[Bug 1988710] Re: qemu FTBFS with GCC 12

[Christian Ehrhardt ]

Since I have not found this issue in qemu, gcc nor palcode I have filed
it for some more awareness than just this LP report.

- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106966
- https://github.com/qemu/qemu-palcode/issues/1

FYI I have in the meantime also recreated this in more release/versions:
- Bad:  Kinetic - default cross gcc - gcc version 12.2.0 (Ubuntu 12.2.0-2ubuntu1) 
- Bad: Jammy - cross gcc-12 - gcc version 11.3.0 (Ubuntu 11.3.0-1ubuntu1~22.04) 
- Bad: Fedora 36 - cross gcc - gcc version 12.1.1 20220507 (Red Hat Cross 12.1.1-1) (GCC) 
- Good: Jammy - default cross gcc - gcc version 12.2.0 (Ubuntu 12.2.0-2ubuntu1) 

** Bug watch added: GCC Bugzilla #106966
   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106966

** Bug watch added: github.com/qemu/qemu-palcode/issues #1
   https://github.com/qemu/qemu-palcode/issues/1

** Also affects: gcc via
   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106966
   Importance: Unknown
       Status: Unknown

** Changed in: qemu (Ubuntu)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1988710

Title:
  qemu FTBFS with GCC 12

Status in gcc:
  New
Status in gcc-12 package in Ubuntu:
  New
Status in qemu package in Ubuntu:
  In Progress

Bug description:
  qemu 1:7.0+dfsg-7ubuntu1 FTBFS on Kinetic due to an extra warning
  emitted by gcc 12:

  ----------------

  In function ‘ppc64_patch_handlers’,
      inlined from ‘cpu_970_init’ at /<<PKGBUILDDIR>>/roms/openbios/arch/ppc/qemu/init.c:433:5:
  /<<PKGBUILDDIR>>/roms/openbios/arch/ppc/qemu/init.c:400:10: error: array subscript 0 is outside array bounds of ‘uint32_t[0]’ {aka ‘unsigned int[]’} [-Werror=array-bounds]
    400 |     *dsi = 0x48002002;
        |     ~~~~~^~~~~~~~~~~~
  /<<PKGBUILDDIR>>/roms/openbios/arch/ppc/qemu/init.c:403:10: error: array subscript 0 is outside array bounds of ‘uint32_t[0]’ {aka ‘unsigned int[]’} [-Werror=array-bounds]
    403 |     *isi = 0x48002202;
        |     ~~~~~^~~~~~~~~~~~

  [...]

  cc1: all warnings being treated as errors
  make[3]: *** [rules.mak:323: target/arch/ppc/qemu/init.o] Error 1

  ----------------

  Test rebuild done in this PPA:

    https://launchpad.net/~paride/+archive/ubuntu/qemu-nochange

  Full build log:

    https://launchpadlibrarian.net/621778341/buildlog_ubuntu-kinetic-
  amd64.qemu_1%3A7.0+dfsg-7ubuntu1~kineticppa1_BUILDING.txt.gz

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