added TINE_EXPORT C macro/constant to the compiler flags, which seens to be required for the latest DOOCS version

need to find DOOCS_DIR first, since this is the variable which might be specified at the cmake command line

Martin Killenberg authored 8 years ago and Martin Killenberg committed 8 years ago

use readelf instead of readlink to extract the DOOCS version and do not strip the system-dependent part of the version (e.g. -xenial1), since it is needed to identify the version correctly.