test harness: improve catching of usage errors in script 'test-driver'

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

diff --git a/m4/missing.m4 b/m4/missing.m4
index 1b15774..6dea461 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) 1997-2013 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)
 # ------------------------------
@@ -11,39 +13,26 @@ AC_DEFUN([AM_MISSING_PROG],
 $1=${$1-"${am_missing_run}$2"}
 AC_SUBST($1)])
 
-
-# AM_MISSING_INSTALL_SH
-# ---------------------
-# Like AM_MISSING_PROG, but only looks for install-sh.
-AC_DEFUN([AM_MISSING_INSTALL_SH],
-[AC_REQUIRE([AM_MISSING_HAS_RUN])
-if test -z "$install_sh"; then
-   for install_sh in "$ac_aux_dir/install-sh" \
-                     "$ac_aux_dir/install.sh" \
-                     "${am_missing_run}${ac_auxdir}/install-sh";
-   do
-     test -f "$install_sh" && break
-   done
-   # FIXME: an evil hack: we remove the SHELL invocation from
-   # install_sh because automake adds it back in.  Sigh.
-   install_sh=`echo $install_sh | sed -e 's/\${SHELL}//'`
-fi
-AC_SUBST(install_sh)])
-
-
 # AM_MISSING_HAS_RUN
 # ------------------
-# Define MISSING if not defined so far and test if it supports --run.
-# If it does, set am_missing_run to use it, otherwise, to nothing.
+# Define MISSING if not defined so far and test if it is modern enough.
+# If it is, set am_missing_run to use it, otherwise, to nothing.
 AC_DEFUN([AM_MISSING_HAS_RUN],
-[test x"${MISSING+set}" = xset ||
-  MISSING="\${SHELL} `CDPATH=:; cd $ac_aux_dir && pwd`/missing"
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+AC_REQUIRE_AUX_FILE([missing])dnl
+if test x"${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="$MISSING --run "
+if eval "$MISSING --is-lightweight"; then
+  am_missing_run="$MISSING "
 else
   am_missing_run=
-  am_backtick='`'
-  AC_MSG_WARN([${am_backtick}missing' script is too old or missing])
+  AC_MSG_WARN(['missing' script is too old or missing])
 fi
 ])