9 files changed, 18 insertions, 18 deletions
diff --git a/src/decoder/plugins/FlacDecoderPlugin.cxx b/src/decoder/plugins/FlacDecoderPlugin.cxx
index ca36180ad..e1c06c5a6 100644
--- a/src/decoder/plugins/FlacDecoderPlugin.cxx
+++ b/src/decoder/plugins/FlacDecoderPlugin.cxx
@@ -53,7 +53,7 @@ static void flacPrintErroredState(FLAC__StreamDecoderState state)
 	LogError(flac_domain, FLAC__StreamDecoderStateString[state]);
 }
 
-static void flacMetadata(gcc_unused const FLAC__StreamDecoder * dec,
+static void flacMetadata([[maybe_unused]] const FLAC__StreamDecoder * dec,
 			 const FLAC__StreamMetadata * block, void *vdata)
 {
 	auto &fd = *(FlacDecoder *)vdata;
@@ -307,7 +307,7 @@ flac_decode(DecoderClient &client, InputStream &input_stream)
 }
 
 static bool
-oggflac_init(gcc_unused const ConfigBlock &block)
+oggflac_init([[maybe_unused]] const ConfigBlock &block)
 {
 	return !!FLAC_API_SUPPORTS_OGG_FLAC;
 }
diff --git a/src/decoder/plugins/FlacInput.cxx b/src/decoder/plugins/FlacInput.cxx
index 94bbf9ca1..8cbab30e8 100644
--- a/src/decoder/plugins/FlacInput.cxx
+++ b/src/decoder/plugins/FlacInput.cxx
@@ -98,7 +98,7 @@ FlacInput::Error(FLAC__StreamDecoderErrorStatus status)
 }
 
 FLAC__StreamDecoderReadStatus
-FlacInput::Read(gcc_unused const FLAC__StreamDecoder *flac_decoder,
+FlacInput::Read([[maybe_unused]] const FLAC__StreamDecoder *flac_decoder,
 		FLAC__byte buffer[], size_t *bytes,
 		void *client_data)
 {
@@ -108,7 +108,7 @@ FlacInput::Read(gcc_unused const FLAC__StreamDecoder *flac_decoder,
 }
 
 FLAC__StreamDecoderSeekStatus
-FlacInput::Seek(gcc_unused const FLAC__StreamDecoder *flac_decoder,
+FlacInput::Seek([[maybe_unused]] const FLAC__StreamDecoder *flac_decoder,
 		FLAC__uint64 absolute_byte_offset, void *client_data)
 {
 	auto *i = (FlacInput *)client_data;
@@ -117,7 +117,7 @@ FlacInput::Seek(gcc_unused const FLAC__StreamDecoder *flac_decoder,
 }
 
 FLAC__StreamDecoderTellStatus
-FlacInput::Tell(gcc_unused const FLAC__StreamDecoder *flac_decoder,
+FlacInput::Tell([[maybe_unused]] const FLAC__StreamDecoder *flac_decoder,
 		FLAC__uint64 *absolute_byte_offset, void *client_data)
 {
 	auto *i = (FlacInput *)client_data;
@@ -126,7 +126,7 @@ FlacInput::Tell(gcc_unused const FLAC__StreamDecoder *flac_decoder,
 }
 
 FLAC__StreamDecoderLengthStatus
-FlacInput::Length(gcc_unused const FLAC__StreamDecoder *flac_decoder,
+FlacInput::Length([[maybe_unused]] const FLAC__StreamDecoder *flac_decoder,
 		  FLAC__uint64 *stream_length, void *client_data)
 {
 	auto *i = (FlacInput *)client_data;
@@ -135,7 +135,7 @@ FlacInput::Length(gcc_unused const FLAC__StreamDecoder *flac_decoder,
 }
 
 FLAC__bool
-FlacInput::Eof(gcc_unused const FLAC__StreamDecoder *flac_decoder,
+FlacInput::Eof([[maybe_unused]] const FLAC__StreamDecoder *flac_decoder,
 	       void *client_data)
 {
 	auto *i = (FlacInput *)client_data;
@@ -144,7 +144,7 @@ FlacInput::Eof(gcc_unused const FLAC__StreamDecoder *flac_decoder,
 }
 
 void
-FlacInput::Error(gcc_unused const FLAC__StreamDecoder *decoder,
+FlacInput::Error([[maybe_unused]] const FLAC__StreamDecoder *decoder,
 		 FLAC__StreamDecoderErrorStatus status, void *client_data)
 {
 	auto *i = (FlacInput *)client_data;
diff --git a/src/decoder/plugins/FluidsynthDecoderPlugin.cxx b/src/decoder/plugins/FluidsynthDecoderPlugin.cxx
index 722aa44d0..9aa8e2d0d 100644
--- a/src/decoder/plugins/FluidsynthDecoderPlugin.cxx
+++ b/src/decoder/plugins/FluidsynthDecoderPlugin.cxx
@@ -196,7 +196,7 @@ fluidsynth_file_decode(DecoderClient &client, Path path_fs)
 
 static bool
 fluidsynth_scan_file(Path path_fs,
-		     gcc_unused TagHandler &handler) noexcept
+		     [[maybe_unused]] TagHandler &handler) noexcept
 {
 	return fluid_is_midifile(path_fs.c_str());
 }
diff --git a/src/decoder/plugins/GmeDecoderPlugin.cxx b/src/decoder/plugins/GmeDecoderPlugin.cxx
index 3ee92f877..84365fae2 100644
--- a/src/decoder/plugins/GmeDecoderPlugin.cxx
+++ b/src/decoder/plugins/GmeDecoderPlugin.cxx
@@ -62,7 +62,7 @@ static int gme_accuracy;
 #endif
 
 static bool
-gme_plugin_init(gcc_unused const ConfigBlock &block)
+gme_plugin_init([[maybe_unused]] const ConfigBlock &block)
 {
 #if GME_VERSION >= 0x000600
 	auto accuracy = block.GetBlockParam("accuracy");
diff --git a/src/decoder/plugins/Mpg123DecoderPlugin.cxx b/src/decoder/plugins/Mpg123DecoderPlugin.cxx
index 6e85e111b..984f74928 100644
--- a/src/decoder/plugins/Mpg123DecoderPlugin.cxx
+++ b/src/decoder/plugins/Mpg123DecoderPlugin.cxx
@@ -37,7 +37,7 @@
 static constexpr Domain mpg123_domain("mpg123");
 
 static bool
-mpd_mpg123_init(gcc_unused const ConfigBlock &block)
+mpd_mpg123_init([[maybe_unused]] const ConfigBlock &block)
 {
 	mpg123_init();
 
diff --git a/src/decoder/plugins/OpusDecoderPlugin.cxx b/src/decoder/plugins/OpusDecoderPlugin.cxx
index 37fc86b3f..1dc2d6441 100644
--- a/src/decoder/plugins/OpusDecoderPlugin.cxx
+++ b/src/decoder/plugins/OpusDecoderPlugin.cxx
@@ -64,7 +64,7 @@ IsOpusTags(const ogg_packet &packet) noexcept
 }
 
 bool
-mpd_opus_init(gcc_unused const ConfigBlock &block)
+mpd_opus_init([[maybe_unused]] const ConfigBlock &block)
 {
 	LogDebug(opus_domain, opus_get_version_string());
 
diff --git a/src/decoder/plugins/SndfileDecoderPlugin.cxx b/src/decoder/plugins/SndfileDecoderPlugin.cxx
index 91baf1275..6aec0825f 100644
--- a/src/decoder/plugins/SndfileDecoderPlugin.cxx
+++ b/src/decoder/plugins/SndfileDecoderPlugin.cxx
@@ -34,7 +34,7 @@
 static constexpr Domain sndfile_domain("sndfile");
 
 static bool
-sndfile_init(gcc_unused const ConfigBlock &block)
+sndfile_init([[maybe_unused]] const ConfigBlock &block)
 {
        LogDebug(sndfile_domain, sf_version_string());
        return true;
@@ -109,9 +109,9 @@ sndfile_vio_read(void *ptr, sf_count_t count, void *user_data)
 }
 
 static sf_count_t
-sndfile_vio_write(gcc_unused const void *ptr,
-		  gcc_unused sf_count_t count,
-		  gcc_unused void *user_data)
+sndfile_vio_write([[maybe_unused]] const void *ptr,
+		  [[maybe_unused]] sf_count_t count,
+		  [[maybe_unused]] void *user_data)
 {
 	/* no writing! */
 	return -1;
diff --git a/src/decoder/plugins/VorbisDecoderPlugin.cxx b/src/decoder/plugins/VorbisDecoderPlugin.cxx
index eadd76573..b71fdd4d8 100644
--- a/src/decoder/plugins/VorbisDecoderPlugin.cxx
+++ b/src/decoder/plugins/VorbisDecoderPlugin.cxx
@@ -311,7 +311,7 @@ VorbisDecoder::OnOggEnd()
 /* public */
 
 static bool
-vorbis_init(gcc_unused const ConfigBlock &block)
+vorbis_init([[maybe_unused]] const ConfigBlock &block)
 {
 #ifndef HAVE_TREMOR
 	LogDebug(vorbis_domain, vorbis_version_string());
diff --git a/src/decoder/plugins/WavpackDecoderPlugin.cxx b/src/decoder/plugins/WavpackDecoderPlugin.cxx
index 93459f311..4bb629d25 100644
--- a/src/decoder/plugins/WavpackDecoderPlugin.cxx
+++ b/src/decoder/plugins/WavpackDecoderPlugin.cxx
@@ -143,7 +143,7 @@ format_samples_int(void *buffer, uint32_t count)
  * No conversion necessary.
  */
 static void
-format_samples_nop(gcc_unused void *buffer, gcc_unused uint32_t count)
+format_samples_nop([[maybe_unused]] void *buffer, [[maybe_unused]] uint32_t count)
 {
 	/* do nothing */
 }