From 0b063de9fff3a009f0e961466fdd2a3fa8d6efd5 Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Tue, 21 Apr 2015 04:30:34 +0000
Subject: [PATCH] fix more warnings

---
 include/libtorrent/aux_/session_impl.hpp      | 18 ++++++++--
 include/libtorrent/aux_/session_interface.hpp | 12 +++++--
 include/libtorrent/extensions/ut_pex.hpp      |  8 ++++-
 include/libtorrent/file_storage.hpp           |  2 +-
 .../libtorrent/http_tracker_connection.hpp    |  4 +++
 include/libtorrent/lsd.hpp                    |  6 +++-
 include/libtorrent/peer_connection.hpp        |  6 +++-
 include/libtorrent/peer_info.hpp              |  2 --
 include/libtorrent/peer_list.hpp              |  1 +
 include/libtorrent/request_blocks.hpp         |  6 ++++
 include/libtorrent/session.hpp                |  1 +
 include/libtorrent/torrent.hpp                |  6 +++-
 include/libtorrent/tracker_manager.hpp        |  6 +++-
 src/disk_buffer_pool.cpp                      | 11 +++---
 src/file_storage.cpp                          |  6 ++--
 src/gzip.cpp                                  |  8 +++--
 src/lsd.cpp                                   | 36 ++++++++++++-------
 src/peer_connection.cpp                       |  5 +++
 src/platform_util.cpp                         |  6 ++++
 src/puff.cpp                                  |  7 ++++
 src/request_blocks.cpp                        |  5 +--
 src/session_impl.cpp                          | 10 ++++++
 src/session_stats.cpp                         |  2 ++
 src/torrent.cpp                               | 13 +++++--
 src/ut_pex.cpp                                |  2 ++
 25 files changed, 143 insertions(+), 46 deletions(-)

diff --git a/include/libtorrent/aux_/session_impl.hpp b/include/libtorrent/aux_/session_impl.hpp
index 5f1c9a76a..193d494de 100644
--- a/include/libtorrent/aux_/session_impl.hpp
+++ b/include/libtorrent/aux_/session_impl.hpp
@@ -1128,8 +1128,16 @@ namespace libtorrent
 			boost::uint16_t m_tick_residual;
 
 #ifndef TORRENT_DISABLE_LOGGING
-			virtual void session_log(char const* fmt, ...) const;
-			virtual void session_vlog(char const* fmt, va_list& va) const;
+			virtual void session_log(char const* fmt, ...) const
+#if defined __GNUC__ || defined __clang__
+			__attribute__((format(printf, 2, 3)))
+#endif
+				;
+			virtual void session_vlog(char const* fmt, va_list& va) const
+#if defined __GNUC__ || defined __clang__
+				__attribute__((format(printf, 2, 0)))
+#endif
+				;
 
 			// this list of tracker loggers serves as tracker_callbacks when
 			// shutting down. This list is just here to keep them alive during
@@ -1214,7 +1222,11 @@ namespace libtorrent
 			void tracker_request_error(tracker_request const& r
 				, int response_code, error_code const& ec, const std::string& str
 				, int retry_interval);
-			void debug_log(const char* fmt, ...) const;
+			void debug_log(const char* fmt, ...) const
+#if defined __GNUC__ || defined __clang__
+				__attribute__((format(printf, 2, 3)))
+#endif
+				;
 			session_interface& m_ses;
 		};
 #endif
diff --git a/include/libtorrent/aux_/session_interface.hpp b/include/libtorrent/aux_/session_interface.hpp
index 456c96565..d63322e14 100644
--- a/include/libtorrent/aux_/session_interface.hpp
+++ b/include/libtorrent/aux_/session_interface.hpp
@@ -109,8 +109,16 @@ namespace libtorrent { namespace aux
 	struct session_logger
 	{
 #ifndef TORRENT_DISABLE_LOGGING
-		virtual void session_log(char const* fmt, ...) const = 0;
-		virtual void session_vlog(char const* fmt, va_list& va) const = 0;
+		virtual void session_log(char const* fmt, ...) const
+#if defined __GNUC__ || defined __clang__
+			__attribute__((format(printf, 2, 3)))
+#endif
+			= 0;
+		virtual void session_vlog(char const* fmt, va_list& va) const
+#if defined __GNUC__ || defined __clang__
+			__attribute__((format(printf, 2, 0)))
+#endif
+			= 0;
 #endif
 
 #if TORRENT_USE_ASSERTS
diff --git a/include/libtorrent/extensions/ut_pex.hpp b/include/libtorrent/extensions/ut_pex.hpp
index 1b23261a9..64b5941e4 100644
--- a/include/libtorrent/extensions/ut_pex.hpp
+++ b/include/libtorrent/extensions/ut_pex.hpp
@@ -33,18 +33,22 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef TORRENT_UT_PEX_EXTENSION_HPP_INCLUDED
 #define TORRENT_UT_PEX_EXTENSION_HPP_INCLUDED
 
+#include "libtorrent/config.hpp"
+
 #ifndef TORRENT_DISABLE_EXTENSIONS
 
+#include "libtorrent/socket.hpp" // for endpoint
+
 #include "libtorrent/aux_/disable_warnings_push.hpp"
 
 #include <boost/shared_ptr.hpp>
-#include "libtorrent/config.hpp"
 
 #include "libtorrent/aux_/disable_warnings_pop.hpp"
 
 namespace libtorrent
 {
 	struct torrent_plugin;
+	struct peer_plugin;
 	class torrent;
 
 	// constructor function for the ut_pex extension. The ut_pex
@@ -56,6 +60,8 @@ namespace libtorrent
 	// This can either be passed in the add_torrent_params::extensions field, or
 	// via torrent_handle::add_extension().
 	TORRENT_EXPORT boost::shared_ptr<torrent_plugin> create_ut_pex_plugin(torrent*, void*);
+
+	bool was_introduced_by(peer_plugin const* pp, tcp::endpoint const& ep);
 }
 
 #endif // TORRENT_DISABLE_EXTENSIONS
diff --git a/include/libtorrent/file_storage.hpp b/include/libtorrent/file_storage.hpp
index 44ea3d579..f54e147fe 100644
--- a/include/libtorrent/file_storage.hpp
+++ b/include/libtorrent/file_storage.hpp
@@ -309,7 +309,7 @@ namespace libtorrent
 
 #ifndef TORRENT_NO_DEPRECATE
 		TORRENT_DEPRECATED
-		void add_file(file_entry const& fe, char const* infohash = NULL);
+		void add_file(file_entry const& fe, char const* filehash = NULL);
 
 #if TORRENT_USE_WSTRING
 		// all wstring APIs are deprecated since 0.16.11
diff --git a/include/libtorrent/http_tracker_connection.hpp b/include/libtorrent/http_tracker_connection.hpp
index cb5da1332..f2ea8640d 100644
--- a/include/libtorrent/http_tracker_connection.hpp
+++ b/include/libtorrent/http_tracker_connection.hpp
@@ -98,6 +98,10 @@ namespace libtorrent
 	TORRENT_EXTRA_EXPORT tracker_response parse_tracker_response(
 		char const* data, int size, error_code& ec
 		, bool scrape_request, sha1_hash scrape_ih);
+
+	// TODO: 3 add a unit test for this function
+	TORRENT_EXTRA_EXPORT bool extract_peer_info(bdecode_node const& info
+		, peer_entry& ret, error_code& ec);
 }
 
 #endif // TORRENT_HTTP_TRACKER_CONNECTION_HPP_INCLUDED
diff --git a/include/libtorrent/lsd.hpp b/include/libtorrent/lsd.hpp
index e209482e9..a6e61d286 100644
--- a/include/libtorrent/lsd.hpp
+++ b/include/libtorrent/lsd.hpp
@@ -95,7 +95,11 @@ private:
 #endif
 #ifndef TORRENT_DISABLE_LOGGING
 	log_callback_t m_log_cb;
-	void debug_log(char const* fmt, ...) const;
+	void debug_log(char const* fmt, ...) const
+#if defined __GNUC__ || defined __clang__
+		__attribute__((format(printf, 2, 3)))
+#endif
+		;
 #endif
 
 	// used to resend udp packets in case
diff --git a/include/libtorrent/peer_connection.hpp b/include/libtorrent/peer_connection.hpp
index 464771571..21fc84e90 100644
--- a/include/libtorrent/peer_connection.hpp
+++ b/include/libtorrent/peer_connection.hpp
@@ -548,7 +548,11 @@ namespace libtorrent
 		int est_reciprocation_rate() const { return m_est_reciprocation_rate; }
 
 #ifndef TORRENT_DISABLE_LOGGING
-		virtual void peer_log(char const* fmt, ...) const;
+		virtual void peer_log(char const* fmt, ...) const
+#if defined __GNUC__ || defined __clang__
+			__attribute__((format(printf, 2, 3)))
+#endif
+			;
 #endif
 
 #ifndef TORRENT_DISABLE_LOGGING
diff --git a/include/libtorrent/peer_info.hpp b/include/libtorrent/peer_info.hpp
index 5f8054336..8cc343bb8 100644
--- a/include/libtorrent/peer_info.hpp
+++ b/include/libtorrent/peer_info.hpp
@@ -452,8 +452,6 @@ namespace libtorrent
 		boost::uint8_t source;
 	};
 
-	// defined in policy.cpp
-	int source_rank(int source_bitmask);
 }
 
 #endif // TORRENT_PEER_INFO_HPP_INCLUDED
diff --git a/include/libtorrent/peer_list.hpp b/include/libtorrent/peer_list.hpp
index d85c6d796..93f859be0 100644
--- a/include/libtorrent/peer_list.hpp
+++ b/include/libtorrent/peer_list.hpp
@@ -36,6 +36,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <algorithm>
 #include <deque>
 #include "libtorrent/string_util.hpp" // for allocate_string_copy
+#include "libtorrent/request_blocks.hpp" // for source_rank
 
 #include "libtorrent/torrent_peer.hpp"
 #include "libtorrent/piece_picker.hpp"
diff --git a/include/libtorrent/request_blocks.hpp b/include/libtorrent/request_blocks.hpp
index 04bc4cedf..3e65d2d18 100644
--- a/include/libtorrent/request_blocks.hpp
+++ b/include/libtorrent/request_blocks.hpp
@@ -43,6 +43,12 @@ namespace libtorrent
 	// shouldn't be incremented, since it won't use any significant
 	// amount of CPU
 	bool request_a_block(torrent& t, peer_connection& c);
+
+	// returns the rank of a peer's source. We have an affinity
+	// to connecting to peers with higher rank. This is to avoid
+	// problems when our peer list is diluted by stale peers from
+	// the resume data for instance
+	int source_rank(int source_bitmask);
 }
 
 #endif
diff --git a/include/libtorrent/session.hpp b/include/libtorrent/session.hpp
index 50fa6f5a1..63d18c032 100644
--- a/include/libtorrent/session.hpp
+++ b/include/libtorrent/session.hpp
@@ -139,6 +139,7 @@ namespace libtorrent
 	// given a name of a metric, this function returns the counter index of it,
 	// or -1 if it could not be found. The counter index is the index into the
 	// values array returned by session_stats_alert.
+	// TODO: 3 move this declaration into its own header (session_stats.hpp)
 	TORRENT_EXPORT int find_metric_idx(char const* name);
 
 	void TORRENT_EXPORT TORRENT_CFG();
diff --git a/include/libtorrent/torrent.hpp b/include/libtorrent/torrent.hpp
index d37020b2b..66e8a8ec1 100644
--- a/include/libtorrent/torrent.hpp
+++ b/include/libtorrent/torrent.hpp
@@ -1022,7 +1022,11 @@ namespace libtorrent
 
 		// LOGGING
 #ifndef TORRENT_DISABLE_LOGGING
-		virtual void debug_log(const char* fmt, ...) const TORRENT_OVERRIDE;
+		virtual void debug_log(const char* fmt, ...) const TORRENT_OVERRIDE
+#if defined __GNUC__ || defined __clang__
+			__attribute__((format(printf, 2, 3)))
+#endif
+			;
 		void log_to_all_peers(char const* message);
 		time_point m_dht_start_time;
 #endif
diff --git a/include/libtorrent/tracker_manager.hpp b/include/libtorrent/tracker_manager.hpp
index 68de1badf..5d1cf0490 100644
--- a/include/libtorrent/tracker_manager.hpp
+++ b/include/libtorrent/tracker_manager.hpp
@@ -229,7 +229,11 @@ namespace libtorrent
 			, int retry_interval) = 0;
 
 #ifndef TORRENT_DISABLE_LOGGING
-		virtual void debug_log(const char* fmt, ...) const = 0;
+		virtual void debug_log(const char* fmt, ...) const
+#if defined __GNUC__ || defined __clang__
+			__attribute__((format(printf, 2, 3)))
+#endif
+			= 0;
 #endif
 	};
 
diff --git a/src/disk_buffer_pool.cpp b/src/disk_buffer_pool.cpp
index babfb67ca..cebde4fb7 100644
--- a/src/disk_buffer_pool.cpp
+++ b/src/disk_buffer_pool.cpp
@@ -218,19 +218,16 @@ namespace libtorrent
 #if TORRENT_HAVE_MMAP
 		if (m_cache_pool)
 		{
-			return buffer >= m_cache_pool && buffer < m_cache_pool + boost::uint64_t(m_max_use) * 0x4000;
+			return buffer >= m_cache_pool && buffer < m_cache_pool
+				+ boost::uint64_t(m_max_use) * 0x4000;
 		}
 #endif
 
 #if defined TORRENT_DEBUG
 		return m_buffers_in_use.count(buffer) == 1;
-#endif
-
-#ifdef TORRENT_DEBUG_BUFFERS
+#elif defined TORRENT_DEBUG_BUFFERS
 		return page_aligned_allocator::in_use(buffer);
-#endif
-
-#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
+#elif defined TORRENT_DISABLE_POOL_ALLOCATOR
 		return true;
 #else
 		if (m_using_pool_allocator)
diff --git a/src/file_storage.cpp b/src/file_storage.cpp
index 5c2714910..220ea9f71 100644
--- a/src/file_storage.cpp
+++ b/src/file_storage.cpp
@@ -315,7 +315,7 @@ namespace libtorrent
 
 #ifndef TORRENT_NO_DEPRECATE
 
-	void file_storage::add_file(file_entry const& fe, char const* infohash)
+	void file_storage::add_file(file_entry const& fe, char const* filehash)
 	{
 		int flags = 0;
 		if (fe.pad_file) flags |= file_storage::flag_pad_file;
@@ -323,7 +323,7 @@ namespace libtorrent
 		if (fe.executable_attribute) flags |= file_storage::flag_executable;
 		if (fe.symlink_attribute) flags |= file_storage::flag_symlink;
 
-		add_file_borrow(NULL, 0, fe.path, fe.size, flags, NULL, fe.mtime
+		add_file_borrow(NULL, 0, fe.path, fe.size, flags, filehash, fe.mtime
 			, fe.symlink_path);
 	}
 
@@ -866,7 +866,7 @@ namespace libtorrent
 		, std::string const& save_path) const
 	{
 		int index = &fe - &m_files[0];
-		return file_path(index);
+		return file_path(index, save_path);
 	}
 
 	std::string file_storage::file_name(internal_file_entry const& fe) const
diff --git a/src/gzip.cpp b/src/gzip.cpp
index ec0eb5b1b..c19f62681 100644
--- a/src/gzip.cpp
+++ b/src/gzip.cpp
@@ -214,12 +214,14 @@ namespace libtorrent
 		{
 			TORRENT_TRY {
 				buffer.resize(destlen);
-			} TORRENT_CATCH(std::exception& e) {
+			} TORRENT_CATCH(std::exception&) {
 				ec = errors::no_memory;
 				return;
 			}
 
-			ret = puff((unsigned char*)&buffer[0], &destlen, (unsigned char*)in, &srclen);
+			ret = puff(reinterpret_cast<unsigned char*>(&buffer[0]), &destlen
+				, const_cast<unsigned char*>(
+					reinterpret_cast<const unsigned char*>(in)), &srclen);
 
 			// if the destination buffer wasn't large enough, double its
 			// size and try again. Unless it's already at its max, in which
@@ -233,7 +235,7 @@ namespace libtorrent
 				}
 
 				destlen *= 2;
-				if (destlen > (unsigned int)maximum_size)
+				if (destlen > boost::uint32_t(maximum_size))
 					destlen = maximum_size;
 			}
 		} while (ret == 1);
diff --git a/src/lsd.cpp b/src/lsd.cpp
index c8ad8b3b3..2cef814b2 100644
--- a/src/lsd.cpp
+++ b/src/lsd.cpp
@@ -42,6 +42,8 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/debug.hpp"
 #endif
 
+#include "libtorrent/aux_/disable_warnings_push.hpp"
+
 #include <boost/bind.hpp>
 #include <boost/ref.hpp>
 #if BOOST_VERSION < 103500
@@ -55,13 +57,27 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <boost/config.hpp>
 #include <cstdarg>
 
-using namespace libtorrent;
+#include "libtorrent/aux_/disable_warnings_pop.hpp"
 
 namespace libtorrent
 {
 	// defined in broadcast_socket.cpp
 	address guess_local_address(io_service&);
+
+namespace {
+
+int render_lsd_packet(char* dst, int len, int listen_port
+	, char const* info_hash_hex, int m_cookie, char const* host)
+{
+	return snprintf(dst, len,
+		"BT-SEARCH * HTTP/1.1\r\n"
+		"Host: %s:6771\r\n"
+		"Port: %d\r\n"
+		"Infohash: %s\r\n"
+		"cookie: %x\r\n"
+		"\r\n\r\n", host, listen_port, info_hash_hex, m_cookie);
 }
+} // anonymous namespace
 
 static error_code ec;
 
@@ -88,6 +104,9 @@ lsd::lsd(io_service& ios, peer_callback_t const& cb
 }
 
 #ifndef TORRENT_DISABLE_LOGGING
+#if defined __GNUC__ || defined __clang__
+__attribute__((format(printf, 2, 3)))
+#endif
 void lsd::debug_log(char const* fmt, ...) const
 {
 	va_list v;
@@ -114,18 +133,6 @@ void lsd::start(error_code& ec)
 
 lsd::~lsd() {}
 
-int render_lsd_packet(char* dst, int len, int listen_port
-	, char const* info_hash_hex, int m_cookie, char const* host)
-{
-	return snprintf(dst, len,
-		"BT-SEARCH * HTTP/1.1\r\n"
-		"Host: %s:6771\r\n"
-		"Port: %d\r\n"
-		"Infohash: %s\r\n"
-		"cookie: %x\r\n"
-		"\r\n\r\n", host, listen_port, info_hash_hex, m_cookie);
-}
-
 void lsd::announce(sha1_hash const& ih, int listen_port, bool broadcast)
 {
 	announce_impl(ih, listen_port, broadcast, 0);
@@ -314,3 +321,6 @@ void lsd::close()
 	m_callback.clear();
 }
 
+} // libtorrent namespace
+
+
diff --git a/src/peer_connection.cpp b/src/peer_connection.cpp
index fec804677..a2e20524f 100644
--- a/src/peer_connection.cpp
+++ b/src/peer_connection.cpp
@@ -516,6 +516,9 @@ namespace libtorrent
 	}
 
 #ifndef TORRENT_DISABLE_LOGGING
+#if defined __GNUC__ || defined __clang__
+	__attribute__((format(printf, 2, 3)))
+#endif
 	void peer_connection::peer_log(char const* fmt, ...) const
 	{
 		TORRENT_ASSERT(is_single_thread());
@@ -5696,6 +5699,8 @@ namespace libtorrent
 	void peer_connection::send_buffer(char const* buf, int size, int flags)
 	{
 		TORRENT_ASSERT(is_single_thread());
+		TORRENT_UNUSED(flags);
+
 		int free_space = m_send_buffer.space_in_last_buffer();
 		if (free_space > size) free_space = size;
 		if (free_space > 0)
diff --git a/src/platform_util.cpp b/src/platform_util.cpp
index aa3628da3..000a0e498 100644
--- a/src/platform_util.cpp
+++ b/src/platform_util.cpp
@@ -31,6 +31,10 @@ POSSIBILITY OF SUCH DAMAGE.
 */
 
 #include "libtorrent/config.hpp"
+#include "libtorrent/platform_util.hpp"
+
+#include "libtorrent/aux_/disable_warnings_push.hpp"
+
 #include <boost/cstdint.hpp>
 
 #if TORRENT_USE_RLIMIT
@@ -46,6 +50,8 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <windows.h>
 #endif
 
+#include "libtorrent/aux_/disable_warnings_pop.hpp"
+
 namespace libtorrent
 {
 
diff --git a/src/puff.cpp b/src/puff.cpp
index 82347e779..8074fef38 100644
--- a/src/puff.cpp
+++ b/src/puff.cpp
@@ -70,6 +70,10 @@ All "short" has been replaced with boost::int16_t
 and all "long" with boost::int32_t according to the
 type width assuptions in the comment above.
 */
+
+// this whole file is just preserved and warnings are suppressed
+#include "libtorrent/aux_/disable_warnings_push.hpp"
+
 #include <setjmp.h>             /* for setjmp(), longjmp(), and jmp_buf */
 #include <boost/cstdint.hpp>    /* for types with size guarantees */
 #include "libtorrent/puff.hpp"  /* prototype for puff() */
@@ -840,3 +844,6 @@ int main(int argc, char **argv)
     return ret;
 }
 #endif
+
+#include "libtorrent/aux_/disable_warnings_pop.hpp"
+
diff --git a/src/request_blocks.cpp b/src/request_blocks.cpp
index 995c97bb3..937b1da51 100644
--- a/src/request_blocks.cpp
+++ b/src/request_blocks.cpp
@@ -36,15 +36,12 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/socket_type.hpp"
 #include "libtorrent/peer_info.hpp" // for peer_info flags
 #include "libtorrent/performance_counters.hpp" // for counters
+#include "libtorrent/request_blocks.hpp"
 
 #include <vector>
 
 namespace libtorrent
 {
-	// returns the rank of a peer's source. We have an affinity
-	// to connecting to peers with higher rank. This is to avoid
-	// problems when our peer list is diluted by stale peers from
-	// the resume data for instance
 	int source_rank(int source_bitmask)
 	{
 		int ret = 0;
diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index efe41905a..be1b7df1e 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -4247,6 +4247,8 @@ retry:
 	}
 #endif //TORRENT_DISABLE_MUTABLE_TORRENTS
 
+	namespace {
+
 	// returns true if lhs is a better disconnect candidate than rhs
 	bool compare_disconnect_torrent(session_impl::torrent_map::value_type const& lhs
 		, session_impl::torrent_map::value_type const& rhs)
@@ -4264,6 +4266,8 @@ retry:
 		return lhs.second->num_peers() > rhs.second->num_peers();
 	}
 
+	} // anonymous namespace
+
  	boost::weak_ptr<torrent> session_impl::find_disconnect_candidate_torrent() const
  	{
 		aux::session_impl::torrent_map::const_iterator i = std::min_element(m_torrents.begin(), m_torrents.end()
@@ -4276,6 +4280,9 @@ retry:
 	}
 
 #ifndef TORRENT_DISABLE_LOGGING
+#if defined __GNUC__ || defined __clang__
+	__attribute__((format(printf, 2, 3)))
+#endif
 	void session_impl::session_log(char const* fmt, ...) const
 	{
 		if (!m_alerts.should_post<log_alert>()) return;
@@ -4286,6 +4293,9 @@ retry:
 		va_end(v);
 	}
 	
+#if defined __GNUC__ || defined __clang__
+	__attribute__((format(printf, 2, 0)))
+#endif
 	void session_impl::session_vlog(char const* fmt, va_list& v) const
 	{
 		if (!m_alerts.should_post<log_alert>()) return;
diff --git a/src/session_stats.cpp b/src/session_stats.cpp
index 30b47fb93..a67876f35 100644
--- a/src/session_stats.cpp
+++ b/src/session_stats.cpp
@@ -518,6 +518,8 @@ namespace libtorrent
 	};
 #undef METRIC
 
+	// TODO: 3 create a header for this file and declare these two functions.
+	// currently this is externed into session.cpp
 	void get_stats_metric_map(std::vector<stats_metric>& stats)
 	{
 		const int num = sizeof(metrics)/sizeof(metrics[0]);
diff --git a/src/torrent.cpp b/src/torrent.cpp
index 5051b3384..a66fd2f2b 100644
--- a/src/torrent.cpp
+++ b/src/torrent.cpp
@@ -3166,7 +3166,7 @@ namespace libtorrent
 	}
 	
  	void torrent::tracker_scrape_response(tracker_request const& req
- 		, int complete, int incomplete, int downloaded, int downloaders)
+ 		, int complete, int incomplete, int downloaded, int /* downloaders */)
  	{
 		TORRENT_ASSERT(is_single_thread());
  
@@ -4931,7 +4931,7 @@ namespace libtorrent
 		}
 	}
 
-	void torrent::on_torrent_paused(disk_io_job const* j)
+	void torrent::on_torrent_paused(disk_io_job const*)
 	{
 		TORRENT_ASSERT(is_single_thread());
 
@@ -8895,12 +8895,16 @@ namespace libtorrent
 		}
 	}
 
+	namespace {
+
 	int clamped_subtract(int a, int b)
 	{
 		if (a < b) return 0;
 		return a - b;
 	}
 
+	} // anonymous namespace
+
 	// this is called every time the session timer takes a step back. Since the
 	// session time is meant to fit in 16 bits, it only covers a range of
 	// about 18 hours. This means every few hours the whole epoch of this
@@ -9118,7 +9122,7 @@ namespace libtorrent
 			, boost::bind(&torrent::on_cache_flushed, shared_from_this(), _1));
 	}
 
-	void torrent::on_cache_flushed(disk_io_job const* j)
+	void torrent::on_cache_flushed(disk_io_job const*)
 	{
 		dec_refcount("release_files");
 		TORRENT_ASSERT(is_single_thread());
@@ -11646,6 +11650,9 @@ namespace libtorrent
 	}
 
 #ifndef TORRENT_DISABLE_LOGGING
+#if defined __GNUC__ || defined __clang__
+	__attribute__((format(printf, 2, 3)))
+#endif
 	void torrent::debug_log(char const* fmt, ...) const
 	{
 		if (!alerts().should_post<torrent_log_alert>()) return;
diff --git a/src/ut_pex.cpp b/src/ut_pex.cpp
index 8ac29742e..163e93f2b 100644
--- a/src/ut_pex.cpp
+++ b/src/ut_pex.cpp
@@ -30,6 +30,8 @@ POSSIBILITY OF SUCH DAMAGE.
 
 */
 
+#include "libtorrent/config.hpp"
+
 #ifndef TORRENT_DISABLE_EXTENSIONS
 
 #include "libtorrent/aux_/disable_warnings_push.hpp"