🚀 go-pugleaf

I have a number of problems with my Linux/gcc setup.
I have recently installed Moo-Tiff on my system but I'm having trouble with
compiling and linking.
Basically during compile it gives errors such as stddef.h not found....
During linking of even simple progs like

  gcc -o test test.c -lXm -lXt -lX11
or
  gcc -o test test.c -lsocket

I get errors to the effect that the libraries cannot be found.
when use the -L and give the path name of the libs then it's ok.

I presume this is all due some kind of configuration problem....
Any ideas as to how I can fix this will be much appriciated.

Many Thanks.

Arman
izaec@wmin.ac.uk