Re: [Qemu-devel] [FreeBSD] Build Failure, qemu-char.c

[Sean Bruno <sbruno@freebsd.org>]

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On 01/22/16 09:02, Daniel P. Berrange wrote:
> On Fri, Jan 22, 2016 at 08:52:36AM -0800, Sean Bruno wrote:
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>> 
>> 
>> 
>> On 01/22/16 08:47, Peter Maydell wrote:
>> 
>>> This one is just straightforwardly BSD-only code that hasn't
>>> been compile-tested.
>>> 
>>>> qemu-char.c:4265:36: warning: incompatible pointer types
>>>> passing 'ChardevCommon *' (aka 'struct ChardevCommon *') to
>>>> parameter of type 'ChardevBackend *' (aka 'struct
>>>> ChardevBackend *') [-Wincompatible-pointer-types] return
>>>> qemu_chr_open_pp_fd(fd, common, errp); ^~~~~~
>>>> qemu-char.c:1838:61: note: passing argument to parameter
>>>> 'backend' here ChardevBackend *backend,
>>> 
>>> This one looks like it ought to build on Linux so you're
>>> probably right about it being a clang-only thing. (We do build
>>> with clang on OSX but I think there the CHARDEV_PARPORT code is
>>> not compiled in.)
>>> 
>>> thanks -- PMM
>>> 
>> 
>> Yeah, this is smack in the middle of #ifdef (random BSD) here.
>> It looks like a simple copy/paste error where "common" should
>> have been "backend".  Fixes the build failure, but still emits a
>> cast warning. I think this is the intent of the changes however.
>> 
>> index e133f4f..73eb10f 100644 - --- a/qemu-char.c +++
>> b/qemu-char.c @@ -1840,7 +1840,7 @@ static CharDriverState
>> *qemu_chr_open_pp_fd(int fd, { CharDriverState *chr;
>> 
>> - -    chr = qemu_chr_alloc(common, errp); +    chr =
>> qemu_chr_alloc(backend, errp); if (!chr) { return NULL; }
> 
> Close, but you need to change the type of the parameter too. Can
> you test this for me
> 
> diff --git a/qemu-char.c b/qemu-char.c index e133f4f..aa2e660
> 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -1835,12 +1835,12 @@
> static int pp_ioctl(CharDriverState *chr, int cmd, void *arg) }
> 
> static CharDriverState *qemu_chr_open_pp_fd(int fd, -
> ChardevBackend *backend, +
> ChardevCommon *backend, Error **errp) { CharDriverState *chr;
> 
> -    chr = qemu_chr_alloc(common, errp); +    chr =
> qemu_chr_alloc(backend, errp); if (!chr) { return NULL; }
> 
> 
> If it solves it, i'll send a patch formally
> 
> 
> Regards, Daniel
> 

Yep, confirmed working/compiling with no warning.  Thanks!

sean
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