[Bug 216054] graphics/openshadinglanguage: fails to build with libc++ 4.0

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216054

Jan Beich (mail not working) <jbeich at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |eric at efcs.ca

--- Comment #1 from Jan Beich (mail not working) <jbeich at FreeBSD.org> ---
libc++ 4.0 is just broken with old compilers. One workaround would be to build
against devel/libc++ which tracks old version.

$ cat a.cc
#include <string>

int main() { return 0; }

$ clang++34 a.cc
In file included from a.cc:1:
In file included from /usr/include/c++/v1/string:470:
In file included from /usr/include/c++/v1/string_view:171:
In file included from /usr/include/c++/v1/__string:56:
In file included from /usr/include/c++/v1/algorithm:637:
/usr/include/c++/v1/type_traits:2075:14: error: expected class name
    : public decltype((_VSTD::__is_assignable_test<_Tp, _Arg>(0))) {};
             ^
/usr/include/c++/v1/__config:747:25: note: expanded from macro 'decltype'
#  define decltype(__x) __typeof__(__x)
                        ^
1 error generated.

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