title: Eclipse CDT Invalid Project Path
body: <p>I have a C project that is built using a makefile, Eclipse constantly warns about "Invalid project path: Duplicate path entries", but I cannot figure out what the hell it wants me to do.  I would like to disable this warning and continue with my life.</p>
  
  <p>My application compiles and runs fine, with not a single warning except this one.  Being a conscientious developer I am keen to fix this problem so I have the warm fuzzies only a clean build can bring.</p>