restore the check for HAVE_CXX_NEW, it is actually used

configure.cmake

@@ -833,6 +833,16 @@ CHECK_C_SOURCE_COMPILES("
     HAVE_ATTRIBUTE_CLEANUP
 )
 
+CHECK_CXX_SOURCE_COMPILES("
+    #include <new>
+    int main()
+    {
+     char *c = new char;
+     return 0;
+    }"
+    HAVE_CXX_NEW
+)
+
 CHECK_CXX_SOURCE_COMPILES("
     #undef inline
     #if !defined(SCO) && !defined(__osf__) && !defined(_REENTRANT)