VisualStudio as developement platform or %all% for both supported platforms. Within the %<deps>% section it is possible to define %configure% parameters, to specify needed header files and libraries and to add existing files to the extension.