[jira] Updated: (TS-515) eventfd availability not correctly determined on older linux kernels

["Marcus Clyne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TS-515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marcus Clyne updated TS-515:
----------------------------

    Priority: Minor  (was: Blocker)

I changed the priority from blocker to minor because I see that the ./configure option --disable-eventfd can override this issue, but it should still probably be fixed for automatic detection.

> eventfd availability not correctly determined on older linux kernels
> --------------------------------------------------------------------
>
>                 Key: TS-515
>                 URL: https://issues.apache.org/jira/browse/TS-515
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: Build
>    Affects Versions: 2.1.3
>         Environment: Debian Linux VPS, uname -a : 2.6.18-194.17.1.el5.028stab070.7 #1 SMP Fri Oct 1 14:17:14 MSD 2010 i686 GNU/Linux
>            Reporter: Marcus Clyne
>            Priority: Minor
>
> It appears that the macro ATS_HAS_EVENTFD is not correctly determined in some instances.
> When compiling v 2.1.3 on the above environment, I get :
> ...
> UnixEThread.cc:33:25: error: sys/eventfd.h: No such file or directory
> mv -f .deps/Thread.Tpo .deps/Thread.Po
> g++ -DHAVE_CONFIG_H  -I. -I../../libinktomi++  -I../../librecords -D_LARGEFILE64_SOURCE=1 -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D_REENTRANT -Dlinux -I/usr/include/tcl8.4  -march=i586 -g -pipe -Wall -Werror -O3 -feliminate-unused-debug-symbols -fno-strict-aliasing -Wno-invalid-offsetof -MT UnixEvent.o -MD -MP -MF .deps/UnixEvent.Tpo -c -o UnixEvent.o UnixEvent.cc
> UnixEThread.cc: In constructor 'EThread::EThread(ThreadType, int)':
> UnixEThread.cc:76: error: 'eventfd' was not declared in this scope
> make[2]: *** [UnixEThread.o] Error 1
> ...
> According to http://perkamon.alioth.debian.org/online/man2/eventfd.2.php eventfd() is available in Linux kernels >= 2.6.22, so I am assuming in a 2.6.18 kernel, ATS_HAS_EVENTFD  should not be set, but it is.  I'm also assuming this is a ./configure issue.

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