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Re: porting alignof to HP-NonStop

From: Bruno Haible
Subject: Re: porting alignof to HP-NonStop
Date: Thu, 23 Dec 2010 13:36:14 +0100
User-agent: KMail/1.9.9

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.


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