Enabled more compiler warnings

src/common.h

@@ -334,6 +334,8 @@ void* realloc_hook(void* ptr, size_t size) noexcept;
 void* calloc_hook(size_t count, size_t size) noexcept;
 void free_hook(void* p) noexcept;
 
+extern const char* BLOCK_FOUND;
+
 } // namespace p2pool
 
 #include "util.h"

src/side_chain.cpp

@@ -390,8 +390,6 @@ void SideChain::unsee_block(const PoolBlock& block)
 	m_seenBlocks.erase(block.m_sidechainId);
 }
 
-extern const char* BLOCK_FOUND;
-
 bool SideChain::add_external_block(PoolBlock& block, std::vector<hash>& missing_blocks)
 {
 	if (block.m_difficulty < m_minDifficulty) {

src/stratum_server.cpp

@@ -1035,12 +1035,9 @@ bool StratumServer::StratumClient::process_request(char* data, uint32_t /*size*/
 		LOGINFO(6, "incoming keepalive from " << log::Gray() << static_cast<char*>(m_addrString));
 		return true;
 	}
-	else {
-		LOGWARN(4, "client " << static_cast<char*>(m_addrString) << " invalid JSON request (unknown method)");
-		return false;
-	}
 
-	return true;
+	LOGWARN(4, "client " << static_cast<char*>(m_addrString) << " invalid JSON request (unknown method)");
+	return false;
 }
 
 bool StratumServer::StratumClient::process_login(rapidjson::Document& doc, uint32_t id)

src/util.h

@@ -221,6 +221,10 @@ FORCEINLINE uint64_t bsr(uint64_t x)
 
 } // namespace p2pool
 
+void memory_tracking_start();
+void memory_tracking_stop();
+void p2pool_usage();
+
 namespace robin_hood {
 
 template<>