I'm trying to compile a graphics program- pgplot, on my Vaxstation 3100 M76. Hobbyist VaxVMS 7.3, Dec C, DEC C++, Fortran compilers from Hobbyist distro. When I installed the OS it was from an attached VT320 to the console/printer port. I have no cables/monitor yet to run the display. I also installed DWMotif.
The code is a mixture of Fortran and C programs and wants to use X windows.
The compile gets through the Fortran portion, it uses an DECW include file: DECW$XLIBDEF.FOR, which it finds.
However, the C compiler can't find <X11/Xos.h> and halts. I assume it won't find any of the other <X11..> includes either. The compile.com file that is compiling the code has this line in it, $ DEFINE/NOLOG X11 DECW$INCLUDE.
What product installs the X11 headers? What am I missing?