fft warning gcc

include/boost/multi/adaptors/fft.hpp

@@ -158,8 +158,13 @@ namespace boost::multi::fft{
 		return dft(which, std::forward<In>(in), fft::forward);
 	}
 
+#if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-value"
+#elif defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-value"
+#endif
 	template<class In>
 	auto dft_all(In&& in) {
 		auto const all_true = std::apply([](auto... es) { return std::array{(es, true)...}; }, std::array<bool, std::decay_t<In>::dimensionality>{});
@@ -171,8 +176,11 @@ namespace boost::multi::fft{
 		auto const all_true = std::apply([](auto... es) { return std::array{(es, true)...}; }, std::array<bool, std::decay_t<In>::dimensionality>{});
 		return dft(all_true, std::forward<In>(in), fft::backward);
 	}
+#if defined(__clang__)
 #pragma clang diagnostic pop
-
+#elif defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
 
 	template<class In, class Direction>
 	auto idft(std::array<bool, In::dimensionality> which, In&& in) {