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Newer binutils 'ar' has added an option 'D' for deterministic builds, and at least on rawhide, this option is enabled by default. But it conflicts with the 'u' optimization where the linker only modifies libraries based on file timestamps, but can result in different library ordering based on which files were touched last. Thus, it results in some noisy compilation, for every CCLD line: CCLD libvirt_driver_qemu_impl.la ar: `u' modifier ignored since `D' is the default (see `U') Upstream automake has decided that defaulting ARFLAGS to 'cru' is no longer beneficial, and that switching the default to 'cr' will both silence the noise and not penalize modern build systems. https://lists.gnu.org/archive/html/automake-patches/2015-06/msg00000.html But rather than wait for newer automake to propagate to all systems that already have newer binutils, we might as well just use the new default ourselves, even on older platforms. * configure.ac: Default AR[_]FLAGS to 'cr', not 'cru'. Signed-off-by: Eric Blake <eblake@redhat.com>
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>