add --disable-gxx0xcheck option to configure

[[Imported from SVN: r5274]]

m4/static_assert.m4

 AC_DEFUN([GXX0X],[
   AC_REQUIRE([AC_PROG_CXX])
+  AC_ARG_ENABLE(gxx0xcheck,
+		AC_HELP_STRING([--disable-gxx0xcheck],
+                 [try to enabel c++0x feature for g++ [[default=yes]]]),
+		  		 [gxx0xcheck=$enable],
+				 [gxx0xcheck=yes])
   AC_LANG_PUSH([C++])
-  if test "x$GXX" = xyes; then
+  if test "x$GXX" = xyes && test "x$gxx0xcheck" = xyes; then
     AC_MSG_CHECKING([whether g++ accepts -std=c++0x])
     ac_save_CXXFLAGS="$CXXFLAGS"
     CXXFLAGS="$CXXFLAGS -std=c++0x"
@@ -14,14 +19,17 @@ AC_DEFUN([GXX0X],[
 ])
 
 AC_DEFUN([STATIC_ASSERT_CHECK],[
+  AC_REQUIRE([AC_PROG_CXX])
+  AC_REQUIRE([GXX0X])
   AC_LANG_PUSH([C++])
   AC_MSG_CHECKING([whether static_assert is supported])
   AC_TRY_COMPILE([],[static_assert(true,"MSG")], [
-    HAVE_STATIC_ASSERT=0,
+    HAVE_STATIC_ASSERT=no,
     AC_MSG_RESULT(yes)], [
-    HAVE_STATIC_ASSERT=1,
+    HAVE_STATIC_ASSERT=yes,
     AC_MSG_RESULT(no)])
-  if test x$HAVE_STATIC_ASSERT = x1; then
+  echo HAVE_STATIC_ASSERT $HAVE_STATIC_ASSERT
+  if test "x$HAVE_STATIC_ASSERT" = xyes; then
     AC_DEFINE(HAVE_STATIC_ASSERT, 1, [Define to 1 if static_assert is supported])
   fi
   AC_LANG_POP