Bug #60171 use of SYS_gettid in stacktrace.c breaks legacy Linux
Submitted: 18 Feb 2011 20:24 Modified: 19 Feb 2011 10:16
Reporter: Todd Rinaldo Email Updates:
Status: Unsupported Impact on me:
None 
Category:MySQL Server: Compiling Severity:S3 (Non-critical)
Version:5.1.55 OS:Linux (pre-RH AS3)
Assigned to: Davi Arnaut CPU Architecture:Any
Tags: Contribution, regression

[18 Feb 2011 20:24] Todd Rinaldo 
Description:
A patch introduced in 5.1.55 makes MySQL uncompilable on Pre-AS3 RHEL systems.

How to repeat:
install RHEL AS3. compile MySQL 5.1.55

Suggested fix:
Will provide suggested patch which checks for SYS_gettid being defined instead of __linux__
[18 Feb 2011 20:28] Todd Rinaldo 
Suggested patch should fix legacy systems

Attachment: SYS_gettid.patch (application/octet-stream, text), 830 bytes.
[18 Feb 2011 20:28] Peter Laursen 
Is it really relevant to support MySQL 5.5 on such antique Operating System?  I think no! But I had a recent discussion wiht the documentation team and docs tell (they were updated) that 'Linux systems with a 2.6.x kernel are supported' (quoted from memory).

Peter
(not a MySQL person)
[18 Feb 2011 20:31] Todd Rinaldo 
5.1 not 5.5
[19 Feb 2011 1:27] Davi Arnaut 
It is pre- or on-AS3?
[19 Feb 2011 3:09] Todd Rinaldo 
Pre-AS3.

We seem to be harping on what linux platforms don't work. I don't get it. The change I'm suggesting simply allows MySQL to support a wider user base. I'm not really clear why that's undesirable to everyone. Especially since the bit of code which doesn't support pre-AS3 is so small. I'd point out that this bit of code  also isn't supported on Windows, BSD, etc. 

*shrug*
[19 Feb 2011 10:16] Davi Arnaut 
The maintainability cost is undesired. We would need to ensure that it works on such platform and on newer ones (plus patch review, testing, etc). We don't want to keep supporting hacks for old platforms forever, sometimes we have to draw a line on the sand -- no special cases for unsupported platforms.