Fix warnings

cli/cppcheckexecutor.cpp

@@ -279,6 +279,11 @@ static void print_stacktrace(FILE* output, bool demangling, int maxdepth, bool l
         }
     }
 #undef ADDRESSDISPLAYLENGTH
+#else
+    UNUSED(output);
+    UNUSED(demangling);
+    UNUSED(maxdepth);
+    UNUSED(lowMem);
 #endif
 }
 
@@ -341,7 +346,10 @@ static void CppcheckSignalHandler(int signo, siginfo_t * info, void * context)
     if (uc) {
         type = (int)uc->uc_mcontext.gregs[REG_ERR] & 2;
     }
+#else
+    UNUSED(context);
 #endif
+
     const Signalmap_t::const_iterator it=listofsignals.find(signo);
     const char * const signame = (it==listofsignals.end()) ? "unknown" : it->second.c_str();
     bool printCallstack=true; // try to print a callstack?

lib/checkbufferoverrun.cpp

@@ -388,7 +388,7 @@ static bool checkMinSizes(const std::vector<Library::ArgumentChecks::MinSize> &m
                         parameters.push_back(nullptr);
                 }
                 const MathLib::biguint len = CheckBufferOverrun::countSprintfLength(formatstr, parameters);
-                if (len > arraySize + 2U)
+                if (len > arraySize + 2)
                     error = true;
             } else {
                 const Token *strtoken = argtok->getValueTokenMaxStrLength();

lib/utils.h

@@ -78,4 +78,6 @@ inline static const char *getOrdinalText(int i)
     return "th";
 }
 
+#define UNUSED(x) (void)(x)
+
 #endif