Re: BUG #18026: compile error / fe-auth.c:807:64: error: 'CHAR_BIT' undeclared (first use in this function)

PG Bug reporting form  writes:
> fe-auth.c: In function 'check_expected_areq':
> fe-auth.c:807:64: error: 'CHAR_BIT' undeclared (first use in this
> function)

Hmm.  This problem seems straightforward enough to fix, but what I
don't understand is why we've not seen it already.  We do have a
buildfarm animal running on Solaris 11.4 [1], and it's not unhappy.
Are you using any unusual build options or toolchain?

			regards, tom lane

[1] https://buildfarm.postgresql.org/cgi-bin/show_history.pl?nm=margay&br=HEAD