Bug: Compile Fail - v4.4

Bug: Compile Fail - v4.4

[merc1984]

On Debian Testing, x86_64.

I cannot get Xen compiled.  I've carefully followed the wiki here: 
http://wiki.xen.org/wiki/Compiling_Xen_From_Source
... especially WRT dependencies, but no change.

gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wdeclaration-after-statement
-Wno-unused-but-set-variable -Wno-unused-local-typedefs   -or -g
-Wno-unused -fno-strict-aliasing -I../include -I../drivers
-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/libxc
-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../.
gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wdeclaration-after-statement
-Wno-unused-but-set-variable -Wno-unused-local-typedefs   -or -g
-Wno-unused -fno-strict-aliasing -I../include -I../drivers
-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/libxc
-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../.
gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wdeclaration-after-statement
-Wno-unused-but-set-variable -Wno-unused-local-typedefs   -ror -g
-Wno-unused -fno-strict-aliasing -I../include -I../drivers
-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/libxc
-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../
block-qcow.c: In function ‘get_cluster_offset’:
block-qcow.c:431:3: error: ‘tmp_ptr’ may be used uninitialized in this
function [-Werror=maybe-uninitialized]
   memcpy(tmp_ptr, l1_ptr, 4096);
   ^
block-qcow.c:606:7: error: ‘tmp_ptr2’ may be used uninitialized in this
function [-Werror=maybe-uninitialized]
   if (write(s->fd, tmp_ptr2, 4096) != 4096) {
       ^
cc1: all warnings being treated as errors
/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/Rules.mk:89:
recipe for target 'block-qcow.o' failed
make[6]: *** [block-qcow.o] Error 1
make[6]: Leaving directory
'/usr/local/src/xen-4.4.0/tools/blktap2/drivers'
/usr/local/src/xen-4.4.0/tools/blktap2/../../tools/Rules.mk:105: recipe
for target 'subdir-install-drivers' failed
make[5]: *** [subdir-install-drivers] Error 2
make[5]: Leaving directory '/usr/local/src/xen-4.4.0/tools/blktap2'
/usr/local/src/xen-4.4.0/tools/blktap2/../../tools/Rules.mk:100: recipe
for target 'subdirs-install' failed
make[4]: *** [subdirs-install] Error 2
make[4]: Leaving directory '/usr/local/src/xen-4.4.0/tools/blktap2'
/usr/local/src/xen-4.4.0/tools/../tools/Rules.mk:105: recipe for target
'subdir-install-blktap2' failed
make[3]: *** [subdir-install-blktap2] Error 2
make[3]: Leaving directory '/usr/local/src/xen-4.4.0/tools'
/usr/local/src/xen-4.4.0/tools/../tools/Rules.mk:100: recipe for target
'subdirs-install' failed
make[2]: *** [subdirs-install] Error 2
make[2]: Leaving directory '/usr/local/src/xen-4.4.0/tools'
Makefile:96: recipe for target 'install-tools' failed
make[1]: *** [install-tools] Error 2
make[1]: Leaving directory '/usr/local/src/xen-4.4.0'
Makefile:144: recipe for target 'world' failed
make: *** [world] Error 2

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Re: Bug: Compile Fail - v4.4

[merc1984]

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Can someone please advise?  I need this to get VGA passthrough, as
Debian Xen packages can't do it.



On Mon, Jun 16, 2014, at 11:37, [1]merc1984@f-m.fm wrote:



On Debian Testing, x86_64.



I cannot get Xen compiled.  I've carefully followed the wiki here:

[2]http://wiki.xen.org/wiki/Compiling_Xen_From_Source

... especially WRT dependencies, but no change.



gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing
-std=gnu99

-Wall -Wstrict-prototypes -Wdeclaration-after-statement

-Wno-unused-but-set-variable -Wno-unused-local-typedefs   -or -g

-Wno-unused -fno-strict-aliasing -I../include -I../drivers

-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/libxc

-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../.

gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing
-std=gnu99

-Wall -Wstrict-prototypes -Wdeclaration-after-statement

-Wno-unused-but-set-variable -Wno-unused-local-typedefs   -or -g

-Wno-unused -fno-strict-aliasing -I../include -I../drivers

-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/libxc

-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../.

gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing
-std=gnu99

-Wall -Wstrict-prototypes -Wdeclaration-after-statement

-Wno-unused-but-set-variable -Wno-unused-local-typedefs   -ror -g

-Wno-unused -fno-strict-aliasing -I../include -I../drivers

-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/libxc

-I/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../

block-qcow.c: In function ‘get_cluster_offset’:

block-qcow.c:431:3: error: ‘tmp_ptr’ may be used uninitialized in this

function [-Werror=maybe-uninitialized]

  memcpy(tmp_ptr, l1_ptr, 4096);

  ^

block-qcow.c:606:7: error: ‘tmp_ptr2’ may be used uninitialized in this

function [-Werror=maybe-uninitialized]

  if (write(s->fd, tmp_ptr2, 4096) != 4096) {

      ^

cc1: all warnings being treated as errors

/usr/local/src/xen-4.4.0/tools/blktap2/drivers/../../../tools/Rules.mk:
89:

recipe for target 'block-qcow.o' failed

make[6]: *** [block-qcow.o] Error 1

make[6]: Leaving directory

'/usr/local/src/xen-4.4.0/tools/blktap2/drivers'

/usr/local/src/xen-4.4.0/tools/blktap2/../../tools/Rules.mk:105: recipe

for target 'subdir-install-drivers' failed

make[5]: *** [subdir-install-drivers] Error 2

make[5]: Leaving directory '/usr/local/src/xen-4.4.0/tools/blktap2'

/usr/local/src/xen-4.4.0/tools/blktap2/../../tools/Rules.mk:100: recipe

for target 'subdirs-install' failed

make[4]: *** [subdirs-install] Error 2

make[4]: Leaving directory '/usr/local/src/xen-4.4.0/tools/blktap2'

/usr/local/src/xen-4.4.0/tools/../tools/Rules.mk:105: recipe for target

'subdir-install-blktap2' failed

make[3]: *** [subdir-install-blktap2] Error 2

make[3]: Leaving directory '/usr/local/src/xen-4.4.0/tools'

/usr/local/src/xen-4.4.0/tools/../tools/Rules.mk:100: recipe for target

'subdirs-install' failed

make[2]: *** [subdirs-install] Error 2

make[2]: Leaving directory '/usr/local/src/xen-4.4.0/tools'

Makefile:96: recipe for target 'install-tools' failed

make[1]: *** [install-tools] Error 2

make[1]: Leaving directory '/usr/local/src/xen-4.4.0'

Makefile:144: recipe for target 'world' failed

make: *** [world] Error 2



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References

1. mailto:merc1984@f-m.fm
2. http://wiki.xen.org/wiki/Compiling_Xen_From_Source
3. http://www.fastmail.fm/

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Re: Bug: Compile Fail - v4.4

[Jan Beulich]

>>> On 16.06.14 at 20:37, <merc1984@f-m.fm> wrote:

> On Debian Testing, x86_64.
> 
> I cannot get Xen compiled.  I've carefully followed the wiki here: 
> http://wiki.xen.org/wiki/Compiling_Xen_From_Source 
> ... especially WRT dependencies, but no change.

You don't mention the most important point here - you're using gcc
4.9.0. A patch for these new warnings was posted already (see
http://lists.xenproject.org/archives/html/xen-devel/2014-06/msg01399.html),
but in the original shape it wasn't immediately acceptable. An
alternative got posted in response a little later. You can pick
any (especially if you're not using blktap2), or simply disable
building of the blktap code via configure option.

As to your subsequent post - please be a little more patient.
Or, even better, just supply a patch (we're on xen-devel after
all).

Jan

Re: Bug: Compile Fail - v4.4

[merc1984]

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On Tue, Jun 17, 2014, at 0:51, Jan Beulich wrote:

On 16.06.14 at 20:37, <[1]merc1984@f-m.fm> wrote:



On Debian Testing, x86_64.



I cannot get Xen compiled.  I've carefully followed the wiki here:

[2]http://wiki.xen.org/wiki/Compiling_Xen_From_Source

... especially WRT dependencies, but no change.



You don't mention the most important point here - you're using gcc

4.9.0. A patch for these new warnings was posted already (see

[3]http://lists.xenproject.org/archives/html/xen-devel/2014-06/msg01399
.html),

but in the original shape it wasn't immediately acceptable. An

alternative got posted in response a little later. You can pick

any (especially if you're not using blktap2), or simply disable

building of the blktap code via configure option.


Thank you.  Be advised that I got this from the Supported download
point
(http://www.xenproject.org/downloads/xen-archives/xen-44-series/xen-440
.html), so this is going to keep happening, or users will simply give
up.

Also I wish I could make a number of clarifications and updates in the
wiki, of issues that tripped me up for days.

References

1. mailto:merc1984@f-m.fm
2. http://wiki.xen.org/wiki/Compiling_Xen_From_Source
3. http://lists.xenproject.org/archives/html/xen-devel/2014-06/msg01399.html

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Re: Bug: Compile Fail - v4.4

[Ian Campbell]

On Tue, 2014-06-17 at 07:43 -0700, merc1984@f-m.fm wrote:

 
> Also I wish I could make a number of clarifications and updates in the
> wiki, of issues that tripped me up for days.

If you register for an account then you can request write access via
http://xenproject.org/component/content/article/100-misc/145-request-to-be-made-a-wiki-editor.html

(sorry about this, spammers spoiling it for everyone...)

Ian.

Re: Bug: Compile Fail - v4.4

[Dario Faggioli]

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On mar, 2014-06-17 at 07:43 -0700, merc1984@f-m.fm wrote:
>   
> On Tue, Jun 17, 2014, at 0:51, Jan Beulich wrote:
> >                         On 16.06.14 at 20:37, <merc1984@f-m.fm>
> >                         wrote:
> >  
> >         On Debian Testing, x86_64.
> >          
> >         I cannot get Xen compiled.  I've carefully followed the wiki
> >         here:
> >         http://wiki.xen.org/wiki/Compiling_Xen_From_Source
> >         ... especially WRT dependencies, but no change.
> >  
> > You don't mention the most important point here - you're using gcc
> > 4.9.0. A patch for these new warnings was posted already (see
> > http://lists.xenproject.org/archives/html/xen-devel/2014-06/msg01399.html),
> > but in the original shape it wasn't immediately acceptable. An
> > alternative got posted in response a little later. You can pick
> > any (especially if you're not using blktap2), or simply disable
> > building of the blktap code via configure option.
>  
> Thank you.  Be advised that I got this from the Supported download
> point
> (http://www.xenproject.org/downloads/xen-archives/xen-44-series/xen-440.html), so this is going to keep happening, or users will simply give up.
>  
You're right. I tried to ping the discussion containing the proposed fix
already here:

 http://lists.xen.org/archives/html/xen-devel/2014-06/msg02065.html

Hopefully, someone will look at the patch soon...

> Also I wish I could make a number of clarifications and updates in the
> wiki, of issues that tripped me up for days.
>  
Yeah, please do! Do as Ian said for getting write access and then go
ahead.

Also, next Wednesday is going to be one of our Docs Day:
 http://lists.xen.org/archives/html/xen-devel/2014-06/msg02266.html
 http://wiki.xenproject.org/wiki/Xen_Document_Days

If you have time, I'd really recommend participating.

In the mean time, if there are issues that you've found in the docs, but
for any reason you can't fix them right away, consider adding them here,
so that they someone can take care of them during the event:
 http://wiki.xenproject.org/wiki/Xen_Document_Days/TODO

Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
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Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)


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