It looks like simple quoted-printable encoding of headers works!

[nmh] / m4 / locking.m4

diff --git a/m4/locking.m4 b/m4/locking.m4
index e013790a5de6e2e0e12794db0f637026b447c3dc..2895d882779f5214a5bfb98416e8223a5b054e87 100644 (file)
--- a/m4/locking.m4
+++ b/m4/locking.m4
@@ -33,11 +33,19 @@ AS_CASE([$with_locking],
     [AC_MSG_ERROR([--without-locking not supported])],
   [AC_MSG_ERROR([Unknown locking type $with_locking])])
 
-AC_DEFINE_UNQUOTED([DEFAULT_LOCKING], [$with_locking],
+AC_DEFINE_UNQUOTED([DEFAULT_LOCKING], ["$with_locking"],
   [The default lock type for the mail spool file])
+AC_SUBST([default_locking], [$with_locking])
 
 AC_MSG_RESULT([$with_locking])
 
+supported_locks="fcntl dot"
+AS_IF([test x"$ac_cv_func_flock" = x"yes"],
+  [supported_locks="$supported_locks flock"])
+AS_IF([test x"$ac_cv_func_lockf" = x"yes"],
+  [supported_locks="$supported_locks lockf"])
+AC_SUBST([supported_locks])
+
 dnl Should we use a locking directory?
 AC_ARG_ENABLE([lockdir],
   [AS_HELP_STRING([--enable-lockdir=dir], [Store dot-lock files in "dir"])], [