[Bug preprocessor/80071] __LINE__ is expanded incorrectly

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80071

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I should mention: the GCC __COUNTER__ macro can be used to generate a unique
integer each time it's expanded.