On Wed, 20 May 2015 08:03:40 +0000 (UTC) Dirk Niebelus <dirkniebe...@yahoo.de> wrote:
> Hello, > I'm using Freebsd 9 (current FreeNAS) and my goal is to compile the qt5 port > with gcc493 and the std=c++11 switch enabled.The emphasis is here on the > c++11 switch, i figure if c++11 works i can use c++14 as well. > > Tried different things like modified the CXXFLAGS in make.conf. But it still > uses c++98 > I'm searching for a rock solid way to this. > > Thank you for the Qt Port!Dirk > You can have qmake5-built ports use some custom c++ flags by modifying the qmakespecs which are by default installed into /usr/local/lib/qt5/mkspecs by the devel/qmake5 port. The name to be set is called QMAKE_CXXFLAGS, and there's no specific place for it, though you will likely have to put it somewhere referenced by freebsd-g++.conf. To build devel/qmake5 itself using c++11/14 support, adding .if (!empty(.CURDIR:M*devel/qmake5*)) CXXFLAGS+= -std=c++1y .endif to /etc/make.conf works over here - of cause, you can just extend CXXFLAGS in make.conf for your qmake5 consumers instead of using the makespecs, too. AFAIK - unlike on Windows OS, or rather, Visual C++ - FreeBSD's c++98 binaries are ABI compatible to their c++11 built counterparts, and even linked to the same STL implementation, so I don't think there's a point of using c++11 compiler mode unless the code actually uses c++11. If some consumer port specifies pedantic compilation mode, requesting c++11 or 14 might even break the build. Alonso
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