Missing std lib. references

["Soucek, L. (Libor)" <lsoucek@ford.com>]

Hi!
I've encounter problem with linking on HP. I believe it is standard
stuff and I also believe it is correctly defined in linker command
(extract below). Do you have some suggestion about solving this problem
(probably very easy to fix if one know how)? I've asked all my
colleagues but they've never had that problem.

System status:

> uname -a
> HP-UX sl0473 B.10.20 A 9000/785 2007433980 two-user license

Compiler:

> g++ -v
> Reading specs from /ford/ptrs14/unix/loc/gcc-2.95/HP-UX/lib/gcc-lib/hppa2.0-hp-hpux10.20/2.95.2/specs
> gcc version 2.95.2 19991024 (release)

Linking command was:

> ***** Final linking of PET *****
> .........................
> echo "/sl0270/u/petsoft/PET_PATCH"
> 
> /ptrs14/unix/loc/gcc-2.95/HP-UX/bin/g++ -o pet.GNU \
> comphierdlg.o infer.o petemo.o petfile.o petgpp.o petmodel.o \
> petoption_CB.o petoption_scrn.o petdump.o pethelp.o mssg.o petedit.o \
> petview.o petmain.o petmacro.o petundo.o version.o \ 
>         -lm \
> -L/usr/ccs/lib -ll -ly \ >-L/ptrs14/unix/loc/gcc-2.95/HP-UX/lib/gcc-lib/hppa2.0-hp-hpux10.20/2.95.2 -lgcc \
> -lstdc++ -lg2c \
> -L/usr/dt/lib -lXm \
> -L/usr/lib -lXt -lX11 -lXm \
> -L/usr/contrib/X11R6/lib -lXaw  -lXmu
>   
> /usr/ccs/bin/ld: Unsatisfied symbols:
>    __builtin_va_start (code)
>    treeWidgetClass (data)
>    XawTreeForceLayout (code)
> collect2: ld returned 1 exit status
> make: *** [pet] Error 1