Clean up warnings

* Use -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameters
* Remove xCXXFLAGS usage in makefile.unix
* Fix several recent and older sign-compare warnings

13 files changed, 24 insertions, 26 deletions

diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index c1f0c452ad..112e8e9389 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -90,7 +90,7 @@ contains(BITCOIN_NEED_QT_PLUGINS, 1) {
     DEFINES += HAVE_BUILD_INFO
 }
 
-QMAKE_CXXFLAGS_WARN_ON = -fdiagnostics-show-option -Wall -Wextra -Wformat -Wformat-security -Wno-invalid-offsetof -Wno-sign-compare -Wno-unused-parameter
+QMAKE_CXXFLAGS_WARN_ON = -fdiagnostics-show-option -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter
 
 # Input
 DEPENDPATH += src src/json src/qt
diff --git a/src/addrman.cpp b/src/addrman.cpp
index 10d005aae9..56ac9ca12c 100644
--- a/src/addrman.cpp
+++ b/src/addrman.cpp
@@ -102,12 +102,11 @@ CAddrInfo* CAddrMan::Create(const CAddress &addr, const CNetAddr &addrSource, in
     return &mapInfo[nId];
 }
 
-void CAddrMan::SwapRandom(int nRndPos1, int nRndPos2)
+void CAddrMan::SwapRandom(unsigned int nRndPos1, unsigned int nRndPos2)
 {
     if (nRndPos1 == nRndPos2)
         return;
 
-    assert(nRndPos1 >= 0 && nRndPos2 >= 0);
     assert(nRndPos1 < vRandom.size() && nRndPos2 < vRandom.size());
 
     int nId1 = vRandom[nRndPos1];
@@ -149,7 +148,7 @@ int CAddrMan::SelectTried(int nKBucket)
 
 int CAddrMan::ShrinkNew(int nUBucket)
 {
-    assert(nUBucket >= 0 && nUBucket < vvNew.size());
+    assert(nUBucket >= 0 && (unsigned int)nUBucket < vvNew.size());
     std::set<int> &vNew = vvNew[nUBucket];
 
     // first look for deletable items
diff --git a/src/addrman.h b/src/addrman.h
index 3768614cfe..43b6d35ed8 100644
--- a/src/addrman.h
+++ b/src/addrman.h
@@ -204,7 +204,7 @@ protected:
     CAddrInfo* Create(const CAddress &addr, const CNetAddr &addrSource, int *pnId = NULL);
 
     // Swap two elements in vRandom.
-    void SwapRandom(int nRandomPos1, int nRandomPos2);
+    void SwapRandom(unsigned int nRandomPos1, unsigned int nRandomPos2);
 
     // Return position in given bucket to replace.
     int SelectTried(int nKBucket);
diff --git a/src/main.cpp b/src/main.cpp
index b337993cc2..b0ed28aa14 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2060,7 +2060,7 @@ bool LoadExternalBlockFile(FILE* fileIn)
         try {
             CAutoFile blkdat(fileIn, SER_DISK, CLIENT_VERSION);
             unsigned int nPos = 0;
-            while (nPos != -1 && blkdat.good() && !fRequestShutdown)
+            while (nPos != (unsigned int)-1 && blkdat.good() && !fRequestShutdown)
             {
                 unsigned char pchData[65536];
                 do {
@@ -2068,7 +2068,7 @@ bool LoadExternalBlockFile(FILE* fileIn)
                     int nRead = fread(pchData, 1, sizeof(pchData), blkdat);
                     if (nRead <= 8)
                     {
-                        nPos = -1;
+                        nPos = (unsigned int)-1;
                         break;
                     }
                     void* nFind = memchr(pchData, pchMessageStart[0], nRead+1-sizeof(pchMessageStart));
@@ -2084,7 +2084,7 @@ bool LoadExternalBlockFile(FILE* fileIn)
                     else
                         nPos += sizeof(pchData) - sizeof(pchMessageStart) + 1;
                 } while(!fRequestShutdown);
-                if (nPos == -1)
+                if (nPos == (unsigned int)-1)
                     break;
                 fseek(blkdat, nPos, SEEK_SET);
                 unsigned int nSize;
diff --git a/src/main.h b/src/main.h
index 965100d6d4..194d9fdc66 100644
--- a/src/main.h
+++ b/src/main.h
@@ -36,7 +36,7 @@ static const int64 MAX_MONEY = 21000000 * COIN;
 inline bool MoneyRange(int64 nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); }
 static const int COINBASE_MATURITY = 100;
 // Threshold for nLockTime: below this value it is interpreted as block number, otherwise as UNIX timestamp.
-static const int LOCKTIME_THRESHOLD = 500000000; // Tue Nov  5 00:53:20 1985 UTC
+static const unsigned int LOCKTIME_THRESHOLD = 500000000; // Tue Nov  5 00:53:20 1985 UTC
 #ifdef USE_UPNP
 static const int fHaveUPnP = true;
 #else
diff --git a/src/makefile.linux-mingw b/src/makefile.linux-mingw
index 81934187e2..645f0a16e4 100644
--- a/src/makefile.linux-mingw
+++ b/src/makefile.linux-mingw
@@ -29,7 +29,7 @@ LIBS= \
 
 DEFS=-D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB
 DEBUGFLAGS=-g
-CFLAGS=-O2 -w -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
+CFLAGS=-O2 -w -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
 TESTDEFS = -DTEST_DATA_DIR=$(abspath test/data)
 
diff --git a/src/makefile.mingw b/src/makefile.mingw
index 917eb12fcf..bb6466954f 100644
--- a/src/makefile.mingw
+++ b/src/makefile.mingw
@@ -25,7 +25,7 @@ LIBS= \
 
 DEFS=-DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB
 DEBUGFLAGS=-g
-CFLAGS=-mthreads -O2 -w -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
+CFLAGS=-mthreads -O2 -w -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
 TESTDEFS = -DTEST_DATA_DIR=$(abspath test/data)
 
diff --git a/src/makefile.osx b/src/makefile.osx
index be95aab446..7582da0472 100644
--- a/src/makefile.osx
+++ b/src/makefile.osx
@@ -65,7 +65,7 @@ CFLAGS = -g
 endif
 
 # ppc doesn't work because we don't support big-endian
-CFLAGS += -Wextra -Wno-sign-compare -Wno-invalid-offsetof -Wformat-security \
+CFLAGS += -Wall -Wextra -Wformat -Wformat-security -Wno-unused-paramter \
     $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
 OBJS= \
diff --git a/src/makefile.unix b/src/makefile.unix
index 36860be299..53fb1f0b8d 100644
--- a/src/makefile.unix
+++ b/src/makefile.unix
@@ -82,9 +82,8 @@ LIBS+= \
 
 
 DEBUGFLAGS=-g
-CXXFLAGS=-O2
-xCXXFLAGS=-pthread -Wall -Wextra -Wno-invalid-offsetof -Wno-unused-parameter -Wformat -Wformat-security \
-    $(DEBUGFLAGS) $(DEFS) $(HARDENING) $(CXXFLAGS)
+CXXFLAGS=-O2 -pthread -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter \
+    $(DEBUGFLAGS) $(DEFS) $(HARDENING)
 
 OBJS= \
     obj/version.o \
@@ -121,26 +120,26 @@ version.cpp: obj/build.h
 DEFS += -DHAVE_BUILD_INFO
 
 obj/%.o: %.cpp
-	$(CXX) -c $(xCXXFLAGS) -MMD -o $@ $<
+	$(CXX) -c $(CXXFLAGS) -MMD -o $@ $<
 	@cp $(@:%.o=%.d) $(@:%.o=%.P); \
 	  sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
 	      -e '/^$$/ d' -e 's/$$/ :/' < $(@:%.o=%.d) >> $(@:%.o=%.P); \
 	  rm -f $(@:%.o=%.d)
 
 bitcoind: $(OBJS:obj/%=obj/%)
-	$(CXX) $(xCXXFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)
+	$(CXX) $(CXXFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)
 
 TESTOBJS := $(patsubst test/%.cpp,obj-test/%.o,$(wildcard test/*.cpp))
 
 obj-test/%.o: test/%.cpp
-	$(CXX) -c $(TESTDEFS) $(xCXXFLAGS) -MMD -o $@ $<
+	$(CXX) -c $(TESTDEFS) $(CXXFLAGS) -MMD -o $@ $<
 	@cp $(@:%.o=%.d) $(@:%.o=%.P); \
 	  sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
 	      -e '/^$$/ d' -e 's/$$/ :/' < $(@:%.o=%.d) >> $(@:%.o=%.P); \
 	  rm -f $(@:%.o=%.d)
 
 test_bitcoin: $(TESTOBJS) $(filter-out obj/init.o,$(OBJS:obj/%=obj/%))
-	$(CXX) $(xCXXFLAGS) -o $@ $(LIBPATHS) $^ -Wl,-B$(LMODE) -lboost_unit_test_framework $(LDFLAGS) $(LIBS)
+	$(CXX) $(CXXFLAGS) -o $@ $(LIBPATHS) $^ -Wl,-B$(LMODE) -lboost_unit_test_framework $(LDFLAGS) $(LIBS)
 
 clean:
 	-rm -f bitcoind test_bitcoin
diff --git a/src/netbase.cpp b/src/netbase.cpp
index 4fe3fb61da..48709dc5c6 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -208,9 +208,9 @@ bool static Socks5(string strDest, int port, SOCKET& hSocket)
     }
     char pszSocks5Init[] = "\5\1\0";
     char *pszSocks5 = pszSocks5Init;
-    int nSize = sizeof(pszSocks5Init);
+    ssize_t nSize = sizeof(pszSocks5Init);
 
-    int ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
+    ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
     if (ret != nSize)
     {
         closesocket(hSocket);
@@ -234,7 +234,7 @@ bool static Socks5(string strDest, int port, SOCKET& hSocket)
     strSocks5 += static_cast<char>((port >> 8) & 0xFF);
     strSocks5 += static_cast<char>((port >> 0) & 0xFF);
     ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
-    if (ret != strSocks5.size())
+    if (ret != (ssize_t)strSocks5.size())
     {
         closesocket(hSocket);
         return error("Error sending to proxy");
diff --git a/src/qt/transactionrecord.cpp b/src/qt/transactionrecord.cpp
index 90fc5b7da3..53cfb409ff 100644
--- a/src/qt/transactionrecord.cpp
+++ b/src/qt/transactionrecord.cpp
@@ -102,7 +102,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
                 //
                 int64 nTxFee = nDebit - wtx.GetValueOut();
 
-                for (int nOut = 0; nOut < wtx.vout.size(); nOut++)
+                for (unsigned int nOut = 0; nOut < wtx.vout.size(); nOut++)
                 {
                     const CTxOut& txout = wtx.vout[nOut];
                     TransactionRecord sub(hash, nTime);
diff --git a/src/test/base58_tests.cpp b/src/test/base58_tests.cpp
index d52ac74982..de4096cd39 100644
--- a/src/test/base58_tests.cpp
+++ b/src/test/base58_tests.cpp
@@ -67,7 +67,7 @@ const char *vstrOut[] = {
 
 BOOST_AUTO_TEST_CASE(base58_EncodeBase58)
 {
-    for (int i=0; i<sizeof(vstrIn)/sizeof(vstrIn[0]); i++)
+    for (unsigned int i=0; i<sizeof(vstrIn)/sizeof(vstrIn[0]); i++)
     {
         BOOST_CHECK_EQUAL(EncodeBase58(vstrIn[i].data, vstrIn[i].data + vstrIn[i].size), vstrOut[i]);
     }
@@ -76,7 +76,7 @@ BOOST_AUTO_TEST_CASE(base58_EncodeBase58)
 BOOST_AUTO_TEST_CASE(base58_DecodeBase58)
 {
     std::vector<unsigned char> result;
-    for (int i=0; i<sizeof(vstrIn)/sizeof(vstrIn[0]); i++)
+    for (unsigned int i=0; i<sizeof(vstrIn)/sizeof(vstrIn[0]); i++)
     {
         std::vector<unsigned char> expected(vstrIn[i].data, vstrIn[i].data + vstrIn[i].size);
         BOOST_CHECK(DecodeBase58(vstrOut[i], result));
diff --git a/src/test/base64_tests.cpp b/src/test/base64_tests.cpp
index fff30ef5eb..c5a053e2eb 100644
--- a/src/test/base64_tests.cpp
+++ b/src/test/base64_tests.cpp
@@ -10,7 +10,7 @@ BOOST_AUTO_TEST_CASE(base64_testvectors)
 {
     static const std::string vstrIn[]  = {"","f","fo","foo","foob","fooba","foobar"};
     static const std::string vstrOut[] = {"","Zg==","Zm8=","Zm9v","Zm9vYg==","Zm9vYmE=","Zm9vYmFy"};
-    for (int i=0; i<sizeof(vstrIn)/sizeof(vstrIn[0]); i++)
+    for (unsigned int i=0; i<sizeof(vstrIn)/sizeof(vstrIn[0]); i++)
     {
         std::string strEnc = EncodeBase64(vstrIn[i]);
         BOOST_CHECK(strEnc == vstrOut[i]);