Re: Fwd: Debug strategy for musl Postgres?

Hi,

On 2014-04-13 16:08:00 -0400, John Mudd wrote:
> I built Postgres 9.3.4 from source on top of the musl C library,
> http://www.musl-libc.org/
> I also built zlib, bzip2, ncurses, openssl, readline and Python using musl
> as a foundation for Postgres.
>
> I'm using musl to increase the portability of the Postgres binary. I build
> on Ubuntu 13.10 but will runs on older Linux boxes.
>
> So far I get better results with the musl Postgres built on modern Ubuntu
> and running on an old kernel than building Postgres directly on the old
> Linux using standard C library. But the musl Postgres is still not working
> fully. I'm not getting responses from the server.

I tend to think that this is more a matter for the musl devs than
postgres. Postgres works on a fair numbers of libcs and musl is pretty
new and rough around the edges.

> clock_gettime(0, 0xbfffa5a8) = -1 ENOSYS (Function not implemented)

This looks suspicious.

> gettimeofday(NULL, {300, 0}) = 0
> poll([{fd=3, events=POLLOUT|POLLERR, revents=POLLOUT}], 1, 3000) = 1
> sendto(3, "\0\0\0?\0\3\0\0user\0jmudd\0database\0jmud"..., 63, 0x4000,
> NULL, 0) = 63
>
> clock_gettime(0, 0xbfffa5a8) = -1 ENOSYS (Function not
> implemented)
> gettimeofday(NULL, {300, 0}) = 0
> poll([{fd=3, events=POLLIN|POLLERR}], 1, 3000) = 0

Here a poll didn't return anything. You'll likely have to look at
the server side.

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services