use [[gnu::...]] attributes

src/playlist/PlaylistPlugin.hxx

@@ -6,7 +6,6 @@
 
 #include "input/Ptr.hxx"
 #include "thread/Mutex.hxx"
-#include "util/Compiler.h"
 
 #include <string_view>
 
@@ -104,19 +103,19 @@ struct PlaylistPlugin {
 	/**
 	 * Does the plugin announce the specified URI scheme?
 	 */
-	gcc_pure gcc_nonnull_all
+	[[gnu::pure]]
 	bool SupportsScheme(std::string_view scheme) const noexcept;
 
 	/**
 	 * Does the plugin announce the specified file name suffix?
 	 */
-	gcc_pure gcc_nonnull_all
+	[[gnu::pure]]
 	bool SupportsSuffix(std::string_view suffix) const noexcept;
 
 	/**
 	 * Does the plugin announce the specified MIME type?
 	 */
-	gcc_pure gcc_nonnull_all
+	[[gnu::pure]]
 	bool SupportsMimeType(std::string_view mime_type) const noexcept;
 };
 

src/playlist/PlaylistStream.hxx

@@ -5,7 +5,6 @@
 #define MPD_PLAYLIST_STREAM_HXX
 
 #include "thread/Mutex.hxx"
-#include "util/Compiler.h"
 
 #include <memory>
 
@@ -18,11 +17,10 @@ class Path;
  * @param path the path of the playlist file
  * @return a playlist, or nullptr on error
  */
-gcc_nonnull_all
 std::unique_ptr<SongEnumerator>
 playlist_open_path(Path path, Mutex &mutex);
 
-gcc_nonnull_all
+[[gnu::nonnull]]
 std::unique_ptr<SongEnumerator>
 playlist_open_remote(const char *uri, Mutex &mutex);
 

src/playlist/cue/CueParser.hxx

@@ -6,7 +6,6 @@
 
 #include "song/DetachedSong.hxx"
 #include "tag/Builder.hxx"
-#include "util/Compiler.h"
 
 #include <memory>
 #include <string>
@@ -108,7 +107,7 @@ public:
 	std::unique_ptr<DetachedSong> Get() noexcept;
 
 private:
-	gcc_pure
+	[[gnu::pure]]
 	TagBuilder *GetCurrentTag() noexcept;
 
 	/**