autoconf: Error out on --without-shell and --without-perl

Error out on --without-shell/--with-shell=no and
--without-perl/--with-perl=no instead of just warning
and continuing.

Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/configure.ac b/configure.ac
index e2da89114e31507c9784141f1ab4255cb3cb76b9..c2ddd9b6e8faec7aa6c6975024e3ae893c428f88 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -37,7 +37,7 @@ AC_DEFUN([GIT_ARG_SET_PATH],
 AC_DEFUN([GIT_CONF_APPEND_PATH],
 [PROGRAM=m4_toupper($1); \
 if test "$withval" = "no"; then \
-       AC_MSG_WARN([You cannot use git without $1]); \
+       AC_MSG_ERROR([You cannot use git without $1]); \
 else \
        if test "$withval" = "yes"; then \
                AC_MSG_WARN([You should provide path for --with-$1=PATH]); \