diff --git a/gui/applicationlist.cpp b/gui/applicationlist.cpp
index 022efa0ef..38414fdf6 100644
--- a/gui/applicationlist.cpp
+++ b/gui/applicationlist.cpp
@@ -198,6 +198,7 @@ bool ApplicationList::checkAndAddApplication(const QString& appPath, const QStri
     return false;
 }
 
+#ifdef _WIN32
 bool ApplicationList::findDefaultWindowsEditor()
 {
     bool foundOne = false;
@@ -264,3 +265,4 @@ bool ApplicationList::findDefaultWindowsEditor()
 
     return foundOne;
 }
+#endif
diff --git a/gui/applicationlist.h b/gui/applicationlist.h
index d2249e2ab..189ea62aa 100644
--- a/gui/applicationlist.h
+++ b/gui/applicationlist.h
@@ -108,11 +108,13 @@ protected:
      */
     void clear();
 
+#ifdef _WIN32
     /**
      * @brief Find editor used by default in Windows.
      * Check if Notepad++ is installed and use it. If not, use Notepad.
      */
     bool findDefaultWindowsEditor();
+#endif
 
 private:
 
diff --git a/gui/mainwindow.h b/gui/mainwindow.h
index 4710de816..d10836c0d 100644
--- a/gui/mainwindow.h
+++ b/gui/mainwindow.h
@@ -268,7 +268,7 @@ private:
     void setLanguage(const QString &code);
 
     /** @brief Event coming when application is about to close. */
-    virtual void closeEvent(QCloseEvent *event);
+    void closeEvent(QCloseEvent *event) override;
 
     /**
      * @brief Helper function to toggle all show error menu items
diff --git a/gui/resultstree.h b/gui/resultstree.h
index 0e32f4944..12114485d 100644
--- a/gui/resultstree.h
+++ b/gui/resultstree.h
@@ -177,7 +177,7 @@ public:
      */
     ShowTypes mShowSeverities;
 
-    virtual void keyPressEvent(QKeyEvent *event);
+    void keyPressEvent(QKeyEvent *event) override;
 
 signals:
     /**
@@ -294,7 +294,7 @@ protected slots:
      * @param current Model index to specify new selected item.
      * @param previous Model index to specify previous selected item.
      */
-    virtual void currentChanged(const QModelIndex &current, const QModelIndex &previous);
+    void currentChanged(const QModelIndex &current, const QModelIndex &previous) override;
 
 protected:
 
@@ -365,7 +365,7 @@ protected:
      *
      * @param e Event
      */
-    void contextMenuEvent(QContextMenuEvent * e);
+    void contextMenuEvent(QContextMenuEvent * e) override;
 
     /**
      * @brief Add a new error item beneath a file or a backtrace item beneath an error
diff --git a/lib/astutils.cpp b/lib/astutils.cpp
index c87932321..b5da9227a 100644
--- a/lib/astutils.cpp
+++ b/lib/astutils.cpp
@@ -3306,14 +3306,6 @@ bool FwdAnalysis::unusedValue(const Token *expr, const Token *startToken, const
     return (result.type == FwdAnalysis::Result::Type::NONE || result.type == FwdAnalysis::Result::Type::RETURN) && !possiblyAliased(expr, startToken);
 }
 
-std::vector<FwdAnalysis::KnownAndToken> FwdAnalysis::valueFlow(const Token *expr, const Token *startToken, const Token *endToken)
-{
-    mWhat = What::ValueFlow;
-    mValueFlowKnown = true;
-    check(expr, startToken, endToken);
-    return mValueFlow;
-}
-
 bool FwdAnalysis::possiblyAliased(const Token *expr, const Token *startToken) const
 {
     if (expr->isUnaryOp("*"))
diff --git a/lib/astutils.h b/lib/astutils.h
index 284eed928..2a13a7386 100644
--- a/lib/astutils.h
+++ b/lib/astutils.h
@@ -363,8 +363,6 @@ public:
         const Token *token;
     };
 
-    std::vector<KnownAndToken> valueFlow(const Token *expr, const Token *startToken, const Token *endToken);
-
     /** Is there some possible alias for given expression */
     bool possiblyAliased(const Token *expr, const Token *startToken) const;
 
diff --git a/lib/checkmemoryleak.cpp b/lib/checkmemoryleak.cpp
index 2245dee99..158bcac04 100644
--- a/lib/checkmemoryleak.cpp
+++ b/lib/checkmemoryleak.cpp
@@ -408,57 +408,6 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::functionReturnType(const Function* f
 }
 
 
-const char *CheckMemoryLeak::functionArgAlloc(const Function *func, nonneg int targetpar, AllocType &allocType) const
-{
-    allocType = No;
-
-    if (!func || !func->functionScope)
-        return "";
-
-    if (!Token::simpleMatch(func->retDef, "void"))
-        return "";
-
-    std::list<Variable>::const_iterator arg = func->argumentList.begin();
-    for (; arg != func->argumentList.end(); ++arg) {
-        if (arg->index() == targetpar-1)
-            break;
-    }
-    if (arg == func->argumentList.end())
-        return "";
-
-    // Is **
-    if (!arg->isPointer())
-        return "";
-    const Token* tok = arg->typeEndToken();
-    tok = tok->previous();
-    if (tok->str() != "*")
-        return "";
-
-    // Check if pointer is allocated.
-    bool realloc = false;
-    for (tok = func->functionScope->bodyStart; tok && tok != func->functionScope->bodyEnd; tok = tok->next()) {
-        if (tok->varId() == arg->declarationId()) {
-            if (Token::Match(tok->tokAt(-3), "free ( * %name% )")) {
-                realloc = true;
-                allocType = No;
-            } else if (Token::Match(tok->previous(), "* %name% =")) {
-                allocType = getAllocationType(tok->tokAt(2), arg->declarationId());
-                if (allocType != No) {
-                    if (realloc)
-                        return "realloc";
-                    return "alloc";
-                }
-            } else {
-                // unhandled variable usage: bailout
-                return "";
-            }
-        }
-    }
-
-    return "";
-}
-
-
 static bool notvar(const Token *tok, nonneg int varid)
 {
     if (!tok)
diff --git a/lib/checkmemoryleak.h b/lib/checkmemoryleak.h
index a61f3a598..6b3795ec8 100644
--- a/lib/checkmemoryleak.h
+++ b/lib/checkmemoryleak.h
@@ -145,9 +145,6 @@ public:
 
     /** What type of allocated memory does the given function return? */
     AllocType functionReturnType(const Function* func, std::list<const Function*> *callstack = nullptr) const;
-
-    /** Function allocates pointed-to argument (a la asprintf)? */
-    const char *functionArgAlloc(const Function *func, nonneg int targetpar, AllocType &allocType) const;
 };
 
 /// @}
diff --git a/lib/checkstl.cpp b/lib/checkstl.cpp
index 46ad2057a..313f15c38 100644
--- a/lib/checkstl.cpp
+++ b/lib/checkstl.cpp
@@ -2381,31 +2381,6 @@ void CheckStl::dereferenceInvalidIteratorError(const Token* deref, const std::st
                 "Possible dereference of an invalid iterator: $symbol. Make sure to check that the iterator is valid before dereferencing it - not after.", CWE825, Certainty::normal);
 }
 
-
-void CheckStl::readingEmptyStlContainer2()
-{
-    for (const Scope *function : mTokenizer->getSymbolDatabase()->functionScopes) {
-        for (const Token *tok = function->bodyStart; tok != function->bodyEnd; tok = tok->next()) {
-            if (!tok->isName() || !tok->valueType())
-                continue;
-            const Library::Container *container = tok->valueType()->container;
-            if (!container)
-                continue;
-            const ValueFlow::Value *value = tok->getContainerSizeValue(0);
-            if (!value)
-                continue;
-            if (value->isInconclusive() && !mSettings->certainty.isEnabled(Certainty::inconclusive))
-                continue;
-            if (!value->errorSeverity() && !mSettings->severity.isEnabled(Severity::warning))
-                continue;
-            if (Token::Match(tok, "%name% . %name% (")) {
-                if (container->getYield(tok->strAt(2)) == Library::Container::Yield::ITEM)
-                    readingEmptyStlContainerError(tok,value);
-            }
-        }
-    }
-}
-
 void CheckStl::readingEmptyStlContainerError(const Token *tok, const ValueFlow::Value *value)
 {
     const std::string varname = tok ? tok->str() : std::string("var");
diff --git a/lib/checkstl.h b/lib/checkstl.h
index c26c74f2b..33b40e3b8 100644
--- a/lib/checkstl.h
+++ b/lib/checkstl.h
@@ -178,9 +178,6 @@ public:
      */
     void dereferenceErasedError(const Token* erased, const Token* deref, const std::string& itername, bool inconclusive);
 
-    /** @brief Reading from empty stl container (using valueflow) */
-    void readingEmptyStlContainer2();
-
     /** @brief Look for loops that can replaced with std algorithms */
     void useStlAlgorithm();
 
diff --git a/lib/importproject.cpp b/lib/importproject.cpp
index 79e3ced69..68036e197 100644
--- a/lib/importproject.cpp
+++ b/lib/importproject.cpp
@@ -76,16 +76,6 @@ void ImportProject::ignoreOtherConfigs(const std::string &cfg)
     }
 }
 
-void ImportProject::ignoreOtherPlatforms(cppcheck::Platform::PlatformType platformType)
-{
-    for (std::list<FileSettings>::iterator it = fileSettings.begin(); it != fileSettings.end();) {
-        if (it->platformType != cppcheck::Platform::Unspecified && it->platformType != platformType)
-            fileSettings.erase(it++);
-        else
-            ++it;
-    }
-}
-
 void ImportProject::FileSettings::setDefines(std::string defs)
 {
     while (defs.find(";%(") != std::string::npos) {
diff --git a/lib/importproject.h b/lib/importproject.h
index 6a6fa4173..faf63fa40 100644
--- a/lib/importproject.h
+++ b/lib/importproject.h
@@ -103,7 +103,6 @@ public:
 
     void ignorePaths(const std::vector<std::string> &ipaths);
     void ignoreOtherConfigs(const std::string &cfg);
-    void ignoreOtherPlatforms(cppcheck::Platform::PlatformType platformType);
 
     Type import(const std::string &filename, Settings *settings=nullptr);
 protected:
diff --git a/lib/preprocessor.cpp b/lib/preprocessor.cpp
index 79b5e3e6b..a8223bf91 100644
--- a/lib/preprocessor.cpp
+++ b/lib/preprocessor.cpp
@@ -559,36 +559,6 @@ void Preprocessor::preprocess(std::istream &istr, std::map<std::string, std::str
     }
 }
 
-std::string Preprocessor::removeSpaceNearNL(const std::string &str)
-{
-    std::string tmp;
-    char prev = '\n'; // treat start of file as newline
-    for (std::size_t i = 0; i < str.size(); i++) {
-        if (str[i] == ' ' &&
-            (prev == '\n' ||
-             i + 1 >= str.size() || // treat end of file as newline
-             str[i+1] == '\n'
-            )
-            ) {
-            // Ignore space that has new line in either side of it
-        } else {
-            tmp.append(1, str[i]);
-            prev = str[i];
-        }
-    }
-
-    return tmp;
-}
-
-void Preprocessor::preprocessWhitespaces(std::string &processedFile)
-{
-    // Replace all tabs with spaces..
-    std::replace(processedFile.begin(), processedFile.end(), '\t', ' ');
-
-    // Remove space characters that are after or before new line character
-    processedFile = removeSpaceNearNL(processedFile);
-}
-
 void Preprocessor::preprocess(std::istream &srcCodeStream, std::string &processedFile, std::list<std::string> &resultConfigurations, const std::string &filename, const std::list<std::string> &includePaths)
 {
     (void)includePaths;
diff --git a/lib/preprocessor.h b/lib/preprocessor.h
index 59f759b4c..3a8d8e330 100644
--- a/lib/preprocessor.h
+++ b/lib/preprocessor.h
@@ -154,12 +154,6 @@ public:
      */
     std::string getcode(const std::string &filedata, const std::string &cfg, const std::string &filename);
 
-    /**
-     * preprocess all whitespaces
-     * @param processedFile The data to be processed
-     */
-    static void preprocessWhitespaces(std::string &processedFile);
-
     /**
      * make sure empty configuration macros are not used in code. the given code must be a single configuration
      * @param cfg configuration
@@ -184,14 +178,6 @@ private:
 
     static void simplifyPragmaAsmPrivate(simplecpp::TokenList *tokenList);
 
-    /**
-     * Remove space that has new line character on left or right side of it.
-     *
-     * @param str The string to be converted
-     * @return The string where space characters have been removed.
-     */
-    static std::string removeSpaceNearNL(const std::string &str);
-
 public:
 
 
diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index cc8e86e67..7b769ff58 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -1840,6 +1840,7 @@ void SymbolDatabase::validate() const
     if (mSettings->debugwarnings) {
         validateExecutableScopes();
     }
+    // TODO
     //validateVariables();
 }
 
@@ -5329,17 +5330,6 @@ const Scope *SymbolDatabase::findScopeByName(const std::string& name) const
 
 //---------------------------------------------------------------------------
 
-Scope *Scope::findInNestedList(const std::string & name)
-{
-    for (Scope *scope: nestedList) {
-        if (scope->className == name)
-            return scope;
-    }
-    return nullptr;
-}
-
-//---------------------------------------------------------------------------
-
 const Scope *Scope::findRecordInNestedList(const std::string & name) const
 {
     for (const Scope* scope: nestedList) {
diff --git a/lib/symboldatabase.h b/lib/symboldatabase.h
index ad02e15b3..923a5badf 100644
--- a/lib/symboldatabase.h
+++ b/lib/symboldatabase.h
@@ -1128,12 +1128,6 @@ public:
      */
     const Function *findFunction(const Token *tok, bool requireConst=false) const;
 
-    /**
-     * @brief find if name is in nested list
-     * @param name name of nested scope
-     */
-    Scope *findInNestedList(const std::string & name);
-
     const Scope *findRecordInNestedList(const std::string & name) const;
     Scope *findRecordInNestedList(const std::string & name) {
         return const_cast<Scope *>(const_cast<const Scope *>(this)->findRecordInNestedList(name));
diff --git a/lib/token.cpp b/lib/token.cpp
index a36a4a64f..ea072b08b 100644
--- a/lib/token.cpp
+++ b/lib/token.cpp
@@ -1915,46 +1915,6 @@ const Token *Token::getValueTokenMaxStrLength() const
     return ret;
 }
 
-static const Scope *getfunctionscope(const Scope *s)
-{
-    while (s && s->type != Scope::eFunction)
-        s = s->nestedIn;
-    return s;
-}
-
-const Token *Token::getValueTokenDeadPointer() const
-{
-    const Scope * const functionscope = getfunctionscope(this->scope());
-
-    std::list<ValueFlow::Value>::const_iterator it;
-    for (it = values().begin(); it != values().end(); ++it) {
-        // Is this a pointer alias?
-        if (!it->isTokValue() || (it->tokvalue && it->tokvalue->str() != "&"))
-            continue;
-        // Get variable
-        const Token *vartok = it->tokvalue->astOperand1();
-        if (!vartok || !vartok->isName() || !vartok->variable())
-            continue;
-        const Variable * const var = vartok->variable();
-        if (var->isStatic() || var->isReference())
-            continue;
-        if (!var->scope())
-            return nullptr; // #6804
-        if (var->scope()->type == Scope::eUnion && var->scope()->nestedIn == this->scope())
-            continue;
-        // variable must be in same function (not in subfunction)
-        if (functionscope != getfunctionscope(var->scope()))
-            continue;
-        // Is variable defined in this scope or upper scope?
-        const Scope *s = this->scope();
-        while ((s != nullptr) && (s != var->scope()))
-            s = s->nestedIn;
-        if (!s)
-            return it->tokvalue;
-    }
-    return nullptr;
-}
-
 static bool isAdjacent(const ValueFlow::Value& x, const ValueFlow::Value& y)
 {
     if (x.bound != ValueFlow::Value::Bound::Point && x.bound == y.bound)
diff --git a/lib/token.h b/lib/token.h
index 23b16c871..ba23cba17 100644
--- a/lib/token.h
+++ b/lib/token.h
@@ -863,7 +863,7 @@ public:
     void printOut(const char *title, const std::vector<std::string> &fileNames) const;
 
     /**
-     * print out tokens
+     * print out tokens - used for debugging
      */
     void printLines(int lines=5) const;
 
@@ -1171,8 +1171,6 @@ public:
     const Token *getValueTokenMaxStrLength() const;
     const Token *getValueTokenMinStrSize(const Settings *settings) const;
 
-    const Token *getValueTokenDeadPointer() const;
-
     /** Add token value. Return true if value is added. */
     bool addValue(const ValueFlow::Value &value);
 
diff --git a/lib/valueflow.cpp b/lib/valueflow.cpp
index 12c56d669..d8a4b2260 100644
--- a/lib/valueflow.cpp
+++ b/lib/valueflow.cpp
@@ -1966,9 +1966,6 @@ struct ValueFlowAnalyzer : Analyzer {
 
     virtual ProgramState getProgramState() const = 0;
 
-    virtual const ValueType* getValueType(const Token*) const {
-        return nullptr;
-    }
     virtual int getIndirect(const Token* tok) const {
         const ValueFlow::Value* value = getValue(tok);
         if (value)
@@ -2640,10 +2637,6 @@ struct ExpressionAnalyzer : SingleValueFlowAnalyzer {
             setupExprVarIds(val.tokvalue);
     }
 
-    virtual const ValueType* getValueType(const Token*) const OVERRIDE {
-        return expr->valueType();
-    }
-
     static bool nonLocal(const Variable* var, bool deref) {
         return !var || (!var->isLocal() && !var->isArgument()) || (deref && var->isArgument() && var->isPointer()) ||
                var->isStatic() || var->isReference() || var->isExtern();
diff --git a/test/testcmdlineparser.cpp b/test/testcmdlineparser.cpp
index 546c9dd0e..eb56b123d 100644
--- a/test/testcmdlineparser.cpp
+++ b/test/testcmdlineparser.cpp
@@ -130,6 +130,7 @@ private:
         TEST_CASE(errorlistverbose2);
         TEST_CASE(ignorepathsnopath);
 
+        // TODO
         // Disabling these tests since they use relative paths to the
         // testrunner executable.
         //TEST_CASE(ignorepaths1);
@@ -974,8 +975,8 @@ private:
             ASSERT_EQUALS("src/", parser.getIgnoredPaths()[0]);
             ASSERT_EQUALS("module/", parser.getIgnoredPaths()[1]);
         }
-     */
-    void ignorepaths4() {
+
+       void ignorepaths4() {
         REDIRECT;
         const char * const argv[] = {"cppcheck", "-i", "src", "-i", "module", "file.cpp"};
         CmdLineParser parser(&settings);
@@ -983,8 +984,8 @@ private:
         ASSERT_EQUALS(2, parser.getIgnoredPaths().size());
         ASSERT_EQUALS("src/", parser.getIgnoredPaths()[0]);
         ASSERT_EQUALS("module/", parser.getIgnoredPaths()[1]);
-    }
-    /*
+       }
+
         void ignorefilepaths1() {
             REDIRECT;
             const char * const argv[] = {"cppcheck", "-ifoo.cpp", "file.cpp"};
@@ -993,15 +994,16 @@ private:
             ASSERT_EQUALS(1, parser.getIgnoredPaths().size());
             ASSERT_EQUALS("foo.cpp", parser.getIgnoredPaths()[0]);
         }
-     */
-    void ignorefilepaths2() {
+
+       void ignorefilepaths2() {
         REDIRECT;
         const char * const argv[] = {"cppcheck", "-isrc/foo.cpp", "file.cpp"};
         CmdLineParser parser(&settings);
         ASSERT(parser.parseFromArgs(3, argv));
         ASSERT_EQUALS(1, parser.getIgnoredPaths().size());
         ASSERT_EQUALS("src/foo.cpp", parser.getIgnoredPaths()[0]);
-    }
+       }
+     */
 
     void checkconfig() {
         REDIRECT;