m4: get rid of "# serial" lines

[platform/upstream/automake.git] / m4 / missing.m4

diff --git a/m4/missing.m4 b/m4/missing.m4
index 868aa6b..6c2a55d 100644 (file)
--- a/m4/missing.m4
+++ b/m4/missing.m4
@@ -1,8 +1,10 @@
-## --------------------------------------------------------- ##
-## Fake the existence of programs that GNU maintainers use.  ##
-## --------------------------------------------------------- ##
+# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
 
-# serial 2
+# Copyright (C) 1997-2012 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
 
 # AM_MISSING_PROG(NAME, PROGRAM)
 # ------------------------------
@@ -11,20 +13,26 @@ AC_DEFUN([AM_MISSING_PROG],
 $1=${$1-"${am_missing_run}$2"}
 AC_SUBST($1)])
 
-
 # AM_MISSING_HAS_RUN
 # ------------------
 # Define MISSING if not defined so far and test if it supports --run.
 # If it does, set am_missing_run to use it, otherwise, to nothing.
 AC_DEFUN([AM_MISSING_HAS_RUN],
 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
-test x"${MISSING+set}" = xset || MISSING="\${SHELL} $am_aux_dir/missing"
+AC_REQUIRE_AUX_FILE([missing])dnl
+if test x"${MISSING+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\    *)
+    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
+  *)
+    MISSING="\${SHELL} $am_aux_dir/missing" ;;
+  esac
+fi
 # Use eval to expand $SHELL
 if eval "$MISSING --run true"; then
   am_missing_run="$MISSING --run "
 else
   am_missing_run=
-  am_backtick='`'
-  AC_MSG_WARN([${am_backtick}missing' script is too old or missing])
+  AC_MSG_WARN(['missing' script is too old or missing])
 fi
 ])