QMAKE_DEFAULT_INCDIRS = \
    /usr/include/c++/6 \
    /usr/include/x86_64-linux-gnu/c++/6 \
    /usr/include/c++/6/backward \
    /usr/lib/gcc/x86_64-linux-gnu/6/include \
    /usr/local/include \
    /usr/lib/gcc/x86_64-linux-gnu/6/include-fixed \
    /usr/include/x86_64-linux-gnu \
    /usr/include
QMAKE_DEFAULT_LIBDIRS = \
    /usr/lib/gcc/x86_64-linux-gnu/6 \
    /usr/lib/x86_64-linux-gnu \
    /usr/lib \
    /lib/x86_64-linux-gnu \
    /lib