Prefer expand-file-name to concat in native-compilation code

* lisp/emacs-lisp/comp.el (comp-eln-load-path-eff):
* src/comp.c (Fcomp_el_to_eln_filename)
(eln_load_path_final_clean_up): Prefer expand-file-name to concat.
(Bug#43725)

2 files changed, 7 insertions, 7 deletions

diff --git a/lisp/emacs-lisp/comp.el b/lisp/emacs-lisp/comp.el
index 97efd1ab0c7..5a4a2f6ef15 100644
--- a/lisp/emacs-lisp/comp.el
+++ b/lisp/emacs-lisp/comp.el
@@ -3691,9 +3691,9 @@ Prepare every function for final compilation and drive the C back-end."
   "Return a list of effective eln load directories.
 Account for `comp-load-path' and `comp-native-version-dir'."
   (mapcar (lambda (dir)
-            (concat (file-name-as-directory
-                     (expand-file-name dir invocation-directory))
-                    comp-native-version-dir))
+            (expand-file-name comp-native-version-dir
+                              (file-name-as-directory
+                               (expand-file-name dir invocation-directory))))
           comp-eln-load-path))
 
 (defun comp-trampoline-filename (subr-name)
diff --git a/src/comp.c b/src/comp.c
index a79ee4ad87b..29b16c78ac0 100644
--- a/src/comp.c
+++ b/src/comp.c
@@ -4121,8 +4121,8 @@ If BASE-DIR is nil use the first entry in `comp-eln-load-path'.  */)
     base_dir = Fexpand_file_name (base_dir, Vinvocation_directory);
 
   return Fexpand_file_name (filename,
-                            concat2 (Ffile_name_as_directory (base_dir),
-                                     Vcomp_native_version_dir));
+                            Fexpand_file_name (Vcomp_native_version_dir,
+                                               base_dir));
 }
 
 DEFUN ("comp--install-trampoline", Fcomp__install_trampoline,
@@ -4613,8 +4613,8 @@ eln_load_path_final_clean_up (void)
     {
       Lisp_Object files_in_dir =
         internal_condition_case_5 (Fdirectory_files,
-                                   concat2 (XCAR (dir_tail),
-                                            Vcomp_native_version_dir),
+                                   Fexpand_file_name (Vcomp_native_version_dir,
+                                                      XCAR (dir_tail)),
                                    Qt, build_string ("\\.eln\\.old\\'"), Qnil,
                                    Qnil, Qt, return_nil);
       FOR_EACH_TAIL (files_in_dir)