more [[gnu::...]] attributes

src/fs/io/AutoGunzipReader.cxx

@@ -25,7 +25,7 @@ AutoGunzipReader::AutoGunzipReader(Reader &_next) noexcept
 
 AutoGunzipReader::~AutoGunzipReader() noexcept = default;
 
-gcc_pure
+[[gnu::pure]]
 static bool
 IsGzip(const uint8_t data[4]) noexcept
 {

src/fs/io/BufferedReader.hxx

@@ -30,7 +30,6 @@
 #ifndef BUFFERED_READER_HXX
 #define BUFFERED_READER_HXX
 
-#include "util/Compiler.h"
 #include "util/DynamicFifoBuffer.hxx"
 
 #include <cstddef>
@@ -64,7 +63,7 @@ public:
 
 	bool Fill(bool need_more);
 
-	gcc_pure
+	[[gnu::pure]]
 	WritableBuffer<void> Read() const noexcept {
 		return buffer.Read().ToVoid();
 	}

src/fs/io/FileOutputStream.hxx

@@ -32,7 +32,6 @@
 
 #include "OutputStream.hxx"
 #include "fs/AllocatedPath.hxx"
-#include "util/Compiler.h"
 
 #ifndef _WIN32
 #include "io/FileDescriptor.hxx"
@@ -133,7 +132,7 @@ public:
 		return path;
 	}
 
-	gcc_pure
+	[[gnu::pure]]
 	uint64_t Tell() const noexcept;
 
 	/* virtual methods from class OutputStream */

src/fs/io/FileReader.hxx

@@ -32,7 +32,6 @@
 
 #include "Reader.hxx"
 #include "fs/AllocatedPath.hxx"
-#include "util/Compiler.h"
 
 #ifdef _WIN32
 #include <fileapi.h>
@@ -94,7 +93,7 @@ public:
 
 	FileInfo GetFileInfo() const;
 
-	gcc_pure
+	[[gnu::pure]]
 	uint64_t GetSize() const noexcept {
 #ifdef _WIN32
 		LARGE_INTEGER size;
@@ -106,7 +105,7 @@ public:
 #endif
 	}
 
-	gcc_pure
+	[[gnu::pure]]
 	uint64_t GetPosition() const noexcept {
 #ifdef _WIN32
 		LARGE_INTEGER zero;

src/fs/io/Reader.hxx

@@ -30,8 +30,6 @@
 #ifndef READER_HXX
 #define READER_HXX
 
-#include "util/Compiler.h"
-
 #include <cstddef>
 
 /**
@@ -52,7 +50,7 @@ public:
 	 * @return the number of bytes read into the given buffer or 0
 	 * on end-of-stream
 	 */
-	gcc_nonnull_all
+	[[gnu::nonnull]]
 	virtual size_t Read(void *data, size_t size) = 0;
 };