Missing some widgets in shared/static linking option

I tried to port an app from ph1.13 to ph2.0. All was fine except
PtNumericFloat was an undefine reference.
I then linked static - how suggested in aother articel - but now
PgDrawPixel() / PgDrawPixelArray is an undefined reference. I use this
in a shared lib which is given with -l library to the link flags. If I use
PgDrawPixel() in the source code of my ph appl.
the link process works.
Hmmm…any idea ?
cheers, Peter