Fixes for Ctrl-G support on carbon, replacing old timeout based polling

with alarm based polling.
mac.c (sys_select): Redo sys_select to use alarm-based
polling instead of 1 sec timeouts (like solaris).
macterm.c (x_make_frame_visible): Comment in polling on
frame creation.
keyboard.c: Undef SIGIO on Carbon
atimer.c (alarm_signal_handler): Call alarm handlers after
scheduling.
eval.c (Feval): Remove quit_char test
process.c (wait_reading_process_input): Remove clearing
stdin for select call on process input

1 files changed, 4 insertions, 3 deletions

diff --git a/src/process.c b/src/process.c
index 4c47fc0e92a..aad36b904b5 100644
--- a/src/process.c
+++ b/src/process.c
@@ -4190,12 +4190,13 @@ wait_reading_process_input (time_limit, microsecs, read_kbd, do_display)
           SELECT_TYPE Atemp, Ctemp;
 
           Atemp = input_wait_mask;
-#ifdef MAC_OSX
-          /* On Mac OS X, the SELECT system call always says input is
+#if 0
+          /* On Mac OS X 10.0, the SELECT system call always says input is
              present (for reading) at stdin, even when none is.  This
              causes the call to SELECT below to return 1 and
              status_notify not to be called.  As a result output of
-             subprocesses are incorrectly discarded.  */
+             subprocesses are incorrectly discarded.  
+          */
           FD_CLR (0, &Atemp);
 #endif
           Ctemp = connect_wait_mask;