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OpenBSD ships with gcc 4.2.1, which annoyingly treats all format strings as though they were also attribute((nonnull)). The two concepts are orthogonal, though, as evidenced by the number of spurious warnings it generates on uses where we know that virReportError specifically handles NULL instead of a format string; worse, since we now force -Werror on git builds, it prevents development builds on OpenBSD. I hate to do this, as it disables ALL format checking on older gcc, and therefore misses out on some useful checks (code that happened to compile on Linux may still have type mismatches when compiled on other platforms, as evidenced by the number of times I have fixed formatting mismatches for uid_t as found by warnings on Cygwin), but I don't see any other way to keep -Werror alive and still compile on OpenBSD. A more invasive change would be to make virReportError() mark its format attribute as nonnull, and fix (a lot of) fallout; we may end up doing that anyways as part of danpb's error refactoring improvements, but not today. * src/internal.h (ATTRIBUTE_FMT_PRINTF): Use preferred spellings. * m4/virt-compile-warnings.m4 (-Wformat): Disable on older gcc.
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>