# Ensures all of the general foreign code of the module has been analyzed.
	# Manages header blocks, extern class types and foreign dependancies between modules
	fun ensure_compile_ffi_wrapper
	do
		var mmodule = mmodule
		if mmodule == null or mmodule.ffi_ccu != null then return

		# ready extern code compiler
		var ffi_ccu = new CCompilationUnit
		mmodule.ffi_ccu = ffi_ccu

		# generate code
		for block in n_extern_code_blocks do
			var language = block.language
			assert language != null
			mmodule.present_languages.add(language)
			language.compile_module_block(block, ffi_ccu, mmodule)
		end

		ffi_ccu.header_c_base.add( "#include \"{mmodule.c_name}._nitni.h\"\n" )

		ffi_ccu.body_decl.add("#ifdef ANDROID\n")
		ffi_ccu.body_decl.add("	#include <android/log.h>\n")
		ffi_ccu.body_decl.add("	#define PRINT_ERROR(...) (void)__android_log_print(ANDROID_LOG_WARN, \"Nit\", __VA_ARGS__)\n")
		ffi_ccu.body_decl.add("#else\n")
		ffi_ccu.body_decl.add("	#define PRINT_ERROR(...) fprintf(stderr, __VA_ARGS__)\n")
		ffi_ccu.body_decl.add("#endif\n")

		for nclassdef in n_classdefs do
			# Does it declares an extern type?
			if nclassdef isa AStdClassdef and nclassdef.n_extern_code_block != null then
				mmodule.uses_ffi = true
				var language = nclassdef.n_extern_code_block.language
				assert language != null
				mmodule.present_languages.add(language)
				nclassdef.n_extern_code_block.language.compile_extern_class(
					nclassdef.n_extern_code_block.as(not null), nclassdef, ffi_ccu, mmodule)
			end
		end
	end