bug#21547: [PATCH] elisp: run emacs with --no-site-file

[Mike Frysinger]

Fixes automake bug https://bugs.gnu.org/21547.

If users have interactive site file logic, the lispdir probing can
hang, as can the compilation of elisp files.  Use --no-site-file to
disable loading any of that possible user logic.

* NEWS: Note emacs --no-site-file change.
* doc/automake.texi: Run emacs with --no-site-file.
* lib/am/lisp.am: Likewise.
* m4/lispdir.m4: Likewise.
---
 NEWS              | 5 +++++
 doc/automake.texi | 2 +-
 lib/am/lisp.am    | 2 +-
 m4/lispdir.m4     | 2 +-
 4 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/NEWS b/NEWS
index 29c4d8a96588..40384264c4ab 100644
--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,11 @@ please see NEWS-2.0 and start following the advice there now.
 
 New in 1.17:
 
+* Bugs fixed
+
+  - When compiling emacs lisp files, emacs is run with --no-site-file to
+    disable user config files that might hang or access the terminal.
+
 * New features added
 
   - RANLIB may be overridden on a per-target basis.
diff --git a/doc/automake.texi b/doc/automake.texi
index 4a2c17fa9044..b6a38dc27ce5 100644
--- a/doc/automake.texi
+++ b/doc/automake.texi
@@ -13349,7 +13349,7 @@ instance, here is how @code{AM_PATH_LISPDIR} 
(@pxref{Emacs Lisp})
 computes @samp{$(lispdir)}:
 
 @example
-$EMACS -batch -Q -eval '(while load-path
+$EMACS -batch -Q --no-site-file -eval '(while load-path
   (princ (concat (car load-path) "\n"))
   (setq load-path (cdr load-path)))' >conftest.out
 lispdir=`sed -n
diff --git a/lib/am/lisp.am b/lib/am/lisp.am
index 45c58a6da938..746f01679f72 100644
--- a/lib/am/lisp.am
+++ b/lib/am/lisp.am
@@ -38,7 +38,7 @@ endif %?INSTALL%
          esac; \
 ## Emacs byte-compilation won't create this automatically, sadly.
          test -d "$$am__dir" || $(MKDIR_P) "$$am__dir" || exit 1; \
-         $(EMACS) --batch \
+         $(EMACS) --batch --no-site-file \
            $(AM_ELCFLAGS) $(ELCFLAGS) \
            $$am__subdir_includes -L $(builddir) -L $(srcdir) \
            --eval '$(am__emacs_byte_compile_setup)' \
diff --git a/m4/lispdir.m4 b/m4/lispdir.m4
index 525e3ee6da38..6f9b89d2ca1a 100644
--- a/m4/lispdir.m4
+++ b/m4/lispdir.m4
@@ -34,7 +34,7 @@ AC_DEFUN([AM_PATH_LISPDIR],
   #  which is non-obvious for non-emacs users.
   # Redirecting /dev/null should help a bit; pity we can't detect "broken"
   #  emacsen earlier and avoid running this altogether.
-  AC_RUN_LOG([$EMACS -batch -Q -eval '(while load-path (princ (concat (car 
load-path) "\n")) (setq load-path (cdr load-path)))' </dev/null >conftest.out])
+  AC_RUN_LOG([$EMACS -batch -Q --no-site-file -eval '(while load-path (princ 
(concat (car load-path) "\n")) (setq load-path (cdr load-path)))' </dev/null 
>conftest.out])
        am_cv_lispdir=`sed -n \
        -e 's,/$,,' \
        -e 
'/.*\/lib\/x*emacs\/site-lisp$/{s,.*/lib/\(x*emacs/site-lisp\)$,${libdir}/\1,;p;q;}'
 \
-- 
2.34.1