[Info-vax] Can C #includes like this be made to work onVMS?

[Brian Schenkenberger]

I want to port a freeware package. It's C code is littered with includes like:

#include "package_name/include_file.h"

I've tried the DECC$***_INCLUDE logicals, the CC command quilifier 
/INCLUDE_DIRECTORY and logicals, rooted and otherwise, defining 
"package_name". Can't get the C compiler to find include_file.h.