https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109936
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
clang rejects both:
<source>:2:3: error: unexpected character <U+1F914>
X(🤔) // emojis work
^~
<source>:3:3: error: unexpected character <U+2260>
X(≠) // this "not equal" does NOT work!
^
GCC does reject both with -pedantic (in GCC 12+) though:
<source>:2:3: error: extended character 🤔 is not valid in an identifier
2 | X(🤔) // emojis work
| ^
<source>:3:3: error: extended character ≠ is not valid in an identifier
3 | X(≠) // this "not equal" does NOT work!
| ^
This changed from GCC 9 where GCC would accept both ...
