.dwg file viewer
To open a .dwg file, was trying to compile lx-viewer but then stucked at ad2.a and ad3.a, OpenDWG library files.. And found below link, http://www.fsf.org/campaigns/priority.html#opendwgreplacement Now what? .. Wikipedia says.. There are no open source viewers for DWG files since the licensing of the libraries needed by lx-viewer[41] now restricts their use to members of the Open Design Alliance..
2010.09.07