[HP-UX]What are those warning messages for?

grace_limi

[HP-UX B.11.00]

I was compliling & linking C programs under HP-UX 11.0.0. As long as I was linking those .o files, I encountered the following warning messages:

      /usr/ccs/bin/ld: warning 1590, parm \"\"
      pxdb32: warning: corrupted PD table
      pxdb32: warning: corrupted PD table
      pxdb32: warning: corrupted PD table
      pxdb32: warning: corrupted PD table
      ...................................

The makefile line involved is:

      cc emergency.o $(OBJS) -ltoollib -laplgn -lngnrl -o emergency.$(REV)

Who can tell me what are the warning messages for?