To target a specific source language with the compiler:

If you do not specify any of these options, the compiler determines the source language from the extension of your source files. However, if you specify multiple source files for a single compiler invocation that contain different source languages, then specify one of these compiler options. For example, to compile f1.c and f2.cpp for ISO standard C++:

armcc --cpp f1.c f2.cpp

If you specify any assembly language sources, then the compiler invokes the assembler to assemble these source files.

You can also use the armcpp command to invoke the C++ compiler.