Date: Tue, 17 Jun 1997 03:40:01 -0700 (PDT) From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs Subject: Re: bin/3884: stdarg.h fails for data types < 4 bytes Message-ID: <199706171040.DAA07953@hub.freebsd.org>
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The following reply was made to PR bin/3884; it has been noted by GNATS.
From: Bruce Evans <bde@zeta.org.au>
To: arnej@mail.math.ntnu.no, arnej@math.ntnu.no, bde@zeta.org.au,
FreeBSD-gnats-submit@FreeBSD.ORG
Cc: Subject: Re: bin/3884: stdarg.h fails for data types < 4 bytes
Date: Tue, 17 Jun 1997 20:20:32 +1000
>> >>How-To-Repeat:
>> >
>> > Inspect <stdarg.h>, or compile and run the following test
>> > program, gotten from c-torture.
>>
>> This program does not conform to standard C.
>
>If it used short, I would agree with you. However, it uses a struct,
>and structs doesn't promote at all. Therefore, the program is
>conforming (maybe even strictly conforming) Ansi C and must work.
You are right. I should have read your example more carefully.
Your patch can be improved by fixing the KERNEL case too and renaming
__va_promote - there is no way to determine the promoted sizes without a
builtin, and the args may have additional padding anyway, so __va_promote
is a confusing name. The corresponding macro is named __va_rounded_size
in gcc/ginclude/stdarg.h and __va_size in NetBSD.
Bruce
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