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When gcc atomic intrinsics are not available (such as on RHEL 5 with gcc 4.1.2), we were getting link errors due to multiple definitions: ./.libs/libvirt_util.a(libvirt_util_la-virobject.o): In function `virAtomicIntXor': /home/dummy/l,ibvirt/src/util/viratomoic.h:404: multiple definition of `virAtomicIntXor' ./.libs/libvirt_util.a(libvirt_util_la-viratomic.o):/home/dummy/libvirt/src/util/viratomic.h:404: first defined here Solve this by conditionally marking the functions static (the condition avoids falling foul of gcc warnings about unused static function declarations). * src/util/viratomic.h: When not using gcc intrinsics, use static functions to avoid linker errors on duplicate functions.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>