[Bug 1952448] Re: qemu 1:6.0+dfsg-2expubuntu2: Fail to build against OpenSSL 3.0

[Paride Legovini]

** Also affects: qemu
   Importance: Undecided
       Status: New

** No longer affects: qemu

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https://bugs.launchpad.net/bugs/1952448

Title:
  qemu 1:6.0+dfsg-2expubuntu2: Fail to build against OpenSSL 3.0

Status in qemu package in Ubuntu:
  Triaged

Bug description:
  Issue discovered after doing a "No-change rebuild" upload to Jammy
  while working at the liburing2 migration (LP: #1944037).

  Full build log:

  https://launchpadlibrarian.net/570888790/buildlog_ubuntu-jammy-
  amd64.qemu_1%3A6.0+dfsg-2expubuntu3_BUILDING.txt.gz

  Failure mode:

  /<<BUILDDIR>>/qemu-6.0+dfsg/roms/skiboot/libstb/create-container.c: In 
function ‘getPublicKeyRaw’:
  /<<BUILDDIR>>/qemu-6.0+dfsg/roms/skiboot/libstb/create-container.c:85:17: 
error: ‘EVP_PKEY_get1_EC_KEY’ is deprecated: Since OpenSSL 3.0 
[-Werror=deprecated-declarations]

  Also note that:

  cc1: all warnings being treated as errors

  Upstream skiboot [1] still uses EVP_PKEY_get1_EC_KEY in master, and
  don't have an open issue about this. To be filed once we setup a
  reproducer that builds skiboot "standalone", outside of the qemu
  source tree.

  For the moment we have to relax the severity of that deprecation
  error, likely appending a -Wno-deprecated-declarations somewhere in
  d/rules.

  
  [1] https://github.com/open-power/skiboot

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