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Eric Blake c047f54749 build: place attributes in correct location
Ever since commit eefb881, ATTRIBUTE_NONNULL has normally been a
no-op under gcc (since it tends to cause more bugs than it cures
given gcc's current lame implementation of the attribute).  However,
the macro is still useful to Coverity and other static-analysis
tools, but only if we use it correctly.  Coverity follows gcc's lead
in accepting function declarations with attributes at the end, but
function bodies must attach attributes to the return type.  That is,
these are valid:

void foo(void *arg) ATTRIBUTE_NONNULL(1);
void ATTRIBUTE_NONNULL(1) foo(void *arg);
void ATTRIBUTE_NONNULL(1) foo(void *arg) {}

but this is not:

void foo(void *arg) ATTRIBUTE_NONNULL(1) {}

even though you don't get a compile failure until you do static
analysis.  Bug introduced in commit 80533ca, with these symptoms:

nodeinfo.c:206: error: expected ',' or ';' before '{' token
cc1: warning: unrecognized command line option "-Wno-suggest-attribute=const"
cc1: warning: unrecognized command line option "-Wno-suggest-attribute=pure"
make[3]: *** [libvirt_driver_la-nodeinfo.lo] Error 1

* src/nodeinfo.c (virNodeParseNode): Fix syntax error when
non-null attribute is in use.
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         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>
Description
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
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