dnl Assume that when the main function exists, all the others,
dnl except posix_spawnattr_{get,set}sched*, are available as well.
dnl AC_CHECK_FUNCS_ONCE([posix_spawnp])
dnl Assume that when the main function exists, all the others,
dnl except posix_spawnattr_{get,set}sched*, are available as well.
dnl AC_CHECK_FUNCS_ONCE([posix_spawnp])