GH-66409: check if exec_prefix is the same as prefix before searching executable_dir

Signed-off-by: Filipe Laíns <[email protected]

Author: FFY00

Modules/getpath.py

@@ -621,6 +621,8 @@ def search_up(prefix, *landmarks, test=isfile):
             # gh-100320: Our PYDs are assumed to be relative to the Lib directory
             # (that is, prefix) rather than the executable (that is, executable_dir)
             exec_prefix = prefix
+        if not exec_prefix and prefix and isdir(joinpath(prefix, PLATSTDLIB_LANDMARK)):
+            exec_prefix = prefix
         if not exec_prefix and executable_dir:
             exec_prefix = search_up(executable_dir, PLATSTDLIB_LANDMARK, test=isdir)
         if not exec_prefix and EXEC_PREFIX: