On 10/14/20 2:09 PM, Martin Sebor via Gcc-patches wrote: > The attribute access implicitly added to function declarations > with VLA parameters includes the top-level VLA bounds chained > together similarly to other attribute arguments. However, > since attribute access is limited to at most 3 arguments > including the mode, a function that takes three or more VLA > arguments triggers an error from decl_attributes complaining > about excess arguments. > > The attached patch gets around it by wrapping the VLA bound > chain in a list. It doesn't feel like the most elegant solution > but it's simple and I couldn't think of anything better. If no > one comes up with a suggestion for a better way of dealing with > this I'll commit the fix sometime tomorrow as obvious. > > Martin > > > gcc-97413.diff > > PR c/97413 - bogus error on function declaration with many VLA arguments > > gcc/ChangeLog: > > PR c/97413 > * attribs.c (init_attr_rdwr_indices): Unwrap extra list layer. > > gcc/c-family/ChangeLog: > > PR c/97413 > * c-attribs.c (build_attr_access_from_parms): Wrap chain of VLA > bounds in an extra list. > > gcc/testsuite/ChangeLog: > > PR c/97413 > * gcc.dg/Wvla-parameter-8.c: New test.
So as I mentioned in IRC, at the time you posted this I had just extracted a testcase from a package build failure. Your timing was impeccable to get my immediate attention :-) OK. jeff
