diff --git a/addons/test/misra/misra-test.c b/addons/test/misra/misra-test.c
index 7a4f777df..78f283136 100644
--- a/addons/test/misra/misra-test.c
+++ b/addons/test/misra/misra-test.c
@@ -1610,7 +1610,7 @@ static void misra_16_7(void) {
 }
 
 static void misra_17_1(void) {
-  va_list(); // 17.1
+  va_list(); // 17.1 17.7
   va_arg(); // 17.1
   va_start(); // 17.1
   va_end(); // 17.1
diff --git a/cli/filelister.cpp b/cli/filelister.cpp
index 05ddc9386..4499c479b 100644
--- a/cli/filelister.cpp
+++ b/cli/filelister.cpp
@@ -222,8 +222,8 @@ static std::string addFiles2(std::map<std::string, std::size_t> &files,
             std::string new_path;
             new_path.reserve(path.length() + 100);// prealloc some memory to avoid constant new/deletes in loop
 
-            while ((readdir_r(dir, &dir_result_buffer.entry, &dir_result) == 0) && (dir_result != nullptr)) {
 
+            while ((SUPPRESS_DEPRECATED_WARNING(readdir_r(dir, &dir_result_buffer.entry, &dir_result)) == 0) && (dir_result != nullptr)) {
                 if ((std::strcmp(dir_result->d_name, ".") == 0) ||
                     (std::strcmp(dir_result->d_name, "..") == 0))
                     continue;
diff --git a/cmake/compileroptions.cmake b/cmake/compileroptions.cmake
index cd8cf6b85..95ba5db5e 100644
--- a/cmake/compileroptions.cmake
+++ b/cmake/compileroptions.cmake
@@ -82,6 +82,9 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    add_compile_options_safe(-Wno-suggest-override) # TODO: enable when warnings are fixed in in tinyxml2
    add_compile_options_safe(-Wno-suggest-destructor-override) # TODO: enable when warnings are fixed in in tinyxml2
    add_compile_options_safe(-Wno-extra-semi-stmt) # TODO: enable when warnings are fixed in in tinyxml2
+   add_compile_options_safe(-Wno-implicitly-unsigned-literal)
+   add_compile_options_safe(-Wno-tautological-type-limit-compare)
+   add_compile_options_safe(-Wno-unused-member-function)
    add_compile_options(-Wno-disabled-macro-expansion)
 
    # warnings we are not interested in
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 01752bd7a..079b4871f 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -33,12 +33,12 @@ else()
 endif()
 
 add_library(lib_objs OBJECT ${srcs_lib} ${hdrs})
-target_include_directories(lib_objs PRIVATE ${PROJECT_SOURCE_DIR}/externals/)
+target_include_directories(lib_objs SYSTEM PRIVATE ${PROJECT_SOURCE_DIR}/externals/)
 if(USE_BUNDLED_TINYXML2)
-    target_include_directories(lib_objs PRIVATE ${PROJECT_SOURCE_DIR}/externals/tinyxml2/)
+    target_include_directories(lib_objs SYSTEM PRIVATE ${PROJECT_SOURCE_DIR}/externals/tinyxml2/)
 endif()
-target_include_directories(lib_objs PRIVATE ${PROJECT_SOURCE_DIR}/externals/picojson/)
-target_include_directories(lib_objs PRIVATE ${PROJECT_SOURCE_DIR}/externals/simplecpp/)
+target_include_directories(lib_objs SYSTEM PRIVATE ${PROJECT_SOURCE_DIR}/externals/picojson/)
+target_include_directories(lib_objs SYSTEM PRIVATE ${PROJECT_SOURCE_DIR}/externals/simplecpp/)
 if (HAVE_RULES)
     target_include_directories(lib_objs SYSTEM PRIVATE ${PCRE_INCLUDE})
 endif()
diff --git a/lib/calculate.h b/lib/calculate.h
index be0b6a9f9..084285c67 100644
--- a/lib/calculate.h
+++ b/lib/calculate.h
@@ -42,7 +42,7 @@ inline bool isEqual(float x, float y)
 template<class T>
 bool isZero(T x)
 {
-    return isEqual<T>(x, T(0));
+    return isEqual(x, T(0));
 }
 
 template<class R, class T>
diff --git a/lib/checkunusedvar.cpp b/lib/checkunusedvar.cpp
index 659235246..0118c482e 100644
--- a/lib/checkunusedvar.cpp
+++ b/lib/checkunusedvar.cpp
@@ -75,6 +75,7 @@ static bool isRaiiClass(const ValueType *valueType, bool cpp, bool defaultReturn
             return true;
         return defaultReturn;
 
+    case ValueType::Type::POD:
     case ValueType::Type::SMART_POINTER:
     case ValueType::Type::CONTAINER:
     case ValueType::Type::ITERATOR:
diff --git a/lib/config.h b/lib/config.h
index 2a78761c2..8cf43eee7 100644
--- a/lib/config.h
+++ b/lib/config.h
@@ -107,4 +107,16 @@ static const std::string emptyString;
 #error "No threading model defined"
 #endif
 
+#define STRINGISIZE(...) #__VA_ARGS__
+
+#ifdef __clang__
+#define SUPPRESS_WARNING(warning, ...)_Pragma("clang diagnostic push") _Pragma(STRINGISIZE(clang diagnostic ignored warning)) __VA_ARGS__ _Pragma("clang diagnostic pop")
+#define SUPPRESS_DEPRECATED_WARNING(...) SUPPRESS_WARNING("-Wdeprecated", __VA_ARGS__)
+#define SUPPRESS_FLOAT_EQUAL_WARNING(...) SUPPRESS_WARNING("-Wfloat-equal", __VA_ARGS__)
+#else
+#define SUPPRESS_DEPRECATED_WARNING(...) __VA_ARGS__
+#define SUPPRESS_FLOAT_EQUAL_WARNING(...) __VA_ARGS__
+#endif
+
+
 #endif // configH
diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index ef0737d38..57dc6d46c 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -6976,6 +6976,9 @@ std::string ValueType::dump() const
     case NONSTD:
         ret << "valueType-type=\"nonstd\"";
         break;
+    case POD:
+        ret << "valueType-type=\"pod\"";
+        break;
     case RECORD:
         ret << "valueType-type=\"record\"";
         break;
diff --git a/lib/valueflow.cpp b/lib/valueflow.cpp
index 70eb3b061..1ad4f9505 100644
--- a/lib/valueflow.cpp
+++ b/lib/valueflow.cpp
@@ -8248,6 +8248,10 @@ const char* ValueFlow::Value::toString(LifetimeScope lifetimeScope)
         return "Argument";
     case ValueFlow::Value::LifetimeScope::SubFunction:
         return "SubFunction";
+    case ValueFlow::Value::LifetimeScope::ThisPointer:
+        return "ThisPointer";
+    case ValueFlow::Value::LifetimeScope::ThisValue:
+        return "ThisValue";
     }
     return "";
 }