fix warnings

src/file.cpp

@@ -315,11 +315,23 @@ namespace {
 	}
 } // namespace
 # else
+
+#  ifdef __clang__
+#   pragma clang diagnostic push
+#   pragma clang diagnostic ignored "-Wreserved-id-macro"
+#   pragma clang diagnostic ignored "-Wunused-macros"
+#  endif
+
 #  undef _BSD_SOURCE
 #  define _BSD_SOURCE // deprecated since glibc 2.20
 #  undef _DEFAULT_SOURCE
 #  define _DEFAULT_SOURCE
 #  include <sys/uio.h>
+
+#  ifdef __clang__
+#   pragma clang diagnostic pop
+#  endif
+
 # endif
 #endif
 

src/path.cpp

@@ -140,10 +140,16 @@ namespace libtorrent {
 	std::string convert_from_native_path(char const* s) { return convert_from_native(s); }
 #endif
 
-	template <typename T>
-	std::unique_ptr<T, decltype(&std::free)> make_free_holder(T* ptr)
+namespace {
+	struct free_function
 	{
-		return std::unique_ptr<T, decltype(&std::free)>(ptr, &std::free);
+		void operator()(void* ptr) const noexcept { std::free(ptr); }
+	};
+
+	template <typename T>
+	std::unique_ptr<T, free_function> make_free_holder(T* ptr)
+	{
+		return std::unique_ptr<T, free_function>(ptr, free_function{});
 	}
 
 #ifdef TORRENT_WINDOWS
@@ -158,6 +164,7 @@ namespace libtorrent {
 		return time_t(ft / 10000000 - posix_time_offset);
 	}
 #endif
+} // anonymous namespace
 
 	native_path_string convert_to_native_path_string(std::string const& path)
 	{

src/session_impl.cpp

@@ -115,9 +115,11 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #ifdef TORRENT_USE_LIBGCRYPT
 
+#if GCRYPT_VERSION_NUMBER < 0x010600
 extern "C" {
 GCRY_THREAD_OPTION_PTHREAD_IMPL;
 }
+#endif
 
 namespace {
 
@@ -126,11 +128,13 @@ namespace {
 	{
 		gcrypt_setup()
 		{
-			gcry_check_version(0);
+			gcry_check_version(nullptr);
+#if GCRYPT_VERSION_NUMBER < 0x010600
 			gcry_error_t e = gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
 			if (e != 0) std::fprintf(stderr, "libcrypt ERROR: %s\n", gcry_strerror(e));
 			e = gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
 			if (e != 0) std::fprintf(stderr, "initialization finished error: %s\n", gcry_strerror(e));
+#endif
 		}
 	} gcrypt_global_constructor;
 }
@@ -475,8 +479,8 @@ namespace aux {
 		session_log("start session");
 #endif
 
-		error_code ec;
 #ifdef TORRENT_USE_OPENSSL
+		error_code ec;
 		m_ssl_ctx.set_verify_mode(boost::asio::ssl::context::verify_none, ec);
 #if OPENSSL_VERSION_NUMBER >= 0x90812f
 		aux::openssl_set_tlsext_servername_callback(m_ssl_ctx.native_handle()

src/upnp.cpp

@@ -887,7 +887,6 @@ void upnp::delete_port_mapping(rootdevice& d, port_mapping_t const i)
 	char const* soap_action = "DeletePortMapping";
 
 	char soap[2048];
-	error_code ec;
 	std::snprintf(soap, sizeof(soap), "<?xml version=\"1.0\"?>\n"
 		"<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" "
 		"s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"

test/bittorrent_peer.cpp

@@ -141,7 +141,6 @@ void peer_conn::write_have_all()
 		// unchoke
 		write_uint32(1, ptr);
 		write_uint8(1, ptr);
-		error_code ec;
 		boost::asio::async_write(s, boost::asio::buffer(write_buf_proto.data()
 			, static_cast<std::size_t>(ptr - write_buf_proto.data()))
 			, std::bind(&peer_conn::on_have_all_sent, this, _1, _2));
@@ -158,7 +157,6 @@ void peer_conn::write_have_all()
 		// unchoke
 		write_uint32(1, ptr);
 		write_uint8(1, ptr);
-		error_code ec;
 		boost::asio::async_write(s, boost::asio::buffer(buffer.data()
 			, static_cast<std::size_t>(len + 10))
 			, std::bind(&peer_conn::on_have_all_sent, this, _1, _2));
@@ -224,7 +222,6 @@ bool peer_conn::write_request()
 	write_uint32(current_piece, ptr);
 	write_uint32(block * 16 * 1024, ptr);
 	write_uint32(16 * 1024, ptr);
-	error_code ec;
 	boost::asio::async_write(s, boost::asio::buffer(m, sizeof(msg) - 1)
 		, std::bind(&peer_conn::on_req_sent, this, m, _1, _2));
 

test/test_ip_filter.cpp

@@ -96,7 +96,6 @@ TORRENT_TEST(session_get_ip_filter)
 TORRENT_TEST(ip_filter)
 {
 	std::vector<ip_range<address_v4>> range;
-	error_code ec;
 
 	// **** test joining of ranges at the end ****
 	ip_range<address_v4> expected1[] =

test/test_remap_files.cpp

@@ -59,9 +59,6 @@ void test_remap_files(storage_mode_t storage_mode = storage_mode_sparse)
 {
 	using namespace lt;
 
-	// in case the previous run was terminated
-	error_code ec;
-
 	// create a torrent with 2 files, remap them into 3 files and make sure
 	// the file priorities don't break things
 	static std::array<const int, 2> const file_sizes{{100000, 100000}};

test/test_storage.cpp

@@ -982,7 +982,7 @@ void alloc_iov(iovec_t* iov, int num_bufs)
 {
 	for (int i = 0; i < num_bufs; ++i)
 	{
-		iov[i] = { new char[num_bufs * (i + 1)]
+		iov[i] = { new char[static_cast<std::size_t>(num_bufs * (i + 1))]
 			, static_cast<std::size_t>(num_bufs * (i + 1)) };
 	}
 }

test/test_torrent.cpp

@@ -636,7 +636,6 @@ TORRENT_TEST(test_have_piece_no_metadata)
 TORRENT_TEST(test_have_piece_out_of_range)
 {
 	lt::session ses(settings());
-	error_code ec;
 
 	add_torrent_params p;
 	static std::array<const int, 2> const file_sizes{{100000, 100000}};
@@ -672,7 +671,6 @@ TORRENT_TEST(test_read_piece_no_metadata)
 TORRENT_TEST(test_read_piece_out_of_range)
 {
 	lt::session ses(settings());
-	error_code ec;
 
 	add_torrent_params p;
 	static std::array<const int, 2> const file_sizes{{100000, 100000}};