请教高手，能否解释编译提示。

yulb

--------------------Configuration: ylbacad_ARX - Win32 Debug--------------------
Linking...
LINK : warning LNK4075: ignoring /EDITANDCONTINUE due to /INCREMENTAL:NO specification
   Creating library Debug/ylbacad_ARX.lib and object Debug/ylbacad_ARX.exp
rxapi.lib(libinit.obj) : warning LNK4099: PDB "acdbhdr.pdb" was not found with "e:\ObjectARX2002\lib\rxapi.lib" or at "D:\ylbacad_ARX\Debug\acdbhdr.pdb"; linking object as if no debug info
acedapi.lib(acedstub.obj) : warning LNK4099: PDB "corehdr.pdb" was not found with "e:\ObjectARX2002\lib\acedapi.lib" or at "D:\ylbacad_ARX\Debug\corehdr.pdb"; linking object as if no debug info

ylbacad_ARX.arx - 0 error(s), 3 warning(s)