@@ -1324,19 +1324,13 @@
 ])
 
 AC_CHECK_HEADERS(sys/utsname.h)
 AC_CHECK_FUNCS(uname)
 
-case "$host_os" in
-	amigaos*)
-		;;
-	*)
-		AC_CHECK_FUNC(pipe, [
-			AC_DEFINE(OF_HAVE_PIPE, 1, [Whether we have pipe()])
-		])
-		;;
-esac
+AC_CHECK_FUNC(pipe, [
+	AC_DEFINE(OF_HAVE_PIPE, 1, [Whether we have pipe()])
+])
 
 AC_ARG_ENABLE(sockets,
 	AS_HELP_STRING([--disable-sockets], [disable socket support]))
 AS_IF([test x"$enable_sockets" != x"no"], [
 	AC_DEFINE(OF_HAVE_SOCKETS, 1, [Whether we have sockets])