-dnl ---------- usleep ----------
-dnl --- stolen from guile configure ---
-dnl --- FIXME: /usr/include/unistd.h can't be right?
-
-### On some systems usleep has no return value. If it does have one,
-### we'd like to return it; otherwise, we'll fake it.
-AC_CACHE_CHECK([return type of usleep], cv_func_usleep_return_type,
- [AC_EGREP_HEADER(changequote(<, >)<void[ ]+usleep>changequote([, ]),
- /usr/include/unistd.h,
- [cv_func_usleep_return_type=void],
- [cv_func_usleep_return_type=int])])
-case "$cv_func_usleep_return_type" in
- "void" )
- AC_DEFINE([USLEEP_RETURNS_VOID], [1], [Define if the system headers declare usleep to return void.])
- ;;
-esac
-