qt5 build dependency on clang

Sat Apr 22 20:59:22 UTC 2017

On 2017-04-22, at 1:55 PM, db wrote:

> On 22 Apr 2017, at 21:58, Ryan Schmidt <ryandesign at macports.org> wrote:
>> Sounds plausible. What's your question / problem with this?
> 
> Ken already point me to cxx11-1.1.tcl, but I still don't get why 4.0 isn't whitelisted in a system whose default is set to 3.9.
> 

because cxx_stdlib will equal libc++ and therefore this test (which would lead to the code that does the whitelisting) will fail.

if {${cxx_stdlib} eq "libstdc++" }
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