I have a project with mixed C and C++ source files (more specifically, FreeRTOS). If I use C++03, Keil correctly determines the language based on extension (.cpp or .c) and everything is fine.
I want to use C++11 and set --cpp11 option in the Misc. controls block. Now Keil will compile all files as C++ source files and that means that some .c files won't compile - some C99 features won't work, such as designated initializers, and in some places C++ is more restrictive about implicit type conversions.
So my question is: is there a way to turn on C++11 only for .cpp files without changing compilation options for every such file separately?
I discovered the reverse way to do it - I can put --c99 option in Misc. controls for specific group in the project - and it will compile as C99. That seems really strange because --c99 option is already set at the project level.