GNO with ORCA: Where should my C header files go? A#6.4: === See the CAVEAT in Q#6.
While it is possible to have all of your header files in one directory hierarchy (this is how it was done in the stock v2.0.4 distribution), it is STRONGLY advised that you keep separate directory hierarchies. They are: /usr/include /HFSinclude /lang/orca/libraries/orcacdefs /lib/orcacdefs /usr/local/include The /usr/include directory should contain all the header files that ship with GNO. This will include some subdirectories like sys, machine, and net. In GNO v2.0.6 there are a few files that don’t conform to ProDOS naming conventions. These files should be placed in the /HFSinclude hierarchy. ORCA/C comes with its own set of header files. Some of these are used by GNO while others are ignored (because header files of the same names exist in one of the other directory hierarchies). All of these header files should be left in the /lang/orca/libraries/orcacdefs directory (see Q#6.2). /lib/orcacdefs corresponds to 13/orcacdefs under GNO. It should contain only one file, defaults.h.
