Here's one of those CHECK macros expanded
typedef struct { char slot1; char slot2; } char_helper; extern int (*
verify_function40 (void)) [(! !sizeof (struct { unsigned int
verify_error_if_negative_size__: (((size_t)__INTADDR__struct { char
__slot1; char __slot2; } *)0)-__slot2))) ==
((size_t)__INTADDR__char_helper *)0)-slot2 ? 1 : -1; }))]; const int
char_slot_alignment = ((size_t)__INTADDR__struct { char __slot1; char
__slot2; } *)0)-__slot2))); const int char_type_alignment =
((size_t)__INTADDR__struct { char __slot1; char __slot2; }
*)0)-__slot2)));
Seem like the bit filed it complains about starts with the
unsigned int verify_error_if_negative_size__: ...
looks like
(((size_t)__INTADDR__struct { char __slot1; char __slot2; }
*)0)-__slot2))) == ((size_t)__INTADDR__char_helper *)0)-slot2 ? 1 :
-1;
Goes negative (-1), because
((size_t)__INTADDR__struct { char __slot1; char __slot2; } *)0)-__slot2)))
Is not equal to
((size_t)__INTADDR__char_helper *)0)-slot2)))
do you see why, resp. what's wrong here?
-Original Message-
From: Bruno Haible [mailto:br...@clisp.org]
Sent: Thursday, December 23, 2010 1:36 PM
To: Joachim Schmitz
Cc: bug-gnulib@gnu.org
Subject: Re: porting alignof to HP-NonStop
Joachim Schmitz wrote:
During compile of gltests:
Something very weird errors in test-allignof.c:
source='test-alignof.c' object='test-alignof.o' libtool=no
DEPDIR=.deps depmode=none /bin/sh ./../build-aux/depcomp cc
-DHAVE_CONFIG_H -I. -DGNULIB_STRICT_CHECKING=1 -I. -I. -I.. -I./..
-I../gllib -I./../gllib -I/usr/local/include -g -Wnowarn -c -o
test-alignof.o test-alignof.c
CHECK (char)
^
/usr/local/Floss/gnulib/testdir-posix/gltests/test-alignof.c, line 40:
error(197):
invalid size for bit field
...
This looks pretty weird:
alignof_slot (char) and offsetof (char_helper, slot2) should be different??
Where alignof_slot (char) is defined as
offsetof (struct { char __slot1; char __slot2; }, __slot2) and char_helper is
defined through
typedef struct { char slot1; char slot2; } char_helper;
The only differences between the left-hand side and the right-hand side are the
names of the struct fields, and the use of 'typedef'.
You need to look at the preprocessed output (cc -E) of test-alignof.c and trim
it down to produce a minimal test case.
Bruno
