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error: extended character ² is not valid in an identifier

JChMathae

Hello,

The ARM GNU toolchain does not like at all "extended characters" (like '²' or '℃') that are completely OK with other GNU toolcahins (for ARM or other architectures).

The problem lies at the C preprocessor 'cpp'...

How can that be?!

Thank you.

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    Hi there,

    I've managed to replicate your findings across releases: https://godbolt.org/z/4b85MW441 using `-pedantic -std=c2x` for C and `-pedantic -std=c++23` for C++. Interestingly, C fails from GCC13, wheareas C++ fails from GCC12: although with may just be a symptom of the C23/C++23 suppoert being Work In Progress across all these compiler releases.

    Are you using `-pedantic`? It seems to work if `-pedantic` is removed. Otherwise, what other command line options are you using?

    I don't know if this is expected behaviour for `-pedantic`, so I've raised https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112702 . Someone there will know if this is expected or not.

    You're right, seems to affect GCC regardless of the target backend being used (arm, aarch64, x86, etc.).

    Thanks,
    Stam

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  • 0

    Hi there,

    I've managed to replicate your findings across releases: https://godbolt.org/z/4b85MW441 using `-pedantic -std=c2x` for C and `-pedantic -std=c++23` for C++. Interestingly, C fails from GCC13, wheareas C++ fails from GCC12: although with may just be a symptom of the C23/C++23 suppoert being Work In Progress across all these compiler releases.

    Are you using `-pedantic`? It seems to work if `-pedantic` is removed. Otherwise, what other command line options are you using?

    I don't know if this is expected behaviour for `-pedantic`, so I've raised https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112702 . Someone there will know if this is expected or not.

    You're right, seems to affect GCC regardless of the target backend being used (arm, aarch64, x86, etc.).

    Thanks,
    Stam

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