diff --git a/build/Makefile.gcc4 b/build/Makefile.gcc4
index 0b5f63c..ba4992c 100644
--- a/build/Makefile.gcc4
+++ b/build/Makefile.gcc4
@@ -10,7 +10,7 @@
 #--------------------------------------------------------------------------------
 
 include $(SCX_BRD)/build/Makefile.gcc3
-CXX_WARN_FLAGS+=-Wstrict-null-sentinel -Wmissing-include-dirs -Winit-self -Wextra 
+CXX_WARN_FLAGS+=-Wstrict-null-sentinel -Wmissing-include-dirs -Winit-self -Wextra
 
 ifeq ($(PF_DISTRO)$(PF_MAJOR),SUSE11)
     CXX_WARN_FLAGS+=-Wno-ignored-qualifiers 
diff --git a/build/Makefile.pf.Linux b/build/Makefile.pf.Linux
index 78a9edc..e2c8b7d 100644
--- a/build/Makefile.pf.Linux
+++ b/build/Makefile.pf.Linux
@@ -18,6 +18,9 @@ else
 	include Makefile.gcc4
 endif		
 
+# Needed for compat with Gcc 6 and beyond
+CXXFLAGS += -std=gnu++98
+
 # C++ 11 for IBM atomic support
 ifeq  ($(ARCH),ppc)
 	CXXFLAGS += -std=c++11 -D=linux
diff --git a/source/code/scxcorelib/pal/scxcondition.cpp b/source/code/scxcorelib/pal/scxcondition.cpp
index 8e87e57..f7311d6 100644
--- a/source/code/scxcorelib/pal/scxcondition.cpp
+++ b/source/code/scxcorelib/pal/scxcondition.cpp
@@ -84,6 +84,17 @@ namespace SCXCoreLib
     SCXCondition::~SCXCondition()
     {
 #if defined(SCX_UNIX)
+#if __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic warning "-Wc++11-compat"
+#endif        
+
+        // BUG ALERT!!!!
+        // Destructors are noexcept by default in C++11. Throwing an exception from a destructor or constructor
+        // is always poor practice because it leaves the object in an undefrined state, neither constructed or destructed.
+        // In this case, the best case would be a memory leak. The gcc 6 and after will treat this as an error and it will
+        // always abort the program.
+
         int err;
         if (0 != (err = pthread_cond_destroy(&m_cond)))
         {
@@ -94,6 +105,9 @@ namespace SCXCoreLib
         {
             throw SCXErrnoException(L"pthread_mutex_destroy() function call failed", err, SCXSRCLOCATION);
         }
+#if __GNUC__ >= 6
+#pragma GCC diagnostic pop
+#endif        
 #elif defined(WIN32)
                 DeleteCriticalSection(&m_lock);
 
diff --git a/source/code/scxcorelib/pal/scxdirectoryinfo.cpp b/source/code/scxcorelib/pal/scxdirectoryinfo.cpp
index f9ae686..0957644 100644
--- a/source/code/scxcorelib/pal/scxdirectoryinfo.cpp
+++ b/source/code/scxcorelib/pal/scxdirectoryinfo.cpp
@@ -481,7 +481,15 @@ namespace
 #if defined(sun)
             while (NULL != (dentp = readdir_r(dirp, currentDir))) {
 #else
+#if (__GNUC__ >= 6 )
+#pragma GCC diagnostic push
+#pragma GCC diagnostic warning "-Wdeprecated-declarations"
+#endif
+            // readdir_c is deprecated as of POSIX 1.2008 but is still supported and not simple to implement the recommended usage. Make a warning for now
             while ((0 == readdir_r(dirp, currentDir, &dentp)) && NULL != dentp) {
+#if (__GNUC__ >= 6)
+#pragma GCC diagnostic pop
+#endif
 #endif
                 bool isdir = false;                         // Is this a directory entry
                 SCXCoreLib::SCXFileSystem::SCXStatStruct* pStat = 0;
diff --git a/source/code/scxcorelib/util/scxmath.cpp b/source/code/scxcorelib/util/scxmath.cpp
index 0a742c9..4c3b5e6 100644
--- a/source/code/scxcorelib/util/scxmath.cpp
+++ b/source/code/scxcorelib/util/scxmath.cpp
@@ -144,7 +144,7 @@ namespace SCXCoreLib
     scxlong RoundToScxLong(double value) 
     {
         double roundedValue = Round(value);
-        if (cMinScxLong <= roundedValue && roundedValue <= cMaxScxLong) {
+        if ((double)cMinScxLong <= roundedValue && roundedValue <= (double)cMaxScxLong) {
             return static_cast<scxlong> (roundedValue);
         } else {
             throw SCXInvalidArgumentException(L"value", L"Value of double outside the range of long",