In gr-usrp/src/lib and gr-usrp/src/app, compiling requires the file
"usrp_dbid.h", which used to be in "${abs_top_srcdir}/usrp/host/lib/
legacy", but with the change-over to C++ this file is now built during
compilation and is located in "${abs_top_builddir}/usrp/host/lib/
legacy". The INCLUDES were not updated to reflect this change, and
hence compiling errors out in either / both of those directories (same
way, but a different fix is required for each). A quick fix is
appended ("svn diff"), but I'm not sure it's the correct fix (it does
work for me). - MLD