Re: GCC6: failure with -isystem /usr/include
On 2 February 2016 at 07:50, Sandro Mani wrote:
On 02.02.2016 13:38, Jakub Jelinek wrote:
> On Tue, Feb 02, 2016 at 01:32:17PM +0100, Sandro Mani wrote:
> Don't use -isystem /usr/include for C++, unless you also include first all
> the C++ include directories as -isystem too. Why do you need that?
> -isystem /usr/include is the default, but in proper place, not prepended
> before system headers.
QMake is generating such Makefiles. Looks like the combination of
/usr/lib64/qt5/mkspecs/common/gcc-base.conf: QMAKE_CFLAGS_ISYSTEM =
-isystem
and
/usr/lib64/qt5/mkspecs/common/qconfig.pri: QMAKE_DEFAULT_INCDIRS =
/usr/include/c++/5.3.1 /usr/include/c++/5.3.1/x86_64-redhat-linux
/usr/include/c++/5.3.1/backward
/usr/lib/gcc/x86_64-redhat-linux/5.3.1/include /usr/local/include
/usr/include
From which it seems that the actual cause of the issue is that qt5-qtbase is
not yet rebuilt against GCC6 and hence the C++ includes are missing.
The current (as of this email) qt5-qtbase is built with GCC6, but the
issue persists.
The builds seem fine with the above QMAKE_DEFAULT_INCDIRS line removed
manually. Should this issue be fixed in the qt5-qtbase package?
Thanks,
Orcan