On Thu, 24 Aug 2023 at 06:55, Markus Armbruster <arm...@redhat.com> wrote: > > Liu Jaloo <liu.ja...@gmail.com> writes: > > > What's the difference between "__attribute__((constructor))" and > > "__attribute__((__constructor__))" in qemu source? > > Reading the fine manual helps: > > You may optionally specify attribute names with ‘__’ preceding and > following the name. This allows you to use them in header files > without being concerned about a possible macro of the same name. For > example, you may use the attribute name __noreturn__ instead of > noreturn.
As usual in the QEMU sources, we are not particularly consistent about using one version compared to the other. However we mostly use the "__attribute__((foo))" form rather than "__attribute__((__foo__))" so if you're writing new code then prefer the former. We also have a handful of uses of "__attribute((foo))" and "__attribute((__foo__))". Definitely don't add more of those :-) thanks -- PMM
