aio: change to use unix io, not stdio

This changes especially makes buffered I/O work
with non-blocking channels.

- separate read and write buffering
- support for timeout on blocking read
- read/write on same channel in event loop with buffering
- read buffer is the same across read, gets, copyto
- autoflush non-blocking writes via event loop
- copyto can now copy to any filehandle-like command
- add some copyto tests

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 1 insertions, 2 deletions

diff --git a/auto.def b/auto.def
index d9058bf..5531559 100644
--- a/auto.def
+++ b/auto.def
@@ -307,9 +307,8 @@ if {[get-define _FILE_OFFSET_BITS] != 64 || ![cc-check-functions stat64]} {
     cc-check-functions fstat lstat
 } else {
     # But perhaps some 32 bit systems still require explicit use of the 64 bit versions
-    cc-check-functions fstat64 lstat64
+    cc-check-functions fstat64 lstat64 lseek64
 }
-cc-check-functions fseeko ftello
 
 define TCL_LIBRARY [get-define libdir]/jim