I followed the installation guide and installed all the packages mentioned. However, I end up with this error message while running ./configure
checking for osgEarth with CFLAGS=" -fPIC -fno-stack-protector " LIBS=" -losgEarth -losgEarthUtil"... no configure: error: Cannot find osgEarth 2.7 or later. Set WITH_OSGEARTH=no in configure.user to disable this feature or install an up to date version of osgEarth.
Here is a link to my config.log file : config.log