MonitorWare Knowledge Base

Hi,

I built 4.2.0 on CentOS 5.3 with gcc 4.1.2 and noticed the following warning in the compiler output. Should I be worried?

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atomic.h:57:3: warning: #warning "atomic builtins not available, using nul operations - rsyslogd will probably be racy!"


Thanks,
Ken

• Custom written rsyslog.conf?
• Maintenance Contract?
• Installation support?

yes, definitely, it'll crash under heavy load (at random). In the next release, I have changed it that it does not even compile without atomics. However, gcc 4.1.x should include support for atomic operations, so I wonder why it is not enabled. Maybe we should evaluate configure's log in depth...

OK, I figured it out... somehow the build was incorrectly assuming an i386 target. Apparently the atomic built-ins are not supported for i386 (we need 486 or above). So if I use the following configure command the warning goes away.

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CFLAGS=-march=i686 ./configure

Ken

ahh, good to know. I should probably emit this together with the warning message.