1  /* { dg-do compile } */
       2  /* { dg-options "-fmacro-prefix-map==MACRO-PREFIX" } */
       3  
       4  #pragma message "FILE starts with " __FILE__       /* { dg-message "FILE starts with MACRO-PREFIX" } */
       5  #pragma message "BASE_FILE starts with " __BASE_FILE__  /* { dg-message "BASE_FILE starts with MACRO-PREFIX" } */