1 2AC_DEFUN([rk_LIBDISPATCH],[ 3 4AC_CHECK_HEADERS([dispatch/dispatch.h]) 5 6AC_FIND_FUNC_NO_LIBS(dispatch_async_f, dispatch, 7[#ifdef HAVE_DISPATCH_DISPATCH_H 8#include <dispatch/dispatch.h> 9#endif],[0,0,0]) 10 11if test "$ac_cv_func_dispatch_async_f" = yes ; then 12 AC_DEFINE([HAVE_GCD], 1, [Define if os support gcd.]) 13 libdispatch=yes 14else 15 libdispatch=no 16fi 17 18AM_CONDITIONAL(have_gcd, test "$libdispatch" = yes) 19 20])