[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 --- Comment #9 from joseph at codesourcery dot com --- The original intent in the C standard was definitely to allow at least some cases of subobjects; the May 20, 1988 list of changes in the third public review draft of C89 has as item 10 "The offsetof macro has been generalized to allow more than just a simple identifier as its second argument.".
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 --- Comment #8 from Jakub Jelinek --- See also http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2396.htm#dr_496
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek ---
(In reply to Eric Gallager from comment #6)
> (In reply to Nathan Sidwell from comment #2)
> > stupid underspecified offsetof
>
> Is this related to bug 65254?
Is that a bug?
Looking at both C and C++, offsetof seems underspecified, it doesn't say what
exactly the member-designator is or can be.
C talks about
static type t;
and
&(t.member-designator)
but one can put there say foo.bar.baz or qux[2].corge in that expression.
C++ defers mostly to the C standard, and if type is say
struct S { int s; };
then in C++ with
static S t;
the following
&(t.S::s)
is valid expression and S::s designates the member.
So it is unclear on what makes clang think that anything but an identifier as
member-designator is non-standard.
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 Eric Gallager changed: What|Removed |Added CC||egallager at gcc dot gnu.org --- Comment #6 from Eric Gallager --- (In reply to Nathan Sidwell from comment #2) > stupid underspecified offsetof Is this related to bug 65254?
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 --- Comment #5 from Nathan Sidwell --- On 12/16/20 12:45 PM, dcb314 at hotmail dot com wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 > > --- Comment #3 from David Binderman --- > (In reply to Nathan Sidwell from comment #2) >> stupid underspecified offsetof > > I did try commenting out the offending block of code and a re-build > and got further errors ;-< > > I don't know if you have access to clang, but if you don't, > may I be so bold as to suggest you install a copy and, if > you have the time, attempt a full build with clang ? but, but, that'd require me to do actual work ! > > That should flush out all the gcc specific code in your recent changes. > > Excellent compiler, BTW. which, clang or GCC? (why not both ¯\_(ツ)_/¯) nathan
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 Nathan Sidwell changed: What|Removed |Added Resolution|--- |FIXED Status|UNCONFIRMED |RESOLVED --- Comment #4 from Nathan Sidwell --- Fixed 8379916b167
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 --- Comment #3 from David Binderman --- (In reply to Nathan Sidwell from comment #2) > stupid underspecified offsetof I did try commenting out the offending block of code and a re-build and got further errors ;-< I don't know if you have access to clang, but if you don't, may I be so bold as to suggest you install a copy and, if you have the time, attempt a full build with clang ? That should flush out all the gcc specific code in your recent changes. Excellent compiler, BTW.
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 Nathan Sidwell changed: What|Removed |Added Assignee|unassigned at gcc dot gnu.org |nathan at gcc dot gnu.org --- Comment #2 from Nathan Sidwell --- stupid underspecified offsetof
[Bug bootstrap/98323] current trunk won't build with clang
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98323 David Binderman changed: What|Removed |Added CC||nathan at gcc dot gnu.org --- Comment #1 from David Binderman --- git blame says 4efde6781bba (Nathan Sidwell 2020-12-14 11:40:44 -0800 4153) /* Create or extend the dump implementor. */ 4efde6781bba (Nathan Sidwell 2020-12-14 11:40:44 -0800 4154) unsigned current = dumps ? dumps->stack.length () : 0; 4efde6781bba (Nathan Sidwell 2020-12-14 11:40:44 -0800 4155) unsigned count = current ? current * 2 : EXPERIMENT (1, 20); 4efde6781bba (Nathan Sidwell 2020-12-14 11:40:44 -0800 4156) size_t alloc = (offsetof (impl, impl::stack) 4efde6781bba (Nathan Sidwell 2020-12-14 11:40:44 -0800 4157) + impl::stack_t::embedded_size (count)); 4efde6781bba (Nathan Sidwell 2020-12-14 11:40:44 -0800 4158) dumps = XRESIZEVAR (impl, dumps, alloc); 4efde6781bba (Nathan Sidwell 2020-12-14 11:40:44 -0800 4159) dumps->stack.embedded_init (count, current); Adding Nathan.
