Re: [Libguestfs] [PATCH nbdkit 1/2] include: Fix NBDKIT_HANDLE_NOT_NEEDED for C90 compilers.
On Fri, Jan 18, 2019 at 09:08:27AM -0600, Eric Blake wrote:
>> errno is often implemented as a dereference of a function
call in order
>> to get thread-safe semantics; for example, your patch produces
>> '&(*__errno_location())' on glibc. That should be okay (especially
>> since it silenced the warning).
Come to think of it, I got mixed up about your point. This isn't a
problem because __errno_location() returns a pointer to an integer
which is then dereferenced, so the fact there is a function is
irrelevant.
Thanks for the other analysis about available variables.
I'll stick to errno.
Rich.
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