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."