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# Check whether FUNCTION is declared in INCLUDES
# and whether rtems_stub_FUNCTION or FUNCTION is supplied.
# RTEMS_CHECK_FUNC(FUNCTION[,INCLUDES])
AC_DEFUN([RTEMS_CHECK_FUNC],
[AC_REQUIRE([RTEMS_CHECK_NEWLIB])
AC_CHECK_DECLS([$1],,,[$2])
AC_CACHE_CHECK([for $1],[ac_cv_$1],[
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[$2]],[[rtems_stub_$1()]])],
[ac_cv_$1="stub"],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[$2]],[[$1()]])],
[ac_cv_$1="yes"],
[ac_cv_$1="no"])
])
])
AS_IF([test "$ac_cv_$1" = yes],
[AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_]$1),[1],[Define to 1 if you have the `$1' function.])])
])
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