[PATCH FOR REVIEW]: Fix warning in src/share/vm/adlc/archDesc.cpp

[Christian Thalinger]

Christian Thalinger wrote:
> Andrew John Hughes wrote:
>> 2009/9/4 Paul Hohensee <Paul.Hohensee at sun.com>:
>>> Try a cast to (void).
>>>
>> As I said (or meant to, mental typo), this doesn't fix it.  GCC still complains.
> 
> Yeah, there already were some discussions about this new behavior and I
> personally don't really like it.  When I want to ignore a return value
> the compiler should honor that and go ahead.  Is there a compiler flag
> to turn that behavior off?

Well, looking more closely it's actually a system header attribute that
brings up that warning:

/mnt/builder/icedtea7/openjdk-ecj/hotspot/src/share/vm/adlc/archDesc.cpp:1034:
error: ignoring return value of 'size_t fwrite(const void*, size_t,
size_t, FILE*)', declared with attribute warn_unused_result

And it seems there is no GCC switch to turn that warning off (except
-O0).  Maybe we should check for the written bytes to be the same as
requested:

  assert(count == size, "copyright info truncated");

-- Christian