Hello, Below is a list of files, that contain: #if defined(__GNUC__) #pragma GCC system_header #endif which causes a warning on my TI compiler. E:\boost\include\boost-1_50_0\boost\exception\all.hpp E:\boost\include\boost-1_50_0\boost\exception\current_exception_cast.hpp E:\boost\include\boost-1_50_0\boost\exception\detail\error_info_impl.hpp E:\boost\include\boost-1_50_0\boost\exception\detail\exception_ptr.hpp E:\boost\include\boost-1_50_0\boost\exception\detail\is_output_streamable.hpp E:\boost\include\boost-1_50_0\boost\exception\detail\object_hex_dump.hpp E:\boost\include\boost-1_50_0\boost\exception\detail\type_info.hpp E:\boost\include\boost-1_50_0\boost\exception\diagnostic_information.hpp E:\boost\include\boost-1_50_0\boost\exception\errinfo_errno.hpp E:\boost\include\boost-1_50_0\boost\exception\exception.hpp E:\boost\include\boost-1_50_0\boost\exception\get_error_info.hpp E:\boost\include\boost-1_50_0\boost\exception\info.hpp E:\boost\include\boost-1_50_0\boost\exception\info_tuple.hpp E:\boost\include\boost-1_50_0\boost\exception\to_string.hpp E:\boost\include\boost-1_50_0\boost\exception\to_string_stub.hpp E:\boost\include\boost-1_50_0\boost\throw_exception.hpp E:\boost\include\boost-1_50_0\boost\type_traits\is_virtual_base_of.hpp In other files, i.e. boost\integer.hpp, I've found this #pragma guarded against __GNUC__ >= 4: #if defined(__GNUC__) && (__GNUC__ >= 4) #pragma GCC system_header #endif which doesn't cause a warning on my compiler, because it defines __GNUC__ to 3. Could this be fixed in the files on the list above, or are there some __GNUC__ 3 compilers, that need this pragma to be enabled? Regards, Kris