Memory usage for RX processor with GCC

When I opened the Memory Usage tab, I get this message:

GCC library projects (RL, RX, RZ, RE) and Synergy library projects don't have library list file.

The map file is generated by the linker. I've opened this project in e2studio 2020, but when I open this project in e2studio 7, I get the same message.
Building with toolchain or has the same result.
I've also an old project with also an RX231 processor, but that works fine.

How can I make this option working?