Deprecate lnat, and use StgWord instead

lnat was originally "long unsigned int" but we were using it when we
wanted a 64-bit type on a 64-bit machine.  This broke on Windows x64,
where long == int == 32 bits.  Using types of unspecified size is bad,
but what we really wanted was a type with N bits on an N-bit machine.
StgWord is exactly that.

lnat was mentioned in some APIs that clients might be using
(e.g. StackOverflowHook()), so we leave it defined but with a comment
to say that it's deprecated.

1 files changed, 1 insertions, 1 deletions

diff --git a/rts/hooks/StackOverflow.c b/rts/hooks/StackOverflow.c
index fe8a059b7f..6a58bb8864 100644
--- a/rts/hooks/StackOverflow.c
+++ b/rts/hooks/StackOverflow.c
@@ -10,7 +10,7 @@
 #include <stdio.h>
 
 void
-StackOverflowHook (lnat stack_size)    /* in bytes */
+StackOverflowHook (W_ stack_size)    /* in bytes */
 {
     fprintf(stderr, "Stack space overflow: current size %" FMT_SizeT " bytes.\nUse `+RTS -Ksize -RTS' to increase it.\n", stack_size);
 }