emacs-28 7e437af: Fix temacs invocation from outside of the 'src' directory

[Eli Zaretskii]

branch: emacs-28
commit 7e437af41319330ddade02d9784cf78c8e6674d8
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix temacs invocation from outside of the 'src' directory
    
    * src/emacs.c (main) [HAVE_NATIVE_COMP]: Recompute the value of
    native-comp-eln-load-path if about to load loadup in uninitialized
    Emacs.  (Bug#51999)
---
 src/emacs.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/emacs.c b/src/emacs.c
index 866e43f..41c92a4 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -2284,6 +2284,17 @@ Using an Emacs configured with --with-x-toolkit=lucid 
does not have this problem
       /* Unless next switch is -nl, load "loadup.el" first thing.  */
       if (! no_loadup)
        Vtop_level = list2 (Qload, build_string ("loadup.el"));
+
+#ifdef HAVE_NATIVE_COMP
+      /* If we are going to load stuff in a non-initialized Emacs,
+        update the value of native-comp-eln-load-path, so that the
+        *.eln files will be found if they are there.  */
+      if (!NILP (Vtop_level) && !temacs)
+       Vnative_comp_eln_load_path =
+         Fcons (Fexpand_file_name (XCAR (Vnative_comp_eln_load_path),
+                                   Vinvocation_directory),
+                Qnil);
+#endif
     }
 
   /* Set up for profiling.  This is known to work on FreeBSD,