+extern void set_backtrace_file (boost::filesystem::path);
+extern std::map<std::string, std::string> split_get_request (std::string url);
+extern std::string video_asset_filename (boost::shared_ptr<dcp::PictureAsset> asset, int reel_index, int reel_count, boost::optional<std::string> content_summary);
+extern std::string audio_asset_filename (boost::shared_ptr<dcp::SoundAsset> asset, int reel_index, int reel_count, boost::optional<std::string> content_summary);
+extern std::string atmos_asset_filename (boost::shared_ptr<dcp::AtmosAsset> asset, int reel_index, int reel_count, boost::optional<std::string> content_summary);
+extern float relaxed_string_to_float (std::string);
+extern std::string careful_string_filter (std::string);
+extern std::pair<int, int> audio_channel_types (std::list<int> mapped, int channels);
+extern boost::shared_ptr<AudioBuffers> remap (boost::shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map);
+extern Eyes increment_eyes (Eyes e);
+extern void checked_fread (void* ptr, size_t size, FILE* stream, boost::filesystem::path path);
+extern void checked_fwrite (void const * ptr, size_t size, FILE* stream, boost::filesystem::path path);
+extern size_t utf8_strlen (std::string s);
+extern std::string day_of_week_to_string (boost::gregorian::greg_weekday d);
+extern void emit_subtitle_image (dcpomatic::ContentTimePeriod period, dcp::SubtitleImage sub, dcp::Size size, boost::shared_ptr<TextDecoder> decoder);
+extern bool show_jobs_on_console (bool progress);
+extern void copy_in_bits (boost::filesystem::path from, boost::filesystem::path to, boost::function<void (float)>);
+#ifdef DCPOMATIC_VARIANT_SWAROOP
+extern boost::shared_ptr<dcp::CertificateChain> read_swaroop_chain (boost::filesystem::path path);
+extern void write_swaroop_chain (boost::shared_ptr<const dcp::CertificateChain> chain, boost::filesystem::path output);
+#endif
+extern dcp::Size scale_for_display (dcp::Size s, dcp::Size display_container, dcp::Size film_container);
+extern dcp::DecryptedKDM decrypt_kdm_with_helpful_error (dcp::EncryptedKDM kdm);
+extern boost::filesystem::path default_font_file ();