I am trying to develop a C++ application for the RTEMS RTOS but I am having trouble getting debugging to work. They have a basic LED blinky example written in C that I am able to debug. However, converting this to C++ causes gdb to not be able to find the source file.

If I connect gdb to the C app and run info sources, I can see my init.c file right at the top followed by all the RTEMS sources. Repeating this for the C++ app, there is no mention of init.cpp. Using objdump on the exe/ELF files, I can see in debug_info and debug_str the path to init.c. But in the C++ app, there is no mention of the path to init.cpp.

The C app and the C++ app are nested under the same top level directory and use the same wscript file to configure the compiler. Both apps are being compiled with -Og and -g. What would prevent the source path from being written to the debug section of the ELF file?