The idea of userland using <asm/atomic.h> has our kernel hackers all bent

out of shape, so don't do it.  Suppressing this has another benefit too,

which is we avoid the 4-vs-8-byte problem in BDB that formerly required

mysql-threads.patch.

--- mysql-5.0.21/configure.in~	2006-05-10 14:07:51 +0400

+++ mysql-5.0.21/configure.in	2006-05-10 14:13:42 +0400

@@ -811,47 +811,6 @@ struct request_info *req;

 AC_SUBST(WRAPLIBS)

 if test "$TARGET_LINUX" = "true"; then

-  AC_MSG_CHECKING([for atomic operations])

-

-  AC_LANG_SAVE

-  AC_LANG_CPLUSPLUS

-

-  atom_ops=

-  AC_TRY_RUN([

-#include <asm/atomic.h>

-int main()

-{

-  atomic_t v;

-

-  atomic_set(&v, 23);

-  atomic_add(5, &v);

-  return atomic_read(&v) == 28 ? 0 : -1;

-}

-  ],

-  [AC_DEFINE([HAVE_ATOMIC_ADD], [1],

-             [atomic_add() from <asm/atomic.h> (Linux only)])

-   atom_ops="${atom_ops}atomic_add "],

-  )

-  AC_TRY_RUN([

-#include <asm/atomic.h>

-int main()

-{

-  atomic_t v;

-

-  atomic_set(&v, 23);

-  atomic_sub(5, &v);

-  return atomic_read(&v) == 18 ? 0 : -1;

-}

-  ],

-  [AC_DEFINE([HAVE_ATOMIC_SUB], [1],

-             [atomic_sub() from <asm/atomic.h> (Linux only)])

-   atom_ops="${atom_ops}atomic_sub "],

-  )

-

-  if test -z "$atom_ops"; then atom_ops="no"; fi

-  AC_MSG_RESULT($atom_ops)

-

-  AC_LANG_RESTORE

   AC_ARG_WITH(pstack,

     [  --with-pstack           Use the pstack backtrace library],