redef fun finalize_ffi(compiler)
	do
		if not uses_ffi then return

		var v = compiler.new_visitor
		var n = nmodule(v)
		if n == null then return
		n.ensure_compile_ffi_wrapper
		finalize_ffi_wrapper(v.compiler.toolchain.compile_dir, v.compiler.mainmodule)
		for file in ffi_files do v.compiler.extern_bodies.add(file)

		ensure_compile_nitni_base(v)

		nitni_ccu.header_c_types.add("#include \"{c_name}._ffi.h\"\n")
		nitni_ccu.header_c_types.add("#include <stdint.h>\n")
		nitni_ccu.header_c_types.add """
extern void nitni_global_ref_incr(void*);
extern void nitni_global_ref_decr(void*);
"""

		var cflags = self.cflags[""].join(" ")
		nitni_ccu.write_as_nitni(self, v.compiler.toolchain.compile_dir)

		for file in nitni_ccu.files do
			var f = new ExternCFile(file.basename, cflags)
			f.pkgconfigs.add_all pkgconfigs
			v.compiler.extern_bodies.add(f)
		end

		# reset FFI things so the next compilation job, if any, starts with a clean context
		# FIXME clean and rationalize this
		nitni_ccu = null
		compiled_ffi_methods.clear
		ffi_ccu = null
		ffi_files.clear
	end

	redef fun finalize_ffi(compiler: AbstractCompiler)
	do
		if not uses_ffi then return

		super

		compiled_callbacks.clear
		#Do not reset `foreign_callbacks` and `ffi_callbacks` because they are computed in previous phases
	end