compiler info in kernel identification string

Dimitry Andric dim at
Thu Nov 15 23:09:24 UTC 2012

On 2012-11-14 16:38, Ian Lepore wrote:
> On Wed, 2012-11-14 at 10:25 +0100, Dimitry Andric wrote:
>> That way, you are sure never to lose information.  This also works for
>> gcc from ports (which is the reason for the space after 'version' in the
>> grep command):
>>     $ gcc47 -v 2>&1 | grep 'version '
>>     gcc version 4.7.3 20120929 (prerelease) (FreeBSD Ports Collection)
>> I realize this is a bit long, but it is better to have complete than
>> stripped information.
> Rather than just taking whatever the compiler emits, the proposed patch
> seems to be carefully crafted to avoid breaking existing 3rd party tools
> which parse uname output based on the location of whitespace.  I'm not
> sure how important that is given that the uname manpage doesn't document
> the output format as if it were somehow rigidly specified.

I can see where you're coming from, but I also think it is very fragile
to depend on parsing such information from uname.  If you do so, you
must be prepared to accept wonky input, otherwise, just don't do it. :)

And as I remarked in another reply, now that I have thought about it a
bit, I would much rather see this information moved to a sysctl or dmesg
line, than in uname.  With the happy side effect that no existing uname
parsers would be confused!

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