[Bug 1835764] Re: Multiple DKMS kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

[Daniel van Vugt]

*** This bug is a duplicate of bug 1830961 ***
    https://bugs.launchpad.net/bugs/1830961

** Also affects: gcc-9 (Ubuntu)
   Importance: Undecided
       Status: New

** Tags added: regression

** This bug has been marked a duplicate of bug 1830961
   9.1.0-3ubuntu1 prevents kernel & kernel module compilation on 19.10 due to enabled fcf-protection

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to gcc-9 in Ubuntu.
https://bugs.launchpad.net/bugs/1835764

Title:
  Multiple DKMS kernel drivers fail to build with gcc-9 [error:
  ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

Status in gcc-9 package in Ubuntu:
  New
Status in nvidia-graphics-drivers-430 package in Ubuntu:
  Confirmed
Status in virtualbox package in Ubuntu:
  Confirmed

Bug description:
  DKMSKernelVersion: 5.0.0-20-generic
  Date: Mon Jul  8 13:11:52 2019
  DuplicateSignature: dkms:virtualbox-dkms:6.0.8-dfsg-7:./include/linux/compiler.h:192:1: error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible
  Package: virtualbox-dkms 6.0.8-dfsg-7
  PackageVersion: 6.0.8-dfsg-7
  SourcePackage: virtualbox
  Title: virtualbox-dkms 6.0.8-dfsg-7: virtualbox kernel module failed to build

  ----

  # LANG=C apt-cache policy gcc
  gcc:
    Installed: 4:9.1.0-1ubuntu4
    Candidate: 4:9.1.0-1ubuntu4
    Version table:
   *** 4:9.1.0-1ubuntu4 500
          500 http://archive.ubuntu.com/ubuntu eoan/main amd64 Packages
          100 /var/lib/dpkg/status
  ---

  # LANG=C lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu Eoan Ermine (development branch)
  Release:        19.10
  Codename:       eoan

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gcc-9/+bug/1835764/+subscriptions