Commit Graph

234 Commits

Author SHA1 Message Date
Michal Privoznik
68954fb25c virNetServerRun: Notify systemd that we're accepting clients
Systemd does not forget about the cases, where client service needs to
wait for daemon service to initialize and start accepting new clients.
Setting a dependency in client is not enough as systemd doesn't know
when the daemon has initialized itself and started accepting new
clients. However, it offers a mechanism to solve this. The daemon needs
to call a special systemd function by which the daemon tells "I'm ready
to accept new clients". This is exactly what we need with
libvirtd-guests (client) and libvirtd (daemon). So now, with this
change, libvirt-guests.service is invoked not any sooner than
libvirtd.service calls the systemd notify function.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-02-24 10:54:48 +01:00
Roman Bogorodskiy
0eb4a5f4f1 bhyve: add a basic driver
At this point it has a limited functionality and is highly
experimental. Supported domain operations are:

  * define
  * start
  * destroy
  * dumpxml
  * dominfo

It's only possible to have only one disk device and only one
network, which should be of type bridge.
2014-02-19 14:21:50 +00:00
Richard W.M. Jones
fe881ae086 aarch64: Disable -fstack-protector.
I'm using gcc-4.8.2-7.fc21.aarch64 which does not appear to support
this option.
2014-01-01 14:21:21 +00:00
Eric Blake
318ea3cb77 storage: initial support for linking with libgfapi
We support gluster volumes in domain XML, so we also ought to
support them as a storage pool.  Besides, a future patch will
want to take advantage of libgfapi to handle the case of a
gluster device holding qcow2 rather than raw storage, and for
that to work, we need a storage backend that can read gluster
storage volume contents.  This sets up the framework.

Note that the new pool is named 'gluster' to match a
<disk type='network'><source protocol='gluster'> image source
already supported in a <domain>; it does NOT match the
<pool type='netfs'><source><target type='glusterfs'>,
since that uses a FUSE mount to a local file name rather than
a network name.

This and subsequent patches have been tested against glusterfs
3.4.1 (available on Fedora 19); there are likely bugs in older
versions that may prevent decent use of gfapi, so this patch
enforces the minimum version tested.  A future patch may lower
the minimum.  On the other hand, I hit at least two bugs in
3.4.1 that will be fixed in 3.5/3.4.2, where it might be worth
raising the minimum: glfs_readdir is nicer to use than
glfs_readdir_r [1], and glfs_fini should only return failure on
an actual failure [2].

[1] http://lists.gnu.org/archive/html/gluster-devel/2013-10/msg00085.html
[2] http://lists.gnu.org/archive/html/gluster-devel/2013-10/msg00086.html

* configure.ac (WITH_STORAGE_GLUSTER): New conditional.
* m4/virt-gluster.m4: new file.
* libvirt.spec.in (BuildRequires): Support gluster in spec file.
* src/conf/storage_conf.h (VIR_STORAGE_POOL_GLUSTER): New pool
type.
* src/conf/storage_conf.c (poolTypeInfo): Treat similar to
sheepdog and rbd.
(virStoragePoolDefFormat): Don't output target for gluster.
* src/storage/storage_backend_gluster.h: New file.
* src/storage/storage_backend_gluster.c: Likewise.
* po/POTFILES.in: Add new file.
* src/storage/storage_backend.c (backends): Register new type.
* src/Makefile.am (STORAGE_DRIVER_GLUSTER_SOURCES): Build new files.
* src/storage/storage_backend.h (_virStorageBackend): Documet
assumption.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-11-25 11:02:52 -07:00
Daniel P. Berrange
a7a1244a73 Remove python binding
The python binding now lives in

  http://libvirt.org/git/?p=libvirt-python.git

that repo also provides an RPM which is upgrade compatible
with the old libvirt-python sub-RPM.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-11-25 16:08:00 +00:00
Eric Blake
e5f46105a1 build: add configure --without-readline
Make it much easier to test a configuration built without readline
support, by reusing our existing library probe machinery.  It gets
a bit tricky with readline, which does not provide a pkg-config
snippet, and which on some platforms requires one of several
terminal libraries as a prerequiste, but the end result should be
the same default behavior but now with the option to disable things.

* m4/virt-readline.m4 (LIBVIRT_CHECK_READLINE): Simplify by using
LIBVIRT_CHECK_LIB.
* tools/virsh.c: Convert USE_READLINE to WITH_READLINE.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-10-07 08:39:47 -06:00
Eric Blake
d6eac3f377 build: move readline check into its own macro
A future patch will allow disabling readline; doing this in an
isolated file instead of configure.ac will make the task easier.

* configure.ac: Move readline code...
* m4/virt-readline.m4: ...here.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-10-07 08:35:57 -06:00
Eric Blake
21114ce9c2 maint: update to latest gnulib
Since we're about to freeze, it's time to pick up the latest
upstream gnulib.  Among other changes, gnulib now guarantees the
use of some -f flags that we were previously manually adding.

* .gnulib: Update to latest, in part for warning improvements.
* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Drop
flags that are now guaranteed by gnulib.
* bootstrap: Resync to gnulib.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-09-24 06:53:07 -06:00
Eric Blake
f92c7e31fc build: fix regression in requiring yajl for new enough qemu
Jonathan Lebon reported an issue to me off-list about his build
failing to use qemu because he failed to install yajl-devel.  But
I recalled specifically tweaking configure.ac to die in that
situation (commits 350583c, ba9c38b).  After a bit more
head-scratching, we found the cause of the regression: commit
654c709 rearranged things so that the qemu version check now
occurs before AC_ARG_WITH has had a chance to set either
$with_qemu or $with_yajl.

Coincidentally, this fix aligns with a documentation patch that
was just posted to the autoconf mailing list :)
http://thread.gmane.org/gmane.comp.sysutils.autoconf.patches/8324

* m4/virt-lib.m4 (LIBVIRT_CHECK_LIB, LIBVIRT_CHECK_LIB_ALT)
(LIBVIRT_CHECK_PKG): Populate defaults earlier.
* configure.ac (AC_ARG_WITH): Likewise for drivers.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-09-10 12:03:19 -06:00
Eric Blake
ff77742104 build: avoid obsolete AC_HELP_STRING
Autoconf states that AC_HELP_STRING is obsolete, and that new
programs should use AS_HELP_STRING.  We also had instances of
not properly quoting the macro usage, and not relying on autoconf's
word-wrapping abilities to avoid long lines.  I validated that this
commit has no impact to the generated configure file.

* configure.ac (AC_ARG_WITH, AC_ARG_ENABLE): Autoconf recommends
the use of AS_HELP_STRING.  Also, use proper quoting and wrap long
lines.
* m4/virt-apparmor.m4 (LIBVIRT_CHECK_APPARMOR): Likewise.
* m4/virt-selinux.m4 (LIBVIRT_CHECK_SELINUX): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-09-09 13:27:49 -06:00
Guido Günther
3e2799add2 Check for --no-copy-dt-needed linker flag
and use it when available
2013-08-22 16:17:36 +02:00
Guido Günther
d9527b6d56 Simplify RELRO_LDFLAGS
by adding it to AM_LDFLAGS instead of every linking rule and
by avoiding a forked grep.
2013-08-22 16:17:35 +02:00
Eric Blake
10ec64105b maint: slightly reduce configure size
Rather than inlining gl_WARN_ADD loads of time, we can shave about
17k size off of the configure script by delaying it to a cleanup
shell loop.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Track a
list of things to check, rather than inlining multiple checks.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-08-16 13:31:05 -06:00
Giuseppe Scrivano
a197fe5f9f configure: fix formatting of missing pkg-config modules error
It adds an empty space after the package version.  Previously the error
message looked like:

"You must install the dbus-1 >= 1.0.0pkg-config module to compile libvirt"

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
2013-08-08 13:31:10 -06:00
Eric Blake
ff38690be9 maint: the compiler is not always named gcc
https://bugzilla.redhat.com/show_bug.cgi?id=994589 complained that
even when using a cross-compiler not named 'gcc', the configure
output confusingly referred to gcc.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Use a
more generic statement in configure output.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-08-07 09:44:52 -06:00
Ján Tomko
4b91dc24d1 Fix build with clang
Partially revert cdd703f's revert of c163410, as linking with clang
with --param=ssp-buffer-size=4 still fails with:
"argument unused during compilation".
2013-07-04 11:35:59 +02:00
Eric Blake
cdd703f475 maint: update to latest gnulib
The latest mingw headers on Fedora 19 fail to build with gnulib
without an update.

Meanwhile, now that upstream gnulib has better handling of -W
probing for clang, we can drop some of our own solutions in
favor of upstream; thus this reverts commit c1634100, "Correctly
detect warning flags with clang".

* .gnulib: Update to latest, for mingw and clang.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-07-03 11:02:33 -06:00
Roman Bogorodskiy
cc7cd6232e FreeBSD: disable buggy -fstack-protector-all
FreeBSD ships an old gcc 4.2.1 which generates
bogus code, e.g. getsockopt() call returns
struct xucred with bogus values, which doesn't even
allow to connect to libvirtd:

error: Failed to find group record for gid '1284660778': No error: 0

So roll back to just -fstack-protector on FreeBSD.
2013-05-15 15:20:52 -06:00
Daniel P. Berrange
71b54636f0 Don't duplicate compiler warning flags when linking
Automake already passes all CFLAGS to the linker too, so it
is not necessary to set WARN_LDFLAGS in addition to the
WARN_CFLAGS variable.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:02:37 +01:00
Daniel P. Berrange
c163410044 Correctly detect warning flags with clang
Clang will happily claim to support any warning flags
unless the -Werror and -Wunknown-warning-option flags
are set. Thus we need to make sure these are set when
testing for clags.

We must also set the clang specific warning flags
-Wno-unused-command-line-argument to avoid a warning
from the ssp-buffer-size flag when linking .o files.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:00:22 +01:00
Daniel P. Berrange
c43b685a1d Ensure consistent enablement of gcc 'diagnostic' pragma
The virt-compile-warnings.m4 file would do an explicit
check for whether the compile could use the 'diagnostic'
pragma push/pop feature. The src/internal.h file would
then only enable it for GCC >= 4.6

This breaks with clang which supports the pragma but
does not claim GCC 4.6 compat. Export a variable from
the m4 check to the header file so they are consistent.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:00:22 +01:00
Daniel P. Berrange
c03eff7717 Don't enable -fPIE on Win32 platforms
On win32, all code is position independent and adding -fPIE
to the compiler flags results in warnings being printed

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-04-15 17:35:30 +01:00
Daniel P. Berrange
e57aaa6fcf Disable cast-align warnings in various places
There are a number of places which generate cast alignment
warnings, which are difficult or impossible to address. Use
pragmas to disable the warnings in these few places

conf/nwfilter_conf.c: In function 'virNWFilterRuleDetailsParse':
conf/nwfilter_conf.c:1806:16: warning: cast increases required alignment of target type [-Wcast-align]
         item = (nwItemDesc *)((char *)nwf + att[idx].dataIdx);
conf/nwfilter_conf.c: In function 'virNWFilterRuleDefDetailsFormat':
conf/nwfilter_conf.c:3238:16: warning: cast increases required alignment of target type [-Wcast-align]
         item = (nwItemDesc *)((char *)def + att[i].dataIdx);

storage/storage_backend_mpath.c: In function 'virStorageBackendCreateVols':
storage/storage_backend_mpath.c:247:17: warning: cast increases required alignment of target type [-Wcast-align]
         names = (struct dm_names *)(((char *)names) + next);

nwfilter/nwfilter_dhcpsnoop.c: In function 'virNWFilterSnoopDHCPDecode':
nwfilter/nwfilter_dhcpsnoop.c:994:15: warning: cast increases required alignment of target type [-Wcast-align]
         pip = (struct iphdr *) pep->eh_data;
nwfilter/nwfilter_dhcpsnoop.c:1004:11: warning: cast increases required alignment of target type [-Wcast-align]
     pup = (struct udphdr *) ((char *) pip + (pip->ihl << 2));

nwfilter/nwfilter_learnipaddr.c: In function 'procDHCPOpts':
nwfilter/nwfilter_learnipaddr.c:327:33: warning: cast increases required alignment of target type [-Wcast-align]
                 uint32_t *tmp = (uint32_t *)&dhcpopt->value;
nwfilter/nwfilter_learnipaddr.c: In function 'learnIPAddressThread':
nwfilter/nwfilter_learnipaddr.c:501:43: warning: cast increases required alignment of target type [-Wcast-align]
                     struct iphdr *iphdr = (struct iphdr*)(packet +
nwfilter/nwfilter_learnipaddr.c:538:43: warning: cast increases required alignment of target type [-Wcast-align]
                     struct iphdr *iphdr = (struct iphdr*)(packet +
nwfilter/nwfilter_learnipaddr.c:544:48: warning: cast increases required alignment of target type [-Wcast-align]
                         struct udphdr *udphdr= (struct udphdr *)

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-04-08 10:03:21 +01:00
Daniel P. Berrange
fc8c1787d8 Enable full RELRO mode
By passing the flags -z relro -z now to the linker, we can force
it to resolve all library symbols at startup, instead of on-demand.
This allows it to then make the global offset table (GOT) read-only,
which makes some security attacks harder.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-04-03 16:19:35 +01:00
Daniel P. Berrange
1150999ca4 Build all binaries with PIE
PIE (position independent executable) adds security to executables
by composing them entirely of position-independent code (PIC. The
.so libraries already build with -fPIC. This adds -fPIE which is
the equivalent to -fPIC, but for executables. This for allows Exec
Shield to use address space layout randomization to prevent attackers
from knowing where existing executable code is during a security
attack using exploits that rely on knowing the offset of the
executable code in the binary, such as return-to-libc attacks.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-04-03 16:19:35 +01:00
Daniel P. Berrange
9fe43021f3 Fix typo in configure.ac causing $LIBS to gain a copy of $CFLAGS
The virt-dbus.m4 check for DBus was preserving $LIBS before
modifying it. Except it wasn't. It was preserving another
copy of $CFLAGS. The result was that after the check completed,
$LIBS got polluted with $CFLAGS

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-02-05 18:04:16 +00:00
Daniel P. Berrange
688b3ecfe9 Fix typo LIBCURL_{CFLAGS,LIBS} to CURL_{CFLAGS,LIBS}
Some places missed the conversion from LIBCURL_{CFLAGS,LIBS} to
CURL_{CFLAGS,LIBS}, and a part of curl check was left in
configure.ac instead of m4/virt-curl.m4 by mistake
2013-01-14 17:22:31 +00:00
Eric Blake
cc453bb548 maint: typo fix
I noticed this typo while configuring on a freshly-installed machine.

* m4/virt-udev.m4: Correct pciaccess name.
2013-01-14 09:33:48 -07:00
Daniel P. Berrange
907a39e735 Add a test suite for validating SELinux labelling
There are many aspects of the guest XML which result in the
SELinux driver applying file labelling. With the increasing
configuration options it is desirable to test this behaviour.
It is not possible to assume that the test suite has the
ability to set SELinux labels. Most filesystems though will
support extended attributes. Thus for the purpose of testing,
it is possible to extend the existing LD_PRELOAD hack to
override setfilecon() and getfilecon() to simply use the
'user.libvirt.selinux' attribute for the sake of testing.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:40:04 +00:00
Daniel P. Berrange
a99bfb4b5e Convert openwsman check to use LIBVIRT_CHECK_PKG 2013-01-14 13:29:54 +00:00
Daniel P. Berrange
0eec69729d Convert ssh2 check to use LIBVIRT_CHECK_PKG
This converts the libssh2 configure check to use LIBVIRT_CHECK_PKG.
Previously it would check version 1.0 and 1.3, but this simplifies
things to just require version 1.3
2013-01-14 13:29:44 +00:00
Daniel P. Berrange
40541c2a6b Convert curl check over to use LIBVIRT_CHECK_PKG 2013-01-14 13:29:34 +00:00
Daniel P. Berrange
e9f4c675e2 Convert fuse check over to use LIBVIRT_CHECK_PKG 2013-01-14 13:29:17 +00:00
Daniel P. Berrange
19e285f1ae Convert blkid check over to use LIBVIRT_CHECK_PKG
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:26:47 +00:00
Daniel P. Berrange
f488ddf4d8 Convert HAL check to use LIBVIRT_CHECK_PKG
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:26:47 +00:00
Daniel P. Berrange
04ac20df3f Convert udev/pciaccess checks to use LIBVIRT_CHECK_PKG
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:26:47 +00:00
Daniel P. Berrange
bae47e4e30 Convert avahi check to use LIBVIRT_CHECK_PKG
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:26:46 +00:00
Daniel P. Berrange
832d140930 Convert DBus check to use LIBVIRT_CHECK_PKG
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:25:47 +00:00
Daniel P. Berrange
e763ad256d Convert netcf check to use LIBVIRT_CHECK_PKG
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:25:40 +00:00
Daniel P. Berrange
cf6f8811fb Convert cap-ng check to use LIBVIRT_CHECK_LIB
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:25:06 +00:00
Daniel P. Berrange
c85e1dd71b Convert numactl checks to use LIBVIRT_CHECK_LIB
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:25:06 +00:00
Daniel P. Berrange
766ace80d6 Convert apparmor check to use LIBVIRT_CHECK_LIB
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:25:05 +00:00
Daniel P. Berrange
98de5f3e5d Convert selinux check to use LIBVIRT_CHECK_LIB
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:24:49 +00:00
Eric Blake
10370efb29 build: avoid m4_expand for RHEL 5
Problem introduced in commit cd699ed.

* m4/virt-lib.m4 (LIBVIRT_CHECK_LIB, LIBVIRT_CHECK_PKG): Set up
direct expansions, since autoconf 2.59 lacked m4_expand.
2013-01-11 11:30:55 -07:00
Daniel P. Berrange
054bbfcbaa Convert audit check to use LIBVIRT_CHECK_LIB
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-11 11:03:23 +00:00
Daniel P. Berrange
c45fed8a63 Convert sasl check to use LIBVIRT_CHECK_LIB_ALT
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-11 11:03:23 +00:00
Daniel P. Berrange
a38dbf6673 Convert sanlock check to use LIBVIRT_CHECK_LIB
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-11 11:03:23 +00:00
Daniel P. Berrange
654c709baa Convert yajl check to use LIBVIRT_CHECK_LIB_ALT
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-11 11:03:23 +00:00
Daniel P. Berrange
cd699ed150 Add some autoconf helper macros for checking for libraries
Most checks for libraries take the same format

  * --with-libFOO=yes|no|check|/some/path  argument
  * check for a function NNN in libFOO.so
  * check for a header file DDD/HHH.h
  * Define a WITH_FOO config.h symbol
  * Define a WITH_FOO make conditional
  * Substitute FOO_CFLAGS and FOO_LIBS make variables
  * Print CFLAGS & LIBS summary at the end

Doing all this correctly is rather difficult, typically
done by copy+paste of a previous usage. Further small
improvements people make are not applied to all previous
usages.

Improve this by creating some helper macros to apply
good practice. First, to perform the actual checks:

  LIBVIRT_CHECK_LIB([SELINUX], [selinux],
     [getfilecon], [selinux/selinux.h])

This checks for 'getfilecon' in -lselinux, and the
existence of 'selinux/selinux.h' header file. If successful
it sets SELINUX_CFLAGS and SELINUX_LIBS. The WITH_SELINUX
config.h macro and WITH_SELINUX make conditional are also
defined.

In some cases we need to check two variants of the same
library

  LIBVIRT_CHECK_LIB_ALT([SASL], [sasl2],
                        [sasl_client_init], [sasl/sasl.h],
                        [SASL1], [sasl],
                        [sasl_client_init], [sasl/sasl.h])

This checks for sasl_client_init in libsasl2, and if that
is not found, checks sasl_client_init in libsasl. If the
first check succeeds WITH_SASL is set, while if the second
check succeeds *both* WITH_SASL and WITH_SASL1 are set.

If the library supports pkg-config, then another variant
is available

  LIBVIRT_CHECK_PKG([AVAHI], [avahi-client], [0.6.0])

This checks for avahi-client >= 0.6.0 via pkg-config
and sets WITH_AVAHI if found.

Finally to print a summary of CFLAGS & LIBs found (if any):

  LIBVIRT_RESULT_LIB([SELINUX])

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-11 11:03:22 +00:00
Eric Blake
6e148567fd build: make broken -Wlogical-op test be gcc-only
Commit 8b8fcdea introduced a check for broken gcc -Wlogical-op,
but did not guard the check against non-gcc compilers, which might
lead to spurious failures when another compiler encounters an
unknown pragma.  Additionally, all of our compiler warning logic
should belong in a single file, and use cache variables to allow
overriding the decision at configure time if necessary.

* configure.ac (BROKEN_GCC_WLOGICALOP): Move...
* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): ...here,
and update to modern autoconf idioms.
2012-12-19 12:21:09 -07:00
Eric Blake
cf9bced084 build: improve FORTIFY_SOURCE usage
Based on this coreutils bug report, since coreutils copied what
libvirt had done:
https://lists.gnu.org/archive/html/bug-coreutils/2012-10/msg00121.html

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Allow
for user to pre-define _FORTIFY_SOURCE.
2012-10-23 14:00:32 -06:00
Eric Blake
814a8deaa1 build: avoid -Wno-format on new-enough gcc
Commit c579d6b added a sledgehammer to silence spurious warnings from
gcc 4.2, but in the process, it also silenced useful warnings from
gcc 4.3 through 4.5.  As a result, a bug slipped in to commit 0caccb58.

Tested with FreeBSD (gcc 4.2.1), RHEL 6.3 (gcc 4.4), and F17 (gcc 4.7.2),
where the former didn't trip on spurious warnings, and where the latter
two detected a revert of 2b804cf.

* m4/virt-compile-warnings.m4 (-Wno-format): Probe for the actual
spurious message, to once again allow gcc 4.4 to use -Wformat.
2012-10-02 09:48:23 -06:00
Eric Blake
892242519a build: fix build on older gcc
On RHEL 6.2, gcc 4.4.6 complains:
cc1: warning: command line option "-Wenum-compare" is valid for C++/ObjC++ but not for C
which in turn breaks a -Werror build.

Meanwhile, in Fedora 17, gcc 4.7.0, -Wenum-compare has been enhanced
to also work on C, but at the same time, it is documented that -Wall
now implicitly includes -Wenum-compare.

Therefore, it is sufficient to remove explicit checks for this option,
avoiding the warning from older gcc while still getting the
compile-time safety from newer gcc.

* m4/virt-compile-warnings.m4 (-Wenum-compare): Omit explicit check.
2012-09-07 14:15:22 -06:00
Eric Blake
c579d6b3d6 build: avoid warnings from gcc 4.2.1
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.
2012-09-05 12:05:55 -06:00
Eric Blake
42af2167a4 build: avoid warnings on older gcc
A previous patch (c606671a) pulled in a newer version of
stat-time.h from gnulib, which causes some warnings in older gcc:

  CC     libvirt_driver_storage_la-storage_backend.lo
cc1: warnings being treated as errors
In file included from ../../src/storage/storage_backend.c:59:
../../gnulib/lib/stat-time.h:55: error: no previous prototype for 'get_stat_atime_ns' [-Wmissing-prototypes]

Upstream gnulib argues that these warnings are stupid (and I agree;
see <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>), and has
used a modern gcc feature (#pragma GCC diagnostic push) to avoid the
warning.  But we still aim to compile on RHEL 6.3, with gcc 4.4.6
(not to mention even older platforms like RHEL 5), and therefore
the warning trips up our default of development with -Werror.

It took me a while to figure out how to make our set of warnings
smaller on older gcc without losing the benefit of the warnings
when using newer gcc (such as the one on Fedora 17), but this
should do the trick.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Avoid
warnings that gnulib can't silence on older gcc.
2012-08-15 13:30:21 -06:00
Hendrik Schwartke
7383c1d762 Added timestamps to storage volumes
The access, birth, modification and change times are added to
storage volumes and corresponding xml representations.  This
shows up in the XML in this format:

<timestamps>
  <atime>1341933637.027319099</atime>
  <mtime>1341933637.027319099</mtime>
</timestamps>

Signed-off-by: Eric Blake <eblake@redhat.com>
2012-08-02 17:14:17 -06:00
Eric Blake
1c2edf0fbd maint: make it easier to copy FORTIFY_SOURCE snippet
While libvirt intentionally avoids -Wundef (after all, C99
guarantees sane semantics of treating undefined macros as 0),
the glibc insanity of #warning on _FORTIFY_SOURCE coupled with
what some people feel is the black magic of autoconf means
that other projects are likely to copy our snippet verbatim.
We can be nicer to other projects by making it easier to
integrate into projects that use -Wundef.

Suggested by Christophe Fergeau.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Be nice
to other projects using -Wundef.
2012-06-07 10:52:37 -06:00
Eric Blake
2af63b1c34 build: allow building with newer glibc-headers and -O0
glibc 2.15 (on Fedora 17) coupled with explicit disabling of
optimization during development dies a painful death:

In file included from /usr/include/limits.h:27:0,
                 from /usr/lib/gcc/x86_64-redhat-linux/4.7.0/include/limits.h:169,
                 from /usr/lib/gcc/x86_64-redhat-linux/4.7.0/include/syslimits.h:7,
                 from /usr/lib/gcc/x86_64-redhat-linux/4.7.0/include/limits.h:34,
                 from util/bitmap.c:26:
/usr/include/features.h:314:4: error: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Werror=cpp]
cc1: all warnings being treated as errors

Work around this by only conditionally defining _FORTIFY_SOURCE,
in the case where glibc can actually use it.  The trick is using
AH_VERBATIM instead of AC_DEFINE.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Squelch
_FORTIFY_SOURCE when needed to avoid glibc #warnings.
2012-06-04 12:08:27 -06:00
Daniel P. Berrange
851117bd7a Enable all warnings permanently & default to -Werror for GIT builds
Given that we auto-detect whether each -Wxxxx flag is supported by
GCC, and we are warning-free and use automake silent rules, there
is no compelling reason to allow compile warnings to be disabled.

Replace the --enable-compile-warnings flag with a simpler
--enable-werror flag, which defaults to 'yes' if building
from GIT, or 'no' if building from tar.gz

This helps ensure that everyone writing patches for libvirt will
take care to fix their warning problems before submitting for
review

* autobuild.sh: Force -Werror
* configure.ac: Update for LIBVIRT_COMPILE_WARNINGS macro change
* m4/virt-compile-warnings.m4: Permanently enable all warnings,
  auto-enable Werror for GIT builds
2012-03-27 17:08:06 +01:00
Eric Blake
d940e3bdb9 build: silence some compiler warnings from gnulib
Gnulib claims that there are some classes of warnings that are
worth enabling during development, but where silencing those
warnings causes code bloat that is not necessary in an optimized
build.  The code bloat to silence the warnings is only enabled
by -Dlint.  Follow the lead of coreutils in setting up -Dlint
whenever full warnings are requested.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Add
-Dlint, and move _FORTIFY_SOURCE to config.h instead of CFLAGS.
2012-01-19 13:14:10 -07:00
Eric Blake
f17e0e2182 build: reduce warnings from older gcc
Older gcc warns (on every file!) that -Wabi and -Wdeprecated only
make sense on C++ projects.  Newer gcc accepts these warnings for
C, but it is not clear that they can do anything useful, so it
is easier to just drop the warnings altogether.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Silence
-Wabi and -Wdeprecated on older gcc.
Reported by Peter Krempa.
2011-12-05 10:14:55 -07:00
Eric Blake
75da320087 build: fix build at -O2 on rawhide
I had previously tested commit 059d746 with -O intentionally omitted
from my CFLAGS; but that means that I missed out on this warning
from gcc 4.6.2 when optimizations are enabled:

util/buf.c: In function 'virBufferGetIndent':
util/buf.c:86:1: error: function might be candidate for attribute 'pure' [-Werror=suggest-attribute=pure]

While it is probably a good idea to add the attributes and silence
this warning, it's also invasive; 'make -k' found more than 75 such
complaints.  And it doesn't help that gcc 4.6.2 is still buggy
(coreutils reported a case where gcc 4.6.2 incorrectly suggested
marking a function pure that incremented a global variable; fixed
in gcc 4.7).  So the best fix for now is to disable the warning.

It also doesn't help that I stumbled across another problem - gcc
documents that -Wsuggest-attribute=pure only warns if you use -O,
or if you use -fipa-pure-const.  But in practice, when I omitted -O
but added -fipa-pure-const, the warnings are fickle - I got warnings
for simple compilation that disappeared when I also added -fPIC.
And the way libtool compiles things is with -fPIC first, then without
-fPIC but with errors sent to /dev/null - which meant that without
disabling -Wsuggest-attribute=pure, I got a compile error with no
message.  :(  See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10197

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Silence
-Wsuggest-attribute warnings for now.
2011-12-02 13:00:57 -07:00
Eric Blake
059d746ddb build: update to latest gnulib
* .gnulib: Update to latest, for improved 'make syntax-check' and
compiler warnings.
* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS):
Re-silence -Wformat-nonliteral.
* cfg.mk (_test_script_regex): Recognize our test scripts.
* gnulib/local/lib/*.diff: Drop, now that gnulib has this.
* tests/virsh-optparse: Fix use of compare.
* tests/virsh-schedinfo: Likewise.
2011-12-01 14:12:59 -07:00
Matthias Bolte
9ba4eb3c08 tests: Lower stack usage below 4096 bytes
Make virtTestLoadFile allocate the buffer to read the file into.

Fix logic error in virtTestLoadFile, stop reading on the first empty line.

Use virFileReadLimFD in virtTestCaptureProgramOutput to avoid manual
buffer handling.
2011-04-30 19:59:52 +02:00
Eric Blake
02c39a2f6d build: fix gitignore sorting
Make it so we don't have to 'git add -f' particular files like
po/POTFILES.in all the time (tested by fixing one of our
special-case files as part of the patch).

* .gnulib: Update to latest.
* bootstrap: Resync from coreutils.
* .gitignore: Sort whitelist entries correctly, including ignoring
files rather than directories.
* m4/virt-compile-warnings.m4: Convert tabs to space.
2011-04-07 15:03:53 -06:00
Jim Fehlig
3df6fd706c Fix build for older gcc
With gcc 4.3.4 I'm seeing the following warning failure

cc1: warnings being treated as errors
cc1: error: -funit-at-a-time is required for inlining of functions
that are only called once [-Wdisabled-optimization]

Add -funit-at-a-time to WARN_CFLAGS.
2011-04-06 15:05:45 -06:00
Daniel P. Berrange
dba5ba62bb Don't try to enable stack protector on Win32
The GCC Win32 compiler will claim to support -fstack-protector,
but if it actually gets triggered by a suitable code pattern,
linking will fail. Other non-Linux OS likely suffer the same
way with gcc.

* m4/virt-compile-warnings.m4: Only use stack protector when
  the build target is Linux.
2011-04-05 17:43:40 +01:00
Daniel P. Berrange
a4e37ff1a3 Enable use of -Wold-style-definition compiler flag
A couple of functions were declared using the old style foo()
for no-parameters, instead of foo(void)

* src/xen/xen_hypervisor.c, tests/testutils.c: Replace () with (void)
  in some function declarations
* m4/virt-compile-warnings.m4: Enable -Wold-style-definition
2011-04-05 11:40:04 +01:00
Daniel P. Berrange
329e9dc629 Enable use of -Wmissing-noreturn
* src/internal.h: Define a ATTRIBUTE_NO_RETURN annotation
* src/lxc/lxc_container.c: Annotate lxcContainerDummyChild
  with ATTRIBUTE_NO_RETURN
* tests/eventtest.c: Mark async thread as ATTRIBUTE_NO_RETURN
* m4/virt-compile-warnings.m4: Enable -Wmissing-noreturn
2011-04-05 11:39:58 +01:00
Daniel P. Berrange
7d76d5d506 Enable -Wmissing-format-attribute warning
Add a couple of missing ATTRIBUTE_FMT_PRINTF annotations

* tools/virsh.c, tests/testutils.c: Add printf format attribute
* m4/virt-compile-warnings.m4: Enable -Wmissing-format-attribute
2011-04-05 11:39:52 +01:00
Daniel P. Berrange
4825b521e2 Remove acinclude.m4 file
Split the bit acinclude.m4 file into smaller pieces named
as m4/virt-XXXXX.m4

* .gitignore: Ignore gettext related files
* acinclude.m4: Delete
* m4/virt-compile-warnings.m4: Checks for GCC compiler flags
* m4/virt-pkgconfig-back-compat.m4: Backcompat check for
  pkgconfig program
2011-04-05 11:39:44 +01:00
Daniel P. Berrange
0e867555bd Use gnulib's manywarnings & warnings modules
Remove custom code for checking compiler warnings, using
gl_WARN_ADD instead. Don't list all flags ourselves, use
gnulib's gl_MANYWARN_ALL_GCC to get all possible GCC flags,
then turn off the ones we don't want yet.

* acinclude.m4: Rewrite to use gl_WARN_ADD and gl_MANYWARN_ALL_GCC
* bootstrap.conf: Add warnings & manywarnings
* configure.ac: Switch to gl_WARN_ADD
* m4/compiler-flags.m4: Obsoleted by gl_WARN_ADD
2011-04-05 11:39:35 +01:00
Eric Blake
144c06d4ee maint: update to latest gnulib
Allows bootstrap to work on FreeBSD, where gzip doesn't have a '.'
in its version; and silences false positives in the new
'make syntax-check' rule.

* .gnulib: Update to latest.
* bootstrap: Synchronize to upstream.
* .x-sc_bindtextdomain: New exemptions.
* Makefile.am (syntax_check_exceptions): Ship new file.
* .gitignore: Regenerate per latest bootstrap, anchor entries that
are only in the root directory, and consolidate entries from other
generated .gitignore files.
* build-aux/.gitignore, m4/.gitignore, po/.gitignore: Remove from
version control, since bootstrap generates them.
2010-11-17 10:13:12 -07:00
Eric Blake
e7064aa6a2 build: restore operation of bit-rotted 'make cov'
'./autobuild.sh' with lcov installed discovered that our
coverage support has been bit-rotting for a while.  This
restores it back to a successful state, although I have
not yet spent any time looking through the resulting files to
look for low-hanging fruit in the unit test coverage front.

* configure.ac: Clear COMPILER_FLAGS at right place.
* Makefile.am (cov): Newer genhtml no longer likes plain -s.
* m4/compiler-flags.m4 (gl_COMPILER_FLAGS): Don't AC_SUBST
COMPILER_FLAGS; it is a shell variable for use in configure only.
* src/Makefile.am (AM_CFLAGS, AM_LDFLAGS): New variables, to make
it easier to provide global flag additions.  Use throughout, to
uniformly apply coverage flags.
* .gitignore: Globally ignore gcov output.
* daemon/.gitignore: Simplify.
* src/.gitignore: Likewise.
* tests/.gitignore: Likewise.
2010-07-29 13:41:25 -06:00
Eric Blake
e07cf19fe5 build: don't use "test cond1 -o cond2": it's not portable
* configure.ac: Use "test cond1 || test cond2" instead.
* m4/compiler-flags.m4 (gl_COMPILER_FLAGS): Likewise.
* tests/test-lib.sh (verbose): Likewise.
2010-03-25 09:28:24 +01:00
Jim Meyering
fb98f4b10d remove all .cvsignore files 2009-07-08 16:17:51 +02:00
Daniel P. Berrange
aaabde58cb Remove trailing whitespace from m4 file 2009-04-30 13:30:51 +00:00
Daniel P. Berrange
cb4a6614fa Fix check for -Wformat-security which depends on -Wformat 2009-04-28 10:55:45 +00:00
Jim Meyering
5f0c720163 .cvsignore: Add explicit list of generated files.
* .hgignore: Regenerate.
* m4/.gitignore: Regenerate.
2009-01-23 16:15:49 +00:00
Jim Meyering
48dc345f2d correct and tighten up .*ignore files
* .cvsignore: Don't ignore *.orig or *.rej.  They're not build products.
Don't ignore the entire m4 directory.
* Makefile.maint (sync-vcs-ignore-files): Correct quoting.
Use sed rather than a for loop.
Search only version-controled files (for reproducibility)
* gnulib/lib/netinet/.cvsignore: Append missing newline-at-EOF,
so that the use of sed doesn't mistakenly concatenate lines.
* gnulib/lib/sys/.cvsignore: Likewise.
* m4/.cvsignore: Ignore acinclude.m4 and aclocal.m4, not *.m4.
* .hgignore: Regenerate.
* all .gitignore files: Regenerate.
2009-01-23 13:32:17 +00:00
John Levon
a7acdde406 generate .hgignore 2009-01-22 19:03:11 +00:00
John Levon
d052118dae Improve compiler flag checking 2009-01-14 15:23:26 +00:00
Jim Meyering
261e7581b1 Use gnulib, starting with its physmem and getaddrinfo modules.
New files go into these directories:
  gnulib/lib
  gnulib/m4
  gnulib/tests

* bootstrap: A wrapper around gnulib-tool.
* configure.in: Invoke gl_EARLY and gl_INIT, being careful to put gl_EARLY
before any macro that uses AC_COMPILE_IFELSE.
(AC_OUTPUT): Add lib/Makefile and gl-tests/Makefile.  Remove m4/Makefile.
* Makefile.am (SUBDIRS): Add gnulib/lib and remove m4.  Add gnulib/tests
early enough that those tests run before any libvirt unit tests.
* m4/Makefile.am: Remove file.  Not needed.
* src/Makefile.am (INCLUDES): Add -I$(top_srcdir)/gnulib/lib -I../gnulib/lib.
(LDADDS, libvirt_la_LIBADD): Add ../gnulib/lib/libgnu.la.
* src/nodeinfo.c: Include "physmem.h".
* qemud/qemud.c, src/remote_internal.c: Include "getaddrinfo.h".
(MEMINFO_PATH, linuxNodeInfoMemPopulate): Remove definitions.
(virNodeInfoPopulate): Use physmem_total, not linuxNodeInfoMemPopulate.
* tests/Makefile.am (INCLUDES): Add -I$(top_srcdir)/gnulib/lib -I../gnulib/lib.
(LDADDS): Add ../gnulib/lib/libgnu.la.
* qemud/Makefile.am (libvirtd_LDADD): Add ../gnulib/lib/libgnu.la.
* tests/nodeinfotest.c (linuxTestCompareFiles): No longer read total
memory from a file.
Update expected output not to include "Memory: NNNN"
* tests/nodeinfodata/linux-nodeinfo-1.txt:
* tests/nodeinfodata/linux-nodeinfo-2.txt:
* tests/nodeinfodata/linux-nodeinfo-3.txt:
* tests/nodeinfodata/linux-nodeinfo-4.txt:
* tests/nodeinfodata/linux-nodeinfo-5.txt:
* tests/nodeinfodata/linux-nodeinfo-6.txt:
* src/test.c [WITH_TEST]: Remove definition of _GNU_SOURCE that
would conflict with the one now in "config.h".
* autogen.sh: Add -I gnulib/m4.
* src/conf.c, src/sexpr.c: Don't define _GNU_SOURCE.
Instead, include "config.h".
* qemud/qemud.c: Remove definition of _GNU_SOURCE.
* src/openvz_driver.c: Likewise.
* src/qemu_driver.c: Likewise.
* src/remote_internal.c: Likewise.

* configure.in: Use AC_CONFIG_AUX_DIR(build-aux), so that a bunch
of gettextize-generated files go into build-aux/, rather than in
the top-level directory.
* .cvsignore: Adjust.
* build-aux/.cvsignore: New file.


Author: Jim Meyering <meyering@redhat.com>
2007-12-05 21:31:07 +00:00
Daniel P. Berrange
d09a9a4294 Added m4 scripts to check compiler flags 2007-02-14 02:29:20 +00:00