mkspec file for "Generic Linux Device" could be useful

In order to ease cross-compiling of qt for a generic linux system, I think there should be "Generic" device directory under mkspecs/devices/. qmake.conf for this device will consist of just three lines:

include(../common/linux_device_pre.conf)
include(../common/linux_device_post.conf)
load(qt_config)

That's enough for reasonable defaults. Users could use:

 ./configure -device linux-generic-g++ -device-option CROSS_COMPILE=... ... -device-option QMAKE_CFLAGS="..." ...

This will also help packaging in projects like buildroot which supports different toolchains, target devices, etc.