18  * dependent directory (exec_prefix), containing the shared library
19  * modules.  Note that prefix and exec_prefix can be the same directory,
22  * Py_GetPath() carries out separate searches for prefix and exec_prefix.
24  * file or directory is found.  If no prefix or exec_prefix is found, a
26  * EXEC_PREFIX are used (even though they will not work); python carries on
44  * are performed for prefix and for exec_prefix, but with a different
51  * not quite, what we need).  For exec_prefix, the landmark is
55  * lib/python$VERSION/os.py and the exec_prefix will always be
64  * it points to prefix and exec_prefix.  $PYTHONHOME can be a single
65  * directory, which is used for both, or the prefix and exec_prefix
68  * Step 3. Try to find prefix and exec_prefix relative to argv0_path,
70  * step to succeed.  Note that if prefix and exec_prefix are different,
71  * exec_prefix is more likely to be found; however if exec_prefix is a
75  * PREFIX and EXEC_PREFIX.  These are supplied by the Makefile but can be
80  * Well, almost.  Once we have determined prefix and exec_prefix, the
85  * prefix and exec_prefix globals are tweaked so they reflect the values
91  * known use of sys.prefix and sys.exec_prefix is for the ILU installation
100 #if !defined(PREFIX) || !defined(EXEC_PREFIX) || !defined(VERSION) || !defined(VPATH)
101 #error "PREFIX, EXEC_PREFIX, VERSION, and VPATH must be constant defined"
109 static char exec_prefix[MAXPATHLEN+1];  variable
314             strncpy(exec_prefix, delim+1, MAXPATHLEN);  in search_for_exec_prefix()
316             strncpy(exec_prefix, home, MAXPATHLEN);  in search_for_exec_prefix()
317         joinpath(exec_prefix, lib_python);  in search_for_exec_prefix()
318         joinpath(exec_prefix, "lib-dynload");  in search_for_exec_prefix()
325     strcpy(exec_prefix, argv0_path);  in search_for_exec_prefix()
326     joinpath(exec_prefix, "pybuilddir.txt");  in search_for_exec_prefix()
327     if (isfile(exec_prefix)) {  in search_for_exec_prefix()
328       FILE *f = fopen(exec_prefix, "r");  in search_for_exec_prefix()
337 	strcpy(exec_prefix, argv0_path);  in search_for_exec_prefix()
338 	joinpath(exec_prefix, rel_builddir_path);  in search_for_exec_prefix()
344     copy_absolute(exec_prefix, argv0_path);  in search_for_exec_prefix()
346         n = strlen(exec_prefix);  in search_for_exec_prefix()
347         joinpath(exec_prefix, lib_python);  in search_for_exec_prefix()
348         joinpath(exec_prefix, "lib-dynload");  in search_for_exec_prefix()
349         if (isdir(exec_prefix))  in search_for_exec_prefix()
351         exec_prefix[n] = '\0';  in search_for_exec_prefix()
352         reduce(exec_prefix);  in search_for_exec_prefix()
353     } while (exec_prefix[0]);  in search_for_exec_prefix()
355     /* Look at configure's EXEC_PREFIX */  in search_for_exec_prefix()
356     strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);  in search_for_exec_prefix()
357     joinpath(exec_prefix, lib_python);  in search_for_exec_prefix()
358     joinpath(exec_prefix, "lib-dynload");  in search_for_exec_prefix()
359     if (isdir(exec_prefix))  in search_for_exec_prefix()
536                 "Could not find platform dependent libraries <exec_prefix>\n");  in calculate_path()
537         strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);  in calculate_path()
538         joinpath(exec_prefix, "lib/lib-dynload");  in calculate_path()
540     /* If we found EXEC_PREFIX do *not* reduce it!  (Yet.) */  in calculate_path()
544                 "Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]\n");  in calculate_path()
575     bufsz += strlen(exec_prefix) + 1;  in calculate_path()
633         strcat(buf, exec_prefix);  in calculate_path()
640     /* Reduce prefix and exec_prefix to their essence,  in calculate_path()
657         reduce(exec_prefix);  in calculate_path()
658         reduce(exec_prefix);  in calculate_path()
659         reduce(exec_prefix);  in calculate_path()
660         if (!exec_prefix[0])  in calculate_path()
661                 strcpy(exec_prefix, separator);  in calculate_path()
664         strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);  in calculate_path()
691     return exec_prefix;  in Py_GetExecPrefix()