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dnl
AC_DEFUN([RTEMS_CHECK_ATOMIC],
[dnl
AC_REQUIRE([RTEMS_CANONICAL_TARGET_CPU])dnl
AC_CACHE_CHECK([whether CPU supports atomic operations],
[rtems_cv_ATOMIC],[
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#include <stdatomic.h>]],
[[atomic_uint_fast32_t t; uint_fast32_t m = 1;
atomic_init(&t, 0);
atomic_store( &t, 1 );
atomic_exchange( &t, 2 );
atomic_compare_exchange_strong( &t, &m, 2);
atomic_fetch_add( &t, 3 );]])],
[rtems_cv_ATOMIC="yes"],
[rtems_cv_ATOMIC="no"])
])
])
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