https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68257
Bug ID: 68257
Summary: Reject empty abi_tag attribute on inline namespace
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sbergman at redhat dot com
Target Milestone: ---
Quoting <https://gcc.gnu.org/ml/gcc/2015-11/msg00017.html> "Re: abi_tag
questions" by Jonathan Wakely:
> On 4 November 2015 at 14:37, Stephan Bergmann <sberg...@redhat.com> wrote:
>> I have two questions regarding the abi_tag attribute (as documented at
>> <https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Attributes.html>):
[...]
>> 2 "The argument can be a list of strings of arbitrary length."
>>
>> Does that mean the list can be empty?
>>
>>> void f() __attribute__((__abi_tag__()));
>>
>> fails with "error: wrong number of arguments specified for ‘__abi_tag__’
>> attribute" while
>>
>>> inline namespace n __attribute__((__abi_tag__())) {}
>>
>> is accepted by recent trunk GCC (as well as older versions).
>
> That seems like a bug.
That would apparently have flagged the code fixed with
<https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=226022> "Fix abi_tag in
special modes."
