Use correct macro for GNU CC

diff --git a/pdns/ext/luawrapper/include/LuaContext.hpp b/pdns/ext/luawrapper/include/LuaContext.hpp
index 740f7d0ca96fcbe069f9a1786bef33547d5e6365..c977058fbce5be2d3d8c8a9778b2c3452b199d4a 100644 (file)
--- a/pdns/ext/luawrapper/include/LuaContext.hpp
+++ b/pdns/ext/luawrapper/include/LuaContext.hpp
@@ -58,7 +58,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #   include "misc/exception.hpp"
 #endif
 
-#ifdef _GNUC
+#ifdef __GNUC__
 #   define ATTR_UNUSED __attribute__((unused))
 #else
 #   define ATTR_UNUSED