How about if we install the following coreutils patch?
It should catch the more-general problem, if I understand it aright.
My understanding is that the following little C program:
#include <stdbool.h>
#include <assert.h>
int main (void) {
assert (-1 - (_Bool) 0 < 0);
assert (-1 - (bool) 0 < 0);
return 0;
}
will have an assertion failure with the buggy IBM compiler.
If it doesn't, we'd need to modify the stdbool.m4 part of this fix.
2005-10-06 Paul Eggert <[EMAIL PROTECTED]>
* m4/stdbool.m4 (AC_HEADER_STDBOOL): Check that bool
promotes to int, not unsigned int, to catch the AIX 5.3
compiler bug.
* src/sort.c (sortlines_temp): Undo previous change, since
the above should catch it.
Index: m4/stdbool.m4
===================================================================
RCS file: /fetish/cu/m4/stdbool.m4,v
retrieving revision 1.4
diff -p -u -r1.4 stdbool.m4
--- m4/stdbool.m4 22 Jan 2005 06:25:53 -0000 1.4
+++ m4/stdbool.m4 6 Oct 2005 08:02:20 -0000
@@ -1,6 +1,6 @@
# Check for stdbool.h that conforms to C99.
-dnl Copyright (C) 2002-2004 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2005 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
@@ -70,10 +70,11 @@ AC_DEFUN([AC_HEADER_STDBOOL],
enum { j = false, k = true, l = false * true, m = true * 256 };
_Bool n[m];
char o[sizeof n == m * sizeof n[0] ? 1 : -1];
+ char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
],
[
return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !j + !k + !l
- + !m + !n + !o);
+ + !m + !n + !o + !p);
],
[ac_cv_header_stdbool_h=yes],
[ac_cv_header_stdbool_h=no])])
Index: src/sort.c
===================================================================
RCS file: /fetish/cu/src/sort.c,v
retrieving revision 1.326
diff -p -u -r1.326 sort.c
--- src/sort.c 5 Oct 2005 18:56:29 -0000 1.326
+++ src/sort.c 6 Oct 2005 08:02:21 -0000
@@ -1720,9 +1720,7 @@ sortlines_temp (struct line *lines, size
{
if (nlines == 2)
{
- /* Declare `swap' as int, not bool, to work around a bug in
- an AIX 5.3 compiler in 64-bit mode. */
- int swap = (0 < compare (&lines[-1], &lines[-2]));
+ bool swap = (0 < compare (&lines[-1], &lines[-2]));
temp[-1] = lines[-1 - swap];
temp[-2] = lines[-2 + swap];
}
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