Re: Chromium C++ help needed

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, Mar 11, 2019 at 01:16:07PM -0400, Tom Callaway wrote:
> I spent some time this weekend trying to get Chromium 72 building on
> Fedora, but I kept running into a C++ issue that I was not able to resolve.
> This happened with gcc-9.0.1-0.8.fc30.x86_64 and gcc-8.3.1-2.fc29.x86_64.

Can you please provide preprocessed source + g++ command line options,
from the snippets it is hard to see what's going on.
>From the description it seems maybe like:
template <int N>
struct S {
  static constexpr int a[2] = { 1, 2 };
};
static_assert (&S<0>::a[1] != nullptr);

which g++ accepts for -std=c++{11,14} but rejects for -std=c++{17,2a} when
S<0>::a is an inline variable.  I think we have a similar
http://gcc.gnu.org/PR89074 .  The middle-end punts here and doesn't optimize
the != NULL to true because it is address of a comdat variable and thus it
in the end could come up from any other TU.  Though perhaps in these cases
the standard gives us some guarantees.

	Jakub
_______________________________________________
devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Fedora Announce]     [Fedora Users]     [Fedora Kernel]     [Fedora Testing]     [Fedora Formulas]     [Fedora PHP Devel]     [Kernel Development]     [Fedora Legacy]     [Fedora Maintainers]     [Fedora Desktop]     [PAM]     [Red Hat Development]     [Gimp]     [Yosemite News]

  Powered by Linux