Comment # 9 on bug 1207558 from Stefan Dirsch

There is no gcc12-c++ package available when building against
openSUSE_Leap_15.4. It is when building against openSUSE_Leap_15.5 though. So I
simply can't verify whether using gcc12 would help.

# osc meta prj X11:XOrg
  <repository name="openSUSE_Leap_15.5">
    <path project="openSUSE:Leap:15.5" repository="standard"/>
    <arch>x86_64</arch>
    <arch>i586</arch>
    <arch>aarch64</arch>
  </repository>
  <repository name="openSUSE_Leap_15.4">
    <path project="openSUSE:Leap:15.4" repository="standard"/>
    <arch>x86_64</arch>
    <arch>i586</arch>
    <arch>aarch64</arch>
  </repository>