From Wojciech Lewandowski, "I have restored MSVC disabled warnings in osg/Export. Difference is they are now disabled only when OSG_DISABLE_MSVC_WARNINGS macro is defined. This macro is set through CMake options and autogenerated in osg/Config. Simon suggested that it would be cool if we had more control over selected warnings. I tried to learn how to make selection of individual warning numbers possible, but had to gave up as my cmake skills were not sufficient. The only way I saw this possible would be adding one define for each MSVC warning number. But many definitions seemed too be to much clutter for osg/Config file so I rejected thar idea. For this it would be cool if autogenerated Config entries could more powerful than simple #define/#undef flags. Maybe Cmake gurus know how to do it.

I have not reverted added Compiler options. I assume that one may want to have warnings enabled for the application but may not want to see them while OSG libraries and examples compile.

Modified files:

osg/Export   - now explicitly includes osg/Config to make sure OSG_DISABLE_MSVC_WARNINGS is read
osg/Config.in  - declares OSG_DISABLE_MSVC_WARNINGS flag to be added to autogenerated osg/Config
CMakeLists.txt - declares OSG_DISABLE_MSVC_WARNINGS as option with default ON setting
"

CMakeLists.txt

@@ -271,6 +271,9 @@ MARK_AS_ADVANCED(OSG_USE_FLOAT_BOUNDINGBOX)
 OPTION(OSG_USE_UTF8_FILENAME "Set to ON to use a UTF8 locale for filenames instead of the default locale." OFF)
 MARK_AS_ADVANCED(OSG_USE_UTF8_FILENAME)
 
+OPTION(OSG_DISABLE_MSVC_WARNINGS "Set to OFF to not disable MSVC wartnings genertated by OSG headers." ON)
+MARK_AS_ADVANCED(OSG_DISABLE_MSVC_WARNINGS)
+
 OPTION(OSG_USE_REF_PTR_IMPLICIT_OUTPUT_CONVERSION "Set to ON to use the ref_ptr<> T* operator() output conversion. " ON)
 
 ################################################################################

include/osg/Export

@@ -14,11 +14,24 @@
 #ifndef OSG_EXPORT_
 #define OSG_EXPORT_ 1
 
+#include<osg/Config>
 // define USE_DEPRECATED_API is used to include in API which is being fazed out
 // if you can compile your apps with this turned off you are
 // well placed for compatibility with future versions.
 #define USE_DEPRECATED_API
 
+// disable VisualStudio warnings 
+#if defined(_MSC_VER) && defined(OSG_DISABLE_MSVC_WARNINGS)
+    #pragma warning( disable : 4244 )
+    #pragma warning( disable : 4251 )
+    #pragma warning( disable : 4267 )
+    #pragma warning( disable : 4275 )
+    #pragma warning( disable : 4290 )
+    #pragma warning( disable : 4786 )
+    #pragma warning( disable : 4305 )
+    #pragma warning( disable : 4996 )
+#endif
+
 #if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__) || defined( __BCPLUSPLUS__)  || defined( __MWERKS__)
     #  if defined( OSG_LIBRARY_STATIC )
     #    define OSG_EXPORT
@@ -29,7 +42,7 @@
     #  endif
 #else
     #  define OSG_EXPORT
-#endif  
+#endif
 
 // set up define for whether member templates are supported by VisualStudio compilers.
 #ifdef _MSC_VER

src/osg/Config.in

@@ -29,5 +29,7 @@
 #cmakedefine OSG_USE_FLOAT_BOUNDINGBOX
 #cmakedefine OSG_USE_REF_PTR_IMPLICIT_OUTPUT_CONVERSION
 #cmakedefine OSG_USE_UTF8_FILENAME
+#cmakedefine OSG_DISABLE_MSVC_WARNINGS
+
 
 #endif