[Bug c/55965] gcc -std=c99 emits code for inline even without extern

[jeremyhu at macports dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55965

--- Comment #3 from Jeremy Huddleston Sequoia <jeremyhu at macports dot org> ---
On OSX, the _isalnum symbol corresponds to the isalnum() function and the
__isalnum symbol would correspond to the _isalnum() function.  It is emitting
the _isalnum symbol (for isalnum()) but not the __isalnum symbol (because
_isalnum() is being inlined).

I suspect you seeing an isalnum symbol is because you're on a different
platform that does not _-prefix.