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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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Christophe Fergeau 29d753c8d5 fix xdr detection and use with recent glibc 
glibc 2.13.90 has obsoleted its rpc implementation in favour of
the one provided by the TI-RPC library:

> * The RPC implementation in libc is obsoleted.  Old programs keep working
>   but new programs cannot be linked with the routines in libc anymore.
>   Programs in need of RPC functionality must be linked against TI-RPC.
>   The TI-RPC implemtation is IPv6 enabled and there are other benefits.
>
>   Visible changes of this change include (obviously) the inability to
>   link
>   programs using RPC functions without referencing the TI-RPC library,
>   the
>   removal of the RPC headers from the glibc headers, and the lack of
>   symbols defined in <rpc/netdb.h> when <netdb.h> is installed.
>   Implemented by Ulrich Drepper.
(from glibc NEWS)

Thus with recent glibc, we need to try linking with -ltirpc when looking
for the XDR functions. The daemon also needs to use XDR_CFLAGS to be able
to find the XDR headers stored in /usr/include/tirpc.

When using TI-RPC, there are some warnings about redundant declarations, but
the fix probably belongs in other modules:

/usr/include/tirpc/rpc/rpcent.h:68:13: warning: redundant redeclaration of
'setrpcent' [-Wredundant-decls]
/usr/include/rpc/netdb.h:53:13: note: previous declaration of 'setrpcent'
was here

/usr/include/tirpc/rpc/rpcent.h:69:13: warning: redundant redeclaration of
'endrpcent' [-Wredundant-decls]
/usr/include/rpc/netdb.h:54:13: note: previous declaration of 'endrpcent'
was here

/usr/include/tirpc/rpc/rpc.h:84:12: warning: redundant redeclaration of
'bindresvport' [-Wredundant-decls]
/usr/include/netinet/in.h:440:12: note: previous declaration of
'bindresvport' was here
2011-05-11 14:56:57 -06:00
.gnulib@64a5e38bce maint: avoid a couple of gnulib regressions 2011-05-11 12:03:45 -06:00
daemon fix xdr detection and use with recent glibc 2011-05-11 14:56:57 -06:00
docs docs: avoid double 'the' 2011-05-11 08:18:04 -06:00
examples build: avoid gcc preprocessor extensions 2011-05-11 13:28:50 -06:00
include inject-nmi: Defining the public API 2011-05-10 11:40:51 -06:00
m4 tests: Lower stack usage below 4096 bytes 2011-04-30 19:59:52 +02:00
po build: translate generated strings 2011-05-09 11:51:05 -06:00
python python: Use hardcoded python path in libvirt.py 2011-03-14 12:37:19 +01:00
src build: avoid gcc preprocessor extensions 2011-05-11 13:28:50 -06:00
tests tests: avoid crash when run under gcov 2011-05-11 09:58:35 -06:00
tools inject-nmi: Expose the new API in virsh 2011-05-10 11:40:51 -06:00
.dir-locals.el maint: make spacing in .sh files easier 2011-03-14 21:57:42 -06:00
.gitignore build: Remove all generated RPC files from GIT 2011-05-06 16:22:33 -06:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap build: fix syntax-check failure 2011-04-20 17:17:56 -06:00
AUTHORS Add warning message to XML definition files stored on disk 2011-05-06 16:48:52 +02:00
autobuild.sh Remove the Open Nebula driver 2011-03-28 14:09:11 +01:00
autogen.sh build: avoid problems with autogen.sh runs from tarball 2011-02-12 06:28:28 -07:00
bootstrap maint: avoid a couple of gnulib regressions 2011-05-11 12:03:45 -06:00
bootstrap.conf Pull in gnulib fnmatch module 2011-05-09 16:10:46 +01:00
cfg.mk libvirt,logging: cleanup VIR_XXX0() 2011-05-11 12:41:14 -06:00
ChangeLog-old generate ChangeLog from git logs into distribution tarball 2009-07-08 16:17:51 +02:00
configure.ac fix xdr detection and use with recent glibc 2011-05-11 14:56:57 -06:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING maint: rename virBufferVSprintf to virBufferAsprintf 2011-05-05 13:47:40 -06:00
libvirt.pc.in * libvirt.pc.in: applied patch from Daniel Berrange to fix --cflags 2006-03-24 13:18:12 +00:00
libvirt.spec.in Release of libvirt-0.9.1 2011-05-05 11:25:13 +08:00
Makefile.am Re-add libvirt.spec to tarball to allwo "make rpm" 2011-05-09 14:23:19 +08:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw32-libvirt.spec.in Remove iohelper on Win32 since it is not required 2011-03-31 17:41:51 +01:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

README 

         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>