configure.ac: no use to add "+" before ac_ext=c

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/configure.ac b/configure.ac
index b21ad4482d58a5a24ae5555e7e7b982f45549760..b29583edad774a194a7994e7b8c45cfd4ff794de 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1020,7 +1020,7 @@ AC_MSG_RESULT([no])
 ])
 
 AC_MSG_CHECKING([for sched.h])
-+AC_LANG_PUSH([C++])
+AC_LANG_PUSH([C++])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #define _GNU_SOURCE
 #include <sched.h>
@@ -1037,7 +1037,7 @@ AC_DEFINE([HAVE_SCHED], 1, [Define to 1 if you have sched.h.])
 ], [
 AC_MSG_RESULT([no])
 ])
-+AC_LANG_POP([C++])
+AC_LANG_POP([C++])
 
 
 #