Re: Xen compile error

[Bertrand Marquis <Bertrand.Marquis@xxxxxxx>]

Hi,

> On 8 Oct 2020, at 13:28, ba1020@xxxxxxxxxxxxx wrote:
> 
> i try to compile the lates Release 4.14.0 and get stuck here
> 

It would be nice to start a mail saying Hi and signing it :-)

You are probably using a new compiler version (10.0 or newer).

You have 2 solutions:
- you a master version of Xen
- fix libxlu_pci.c at line 51 like this:
unsigned dom = 0, bus = 0, dev = 0, func = 0, vslot =0;

Please confirm me if this works.

Cheers
Bertrand

> 
> 
> 
> libxlu_pci.c: In function ‘xlu_pci_parse_bdf’:
> libxlu_pci.c:32:18: error: ‘func’ may be used uninitialized in this function 
> [-Werror=maybe-uninitialized]
>   32 |     pcidev->func = func;
>      |     ~~~~~~~~~~~~~^~~~~~
> libxlu_pci.c:51:29: note: ‘func’ was declared here
>   51 |     unsigned dom, bus, dev, func, vslot = 0;
>      |                             ^~~~
> libxlu_pci.c:31:17: error: ‘dev’ may be used uninitialized in this function 
> [-Werror=maybe-uninitialized]
>   31 |     pcidev->dev = dev;
>      |     ~~~~~~~~~~~~^~~~~
> libxlu_pci.c:51:24: note: ‘dev’ was declared here
>   51 |     unsigned dom, bus, dev, func, vslot = 0;
>      |                        ^~~
> libxlu_pci.c:30:17: error: ‘bus’ may be used uninitialized in this function 
> [-Werror=maybe-uninitialized]
>   30 |     pcidev->bus = bus;
>      |     ~~~~~~~~~~~~^~~~~
> libxlu_pci.c:51:19: note: ‘bus’ was declared here
>   51 |     unsigned dom, bus, dev, func, vslot = 0;
>      |                   ^~~
> libxlu_pci.c:29:20: error: ‘dom’ may be used uninitialized in this function 
> [-Werror=maybe-uninitialized]
>   29 |     pcidev->domain = domain;
>      |     ~~~~~~~~~~~~~~~^~~~~~~~
> libxlu_pci.c:51:14: note: ‘dom’ was declared here
>   51 |     unsigned dom, bus, dev, func, vslot = 0;
>      |              ^~~
> cc1: all warnings being treated as errors
> make[5]: *** [/home/adminjs/xen/tools/libxl/../../tools/Rules.mk:216: 
> libxlu_pci.o] Error 1
> make[5]: *** Waiting for unfinished jobs....
> make[5]: Leaving directory '/home/adminjs/xen/tools/libxl'
> make[4]: *** [/home/adminjs/xen/tools/../tools/Rules.mk:240: 
> subdir-install-libxl] Error 2
> make[4]: Leaving directory '/home/adminjs/xen/tools'
> make[3]: *** [/home/adminjs/xen/tools/../tools/Rules.mk:235: subdirs-install] 
> Error 2
> make[3]: Leaving directory '/home/adminjs/xen/tools'
> make[2]: *** [Makefile:72: install] Error 2
> make[2]: Leaving directory '/home/adminjs/xen/tools'
> make[1]: *** [Makefile:134: install-tools] Error 2
> make[1]: Leaving directory '/home/adminjs/xen'
> make: *** [Makefile:170: world] Error 2
> 
> 
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