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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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Eric Blake 3cbd3b8e3a maint: detect VPATH builds when checking for gnulib update 
I accidentally typed 'make' in the srcdir of a VPATH build, and
was surprised to see this:

$ make
/bin/sh: s/^[ +-]//;s/ .*//: No such file or directory
INFO: gnulib update required; running ./autogen.sh first
make: -n: Command not found
./autogen.sh
I am going to run ./configure with no arguments - if you wish
to pass any to it, please specify them on the ./autogen.sh command line.
running bootstrap...
./bootstrap: Bootstrapping from checked-out libvirt sources...
./bootstrap: getting gnulib files...

Oops - we're trying to execute some fairly bogus command names,
and then trying to configure in-tree (which breaks all existing
VPATH builds, since automake refuses to do a VPATH build if it
detects an in-tree configure).  The third line (executing "-n")
is fixed by updating to the latest gnulib; the rest of the problem
is fixed by copying the same filtering in our cfg.mk as what
gnulib just added, so that we avoid any $(shell) invocations which
in turn depend on variables that are only populated by a working
Makefile.  With that in place, we are back to the much nicer:

$ make
There seems to be no Makefile in this directory.
You must run ./configure before running 'make'.
make: *** [abort-due-to-no-makefile] Error 1

Additionally, although harder to see - there was a trailing space in
the message warning us that autogen would run an in-tree configure.

* .gnulib: Update to latest, in part for maint.mk improvements.
* cfg.mk (_update_required): Don't check for update in
unconfigured directory.
* autogen.sh (no_git): Drop trailing space.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-06-04 16:06:55 -06:00
.gnulib@d55899fd2c maint: detect VPATH builds when checking for gnulib update 2014-06-04 16:06:55 -06:00
build-aux Require spaces around equality comparisons 2014-03-18 11:29:44 +01:00
daemon Don't use AI_ADDRCONFIG when binding to wildcard addresses 2014-06-02 17:12:01 +02:00
docs virCaps: Expose distance between host NUMA nodes 2014-06-04 09:35:55 +02:00
examples Add a new example to illustrate domain migration 2014-04-30 14:29:07 +01:00
gnulib maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
include Introduce virDomain{Get,Set}Time APIs 2014-05-15 16:15:54 +02:00
m4 virnuma: Check for numa_bitmask_isbitset presence 2014-06-04 16:06:51 +02:00
po Add helper program to create custom leases 2014-06-02 11:45:10 +01:00
src virnuma: Check for numa_bitmask_isbitset presence 2014-06-04 16:06:51 +02:00
tests virCaps: Expose distance between host NUMA nodes 2014-06-04 09:35:55 +02:00
tools virsh-nodedev: Avoid spurious errors 2014-06-02 18:09:09 +02:00
.ctags maint: Make ctags work out of the box 2013-07-18 08:47:21 +02:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore Add a new example to illustrate domain migration 2014-04-30 14:29:07 +01:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
AUTHORS.in Add Roman Bogorodskiy to the committers list 2014-02-20 20:51:08 +04:00
autobuild.sh Disable libvirtd by default when building on Win32 2014-04-29 11:30:32 +01:00
autogen.sh maint: detect VPATH builds when checking for gnulib update 2014-06-04 16:06:55 -06:00
bootstrap maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
bootstrap.conf Add helpers for getting env vars in a setuid environment 2013-10-21 14:03:52 +01:00
cfg.mk maint: detect VPATH builds when checking for gnulib update 2014-06-04 16:06:55 -06:00
ChangeLog-old Fix typos in src/* 2014-04-21 16:49:08 -06:00
config-post.h build: fix build of virt-login-shell on systems with older gnutls 2013-10-22 09:41:50 -06:00
configure.ac Bump version to 1.2.6 for new dev cycle 2014-06-02 09:53:30 +08:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
HACKING Add a rule for indenting labels 2014-03-25 14:58:41 +01:00
libvirt.pc.in Add missing 'libvirt_lxc_api' variable in pkg-config file 2013-09-04 14:52:40 +01:00
libvirt.spec.in Add helper program to create custom leases 2014-06-02 11:45:10 +01:00
Makefile.am Add a new example to illustrate domain migration 2014-04-30 14:29:07 +01:00
Makefile.nonreentrant maint: use LGPL correctly 2013-05-20 14:03:48 -06:00
mingw-libvirt.spec.in conf: create common storage RNG grammar file 2014-04-14 07:07:01 -06:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking docs: update README-hacking 2014-05-06 16:20:24 -06:00
run.in Use virFileFindResource to locate virtlockd daemon 2014-04-28 13:30:41 +01:00
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>