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

src/lib/gcrypt/Hash.hxx

@@ -31,7 +31,6 @@
 #define GCRYPT_HASH_HXX
 
 #include "util/ConstBuffer.hxx"
-#include "util/Compiler.h"
 
 #include <gcrypt.h>
 
@@ -40,7 +39,7 @@
 namespace Gcrypt {
 
 template<int algo, size_t size>
-gcc_pure
+[[gnu::pure]]
 auto
 Hash(ConstBuffer<void> input) noexcept
 {

src/lib/gcrypt/MD5.hxx

@@ -31,7 +31,6 @@
 #define GCRYPT_MD5_HXX
 
 #include "util/StringBuffer.hxx"
-#include "util/Compiler.h"
 
 #include <array>
 #include <cstdint>
@@ -40,7 +39,7 @@ template<typename T> struct ConstBuffer;
 
 namespace Gcrypt {
 
-gcc_pure
+[[gnu::pure]]
 std::array<uint8_t, 16>
 MD5(ConstBuffer<void> input) noexcept;