make: unifdef for other OSes (undefined)

*** 40,53 ****
  #include <mksh/misc.h>          /* getmem() */
  #include <mksh/read.h>          /* get_next_block_fn() */
  #include <sys/uio.h>            /* read() */
  #include <unistd.h>             /* read(), unlink() */
  
- #if defined(HP_UX) || defined(linux)
- #include <avo/types.h>
- extern "C" Avo_err *avo_find_run_dir(char **dirp);
- #endif
  
  /*
   * typedefs & structs
   */
  
--- 40,49 ----
*** 115,128 ****
          Name                    normalized_makefile_name;
          register wchar_t        *string_start;
          register wchar_t        *string_end;
  
  
- #if defined(HP_UX) || defined(linux)
-         Avo_err                 *findrundir_err;
-         char                    *run_dir, makerules_dir[BUFSIZ];
- #endif
  
          wchar_t * wcb = get_wstring(makefile_name->string_mb);
  
  #ifdef NSE
          if (report_file){
--- 111,120 ----