Tips for gcc compiler changes when using gcc 12.x.x.x-x (and higher?)

[fluxfocus]

I suppose the safe bet is to compile with the project's recommended compiler but some people might be doing some code experiments. To save anyone some time, there's a couple of small snags if compiling code with > gcc 12.

1. csrr and csrw psuedo opcodes have been deprecated by default after v12 i think. You can add the arch suffix to add them back e.g. ARCH=rv32e_zicsr (see src/makefile)

2. debug info strings seem to be compiled in by default. not sure if this is just for gcc versions > 12. It means that the data section (RAM) ends up bloating out by 30KB or something for what should be much smaller for the example code projects. Try adding -gtoggle as a compiler option to stop it from doing this if you don't have the ram space for them.

JD

[samsoniuk]

Thanks! I need update the tools here too!