Re: [ntp:questions] questions] Cross-compiling NTP for the Raspberry Pi
On Friday, February 6, 2015 at 3:10:01 PM UTC+8, Harlan Stenn wrote: > This is a test from libevent, because it needs to know if the select() > function will yield in threads. I say that as if I know what I'm > talking about, but it's "close enough". > > We can run a test and figure out whether or not select() will yield, but > we cannot run a test in a cross-compile environment, so in that case we > expect the person running the build to know how the target behaves. > > Personally, I think that specific autoconf macro, > > sntp/libevent/m4/openldap-thread-check.m4 > > is not well-written and it seems to have some problems. But it's also > 683 lines of autoconf macro, and it's not indented using a style I find > easy to read, so I haven't been able to clean it up yet. > > H OK, thank you so much. Best wishes. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] questions] Cross-compiling NTP for the Raspberry Pi
This is a test from libevent, because it needs to know if the select() function will yield in threads. I say that as if I know what I'm talking about, but it's "close enough". We can run a test and figure out whether or not select() will yield, but we cannot run a test in a cross-compile environment, so in that case we expect the person running the build to know how the target behaves. Personally, I think that specific autoconf macro, sntp/libevent/m4/openldap-thread-check.m4 is not well-written and it seems to have some problems. But it's also 683 lines of autoconf macro, and it's not indented using a style I find easy to read, so I haven't been able to clean it up yet. H ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] questions] Cross-compiling NTP for the Raspberry Pi
On Wednesday, February 19, 2014 at 4:34:59 AM UTC+8, David J Taylor wrote: > From: Charles Swiger > > Yes, you need to add --with-yielding_select=yes. > (Or no, depending on what select() does on the target platform.) > > ./configure normally runs a set of tests to figure all of this stuff out, > but those tests > need to run on the target and not on the build platform when > cross-compiling. If you > don't already know the right answers, run ./configure on the target platform > and use > those results when cross-compiling from a faster platform. > > Regards, > -Chuck > > > Just what I needed to know, Chuck. Running .\configure on the Raspberry Pi, > and saving the output shows three separate lines saying: > > checking if select yields when using pthreads... yes > > so I guess I need "yes". Quite why configure needs to check this three > times, on an already very slow RPi PC, is a mystery! > > [sorry for non-standard quoting] > > Cheers, > David > -- > SatSignal Software - Quality software written to your requirements > Web: http://www.satsignal.eu > Email: david-tay...@blueyonder.co.uk Hi Chuck, I met this problem too. When I add the --with-yielding_select=yes, the build succeeds, but I don't quite understand what the "--with-yielding_select=yes" is used for. Also, when I add --with-yielding_select=no or --with-yielding_select=manual, the build still passes. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] questions] Cross-compiling NTP for the Raspberry Pi
From: Charles Swiger Yes, you need to add --with-yielding_select=yes. (Or no, depending on what select() does on the target platform.) ./configure normally runs a set of tests to figure all of this stuff out, but those tests need to run on the target and not on the build platform when cross-compiling. If you don't already know the right answers, run ./configure on the target platform and use those results when cross-compiling from a faster platform. Regards, -Chuck Just what I needed to know, Chuck. Running .\configure on the Raspberry Pi, and saving the output shows three separate lines saying: checking if select yields when using pthreads... yes so I guess I need "yes". Quite why configure needs to check this three times, on an already very slow RPi PC, is a mystery! [sorry for non-standard quoting] Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
