return  [
            new SourceFile("c", "hello.c", """
            #include <stdio.h>
            #include "hello.h"

            void DLL_FUNC sayHello() {
                #ifdef FRENCH
                printf("${HELLO_WORLD_FRENCH}\\n");
                #else
                printf("${HELLO_WORLD}\\n");
                #endif

                fflush(stdout);
            }

	Persian              Tag = Tag{language: faIndex, locale: faIndex}
	Finnish              Tag = Tag{language: fiIndex, locale: fiIndex}
	Filipino             Tag = Tag{language: filIndex, locale: filIndex}
	French               Tag = Tag{language: frIndex, locale: frIndex}
	CanadianFrench       Tag = Tag{language: frCAIndex, locale: frCAIndex}
	Gujarati             Tag = Tag{language: guIndex, locale: guIndex}

// in Accept-Language (with reasonable frequency).
var acceptFallback = map[string]language.Language{
	"english": _en,
	"deutsch": _de,
	"italian": _it,
	"french":  _fr,
	"*":       _mul, // defined in the spec to match all languages.
}

type tagSort struct {
	tag []Tag
	q   []float32
}

func (s *tagSort) Len() int {
	return len(s.q)
}