Re: [HACKERS] powerpc(32) point/polygon regression failures on Debian Jessie

2017-02-21 Thread Christoph Berg
Re: To Tom Lane 2017-02-20 <20170220161556.5ukosuj5o572b...@msg.credativ.de> > I was compiling the program on jessie and on sid, and running the > jessie binary on sid made it output the same as the sid binary, so the > difference isn't in the binary, but in some system library. Fwiw, the problem

Re: [HACKERS] powerpc(32) point/polygon regression failures on Debian Jessie

2017-02-20 Thread Christoph Berg
Re: Tom Lane 2017-02-20 <13825.1487607...@sss.pgh.pa.us> > Still, it'd be worth comparing the assembly code for your test program. I was compiling the program on jessie and on sid, and running the jessie binary on sid made it output the same as the sid binary, so the difference isn't in the

Re: [HACKERS] powerpc(32) point/polygon regression failures on Debian Jessie

2017-02-20 Thread Tom Lane
Christoph Berg writes: > Re: Tom Lane 2017-02-20 <30737.1487598...@sss.pgh.pa.us> >> Hmph. We haven't touched that code in awhile, and certainly not in the >> 9.4.x branch. I'd have to agree that this must be a toolchain change. > FYI, in the meantime we could

Re: [HACKERS] powerpc(32) point/polygon regression failures on Debian Jessie

2017-02-20 Thread Christoph Berg
Re: Tom Lane 2017-02-20 <30737.1487598...@sss.pgh.pa.us> > Hmph. We haven't touched that code in awhile, and certainly not in the > 9.4.x branch. I'd have to agree that this must be a toolchain change. FYI, in the meantime we could indeed trace it back to an libc issue on Jessie: $ cat sqrt.c

Re: [HACKERS] powerpc(32) point/polygon regression failures on Debian Jessie

2017-02-20 Thread Tom Lane
Christoph Berg writes: > The point/polygon regression tests have started to fail on 32-bit > powerpc on Debian Jessie. So far I could reproduce the problem with > PostgreSQL 9.4.10+11 and 9.6.1, on several different machines. Debian > unstable is unaffected. Hmph. We

[HACKERS] powerpc(32) point/polygon regression failures on Debian Jessie

2017-02-20 Thread Christoph Berg
The point/polygon regression tests have started to fail on 32-bit powerpc on Debian Jessie. So far I could reproduce the problem with PostgreSQL 9.4.10+11 and 9.6.1, on several different machines. Debian unstable is unaffected. The failure looks like this: