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On Sun, Feb 24, 2013 at 12:43 AM, David Ostrovsky
<david.ostrovsky@gmx.de> wrote:
So we have weird breakage on MinGW:

in configure phase i686-w64-mingw32-g++ reports back success for that check:

configure:15247: checking whether ccache i686-w64-mingw32-g++ supports C++11
perfect forwarding
configure:15275: ccache i686-w64-mingw32-g++ -c  -std=gnu++0x conftest.cpp
&5

Apparently gnu++0x is no longer recognized as a synonym of gnu++11.
There are several references in the error log to features "only
available with -std=c++11 or -std=gnu++11".

configure:15275: $? = 0
configure:15288: result: yes

setting HAVE_CXX11_PERFECT_FORWARDING to 1
and then failing in compile phase with the question: what's that [1].

Workaround for now is uncomment export lines in configure.ac, then it s
happy again [2]

Environment:

newest OpenSUSE,
david@numpty>i686-w64-mingw32-g++ --version
i686-w64-mingw32-g++ (GCC) 4.7.2

[1] https://ci.idaia.de/job/LO-Mingw64/142/console
[2] https://ci.idaia.de/job/LO-Mingw64/151/console

David
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