[TS-515] eventfd availability not correctly determined on older linux kernels

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.1.3
• Fix Version/s: 2.1.5
• Component/s: Build

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

• Assignee: Leif Hedstrom
• Reporter: Marcus Clyne
• Created: 08/Nov/10 12:01
• Updated: 25/Jan/11 05:07
• Resolved: 15/Dec/10 00:02

Description

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.