https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110558
--- Comment #2 from provisorisch at online dot de ---
Not quite, but you will run into bug 80753 if the header file does not exist:
The second #include will not cause an error in that case.
The first #include however will cause an error as expect
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110558
Bug ID: 110558
Summary: __has_include argument expansion results in unexpected
filename
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal