Can't compile qemu because of errors in the Xen code

[Leo]

I'm using Arch Linux, with all needed libs packages installed via ABS (compiled from source).
I tried to clone the master repository, the v2.5.0 and the stable-2.4.0, all I had the same problems:

First I have to disable -Werror, because it claims about some uninitialized variables.

Trying to compile the code, it stops when compiling the xen code (hw/block/xendisk.o), complaining that ioservid_t is declared twice, first as 16bit and then as 32bit.

Output of make:

  CC hw/block/xen_disk.o
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h:198:18: error: conflicting types for ‘ioservid_t’
 typedef uint16_t ioservid_t;
                  ^
In file included from /usr/include/xenctrl.h:37:0,
                 from /home/leo/qemu/include/hw/xen/xen_common.h:9,
                 from /home/leo/qemu/include/hw/xen/xen_backend.h:4,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/usr/include/xen/xen.h:353:18: note: previous declaration of ‘ioservid_t’ was here
 typedef uint32_t ioservid_t;
                  ^
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h: In function ‘xen_get_ioreq_server_info’:
/home/leo/qemu/include/hw/xen/xen_common.h:256:36: error: ‘HVM_PARAM_IOREQ_PFN’ undeclared (first use in this function)
     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_IOREQ_PFN, &param);
                                    ^
/home/leo/qemu/include/hw/xen/xen_common.h:256:36: note: each undeclared identifier is reported only once for each function it appears in
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h:264:36: error: ‘HVM_PARAM_BUFIOREQ_PFN’ undeclared (first use in this function)
     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_PFN, &param);
                                    ^
/home/leo/qemu/rules.mak:57: recipe for target 'hw/block/xen_disk.o' failed
make: *** [hw/block/xen_disk.o] Error 1
[leo@AlphaArch build]$ make
  CC hw/block/xen_disk.o
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h:198:18: error: conflicting types for ‘ioservid_t’
 typedef uint16_t ioservid_t;
                  ^
In file included from /usr/include/xenctrl.h:37:0,
                 from /home/leo/qemu/include/hw/xen/xen_common.h:9,
                 from /home/leo/qemu/include/hw/xen/xen_backend.h:4,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/usr/include/xen/xen.h:353:18: note: previous declaration of ‘ioservid_t’ was here
 typedef uint32_t ioservid_t;
                  ^
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h: In function ‘xen_get_ioreq_server_info’:
/home/leo/qemu/include/hw/xen/xen_common.h:256:36: error: ‘HVM_PARAM_IOREQ_PFN’ undeclared (first use in this function)
     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_IOREQ_PFN, &param);
                                    ^
/home/leo/qemu/include/hw/xen/xen_common.h:256:36: note: each undeclared identifier is reported only once for each function it appears in
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h:264:36: error: ‘HVM_PARAM_BUFIOREQ_PFN’ undeclared (first use in this function)
     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_PFN, &param);
                                    ^
/home/leo/qemu/rules.mak:57: recipe for target 'hw/block/xen_disk.o' failed
make: *** [hw/block/xen_disk.o] Error 1
[leo@AlphaArch build]$ make
  CC hw/block/xen_disk.o
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h:198:18: error: conflicting types for ‘ioservid_t’
 typedef uint16_t ioservid_t;
                  ^
In file included from /usr/include/xenctrl.h:37:0,
                 from /home/leo/qemu/include/hw/xen/xen_common.h:9,
                 from /home/leo/qemu/include/hw/xen/xen_backend.h:4,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/usr/include/xen/xen.h:353:18: note: previous declaration of ‘ioservid_t’ was here
 typedef uint32_t ioservid_t;
                  ^
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h: In function ‘xen_get_ioreq_server_info’:
/home/leo/qemu/include/hw/xen/xen_common.h:256:36: error: ‘HVM_PARAM_IOREQ_PFN’ undeclared (first use in this function)
     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_IOREQ_PFN, &param);
                                    ^
/home/leo/qemu/include/hw/xen/xen_common.h:256:36: note: each undeclared identifier is reported only once for each function it appears in
In file included from /home/leo/qemu/include/hw/xen/xen_backend.h:4:0,
                 from /home/leo/qemu/hw/block/xen_disk.c:39:
/home/leo/qemu/include/hw/xen/xen_common.h:264:36: error: ‘HVM_PARAM_BUFIOREQ_PFN’ undeclared (first use in this function)
     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_PFN, &param);
                                    ^
/home/leo/qemu/rules.mak:57: recipe for target 'hw/block/xen_disk.o' failed
make: *** [hw/block/xen_disk.o] Error 1

[pranith (bobby-prani)]

Can you post the `configure` command line you used when you try to compile?

[Leo (l-andro-cs)]

Hello pranith,

  Well, as I'm using the "ABS" system from Arch Linux, I had to study how it compile things, but I found it:

./configure --prefix=/usr --sysconfdir=/etc --audio-drv-list='pa alsa sdl' \
              --python=/usr/bin/python2 --smbd=/usr/bin/smbd \
              --enable-docs --libexecdir=/usr/lib/qemu \
              --disable-gtk --enable-linux-aio --enable-seccomp \
              --enable-spice --localstatedir=/var \
              --enable-tpm \
              --enable-modules --enable-{rbd,glusterfs,libiscsi,curl}

Then I downloaded a copy of qemu with git and I run the configure help (configure --help), then I saw that I can "enable/disable" xen, so I added the ---disable-xen to the above line in the PKGBUILD file from ABS and it compiled.
So, on **my** box I just had to disable Xen as I don't use it.
Thank you for your help.

[pranith (bobby-prani)]

OK. I am closing this then. :)