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1a4f80428d
25ba36180c causes
build failures on Ubuntu 16.04 and 18.04 with gcc
{{{
/usr/bin/c++ -I/usr/include/x86_64-linux-gnu/qt5 -I/usr/include/x86_64-linux-gnu/qt5/QtCore -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I/usr/include/Qca-qt5/QtCrypto -fPIE -std=gnu++11 -o CMakeFiles/cmTC_3b936.dir/qcaossl.cpp.o -c /home/even/qgis/QGIS/build/CMakeFiles/CMakeTmp/qcaossl.cpp
In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qchar.h:37:0,
from /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:41,
from /usr/include/x86_64-linux-gnu/qt5/QtCore/QString:1,
from /usr/include/Qca-qt5/QtCrypto/qca_core.h:36,
from /usr/include/Qca-qt5/QtCrypto/qca.h:36,
from /usr/include/Qca-qt5/QtCrypto/QtCrypto:1,
from /home/even/qgis/QGIS/build/CMakeFiles/CMakeTmp/qcaossl.cpp:2:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:1067:4: error: #error "You must build your code with position independent code if Qt was built with -reduce-relocations. " "Compile your code with -fPIC (-fPIE is not enough)."
# error "You must build your code with position independent code if Qt was built with -reduce-relocations. "\
^
}}}
qtglobal.h doesn't like -fPIC and -fPIE together
See https://github.com/qgis/QGIS/pull/6093#issuecomment-393518711