dnl Check if the compiler is configured for setjmp/longjmp exceptions.
AC_DEFUN([GCC_CHECK_SJLJ_EXCEPTIONS],
 [AC_CACHE_CHECK([whether the compiler is configured for setjmp/longjmp exceptions],
   ac_cv_sjlj_exceptions,
   [AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM(
       [[#ifdef __USING_SJLJ_EXCEPTIONS__
         this will fail
         #endif]],
       [[int i;]])],
     [ac_cv_sjlj_exceptions=no],
     [ac_cv_sjlj_exceptions=yes])])])