Public bug reported:

Impact:

On a generic amd64 environment, check out the Xenia/generic or
Bionic/generic tree, cd into it and execute snapcraft - it should build
the corresponding kernel snap.

linux $ snapcraft
...
  HOSTCC  scripts/mod/mk_elfconfig
/bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
scripts/Makefile.build:332: recipe for target 'scripts/mod/empty.o' failed
make[2]: *** [scripts/mod/empty.o] Error 127
make[2]: *** Waiting for unfinished jobs....
  HOSTLD  arch/x86/tools/relocs
  HOSTCC  scripts/selinux/genheaders/genheaders
  HOSTCC  scripts/selinux/mdp/mdp
scripts/Makefile.build:606: recipe for target 'scripts/mod' failed
make[1]: *** [scripts/mod] Error 2
make[1]: *** Waiting for unfinished jobs....
  CC      arch/x86/purgatory/purgatory.o
Makefile:589: recipe for target 'scripts' failed
make: *** [scripts] Error 2
make: *** Waiting for unfinished jobs....
  AS      arch/x86/purgatory/stack.o
/bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
scripts/Makefile.build:332: recipe for target 'arch/x86/purgatory/purgatory.o' 
failed
make[1]: *** [arch/x86/purgatory/purgatory.o] Error 127
make[1]: *** Waiting for unfinished jobs....
  AS      arch/x86/purgatory/setup-x86_64.o
/bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
scripts/Makefile.build:435: recipe for target 'arch/x86/purgatory/stack.o' 
failed
make[1]: *** [arch/x86/purgatory/stack.o] Error 127
/bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
scripts/Makefile.build:435: recipe for target 
'arch/x86/purgatory/setup-x86_64.o' failed
make[1]: *** [arch/x86/purgatory/setup-x86_64.o] Error 127
arch/x86/Makefile:260: recipe for target 'archprepare' failed
make: *** [archprepare] Error 2
Failed to run 'make -j4 bzImage modules' for 'kernel': Exited with code 2.
Verify that the part is using the correct parameters and try again.

Fix:
The retpoline-extract-one should be copied to the parts/build/script directory, 
apply the attached patch to let snapcraft do it before starting the kernel build

Regression risk:
None, since we are only patching the snapcraft.yaml file (and it didn't build 
in the first place).

---

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1782116

Title:
  snapcraft.yaml: missing ubuntu-retpoline-extract-one script breaks the
  build

Status in linux package in Ubuntu:
  New

Bug description:
  Impact:

  On a generic amd64 environment, check out the Xenia/generic or
  Bionic/generic tree, cd into it and execute snapcraft - it should
  build the corresponding kernel snap.

  linux $ snapcraft
  ...
    HOSTCC  scripts/mod/mk_elfconfig
  /bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
  scripts/Makefile.build:332: recipe for target 'scripts/mod/empty.o' failed
  make[2]: *** [scripts/mod/empty.o] Error 127
  make[2]: *** Waiting for unfinished jobs....
    HOSTLD  arch/x86/tools/relocs
    HOSTCC  scripts/selinux/genheaders/genheaders
    HOSTCC  scripts/selinux/mdp/mdp
  scripts/Makefile.build:606: recipe for target 'scripts/mod' failed
  make[1]: *** [scripts/mod] Error 2
  make[1]: *** Waiting for unfinished jobs....
    CC      arch/x86/purgatory/purgatory.o
  Makefile:589: recipe for target 'scripts' failed
  make: *** [scripts] Error 2
  make: *** Waiting for unfinished jobs....
    AS      arch/x86/purgatory/stack.o
  /bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
  scripts/Makefile.build:332: recipe for target 
'arch/x86/purgatory/purgatory.o' failed
  make[1]: *** [arch/x86/purgatory/purgatory.o] Error 127
  make[1]: *** Waiting for unfinished jobs....
    AS      arch/x86/purgatory/setup-x86_64.o
  /bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
  scripts/Makefile.build:435: recipe for target 'arch/x86/purgatory/stack.o' 
failed
  make[1]: *** [arch/x86/purgatory/stack.o] Error 127
  /bin/bash: ./scripts/ubuntu-retpoline-extract-one: No such file or directory
  scripts/Makefile.build:435: recipe for target 
'arch/x86/purgatory/setup-x86_64.o' failed
  make[1]: *** [arch/x86/purgatory/setup-x86_64.o] Error 127
  arch/x86/Makefile:260: recipe for target 'archprepare' failed
  make: *** [archprepare] Error 2
  Failed to run 'make -j4 bzImage modules' for 'kernel': Exited with code 2.
  Verify that the part is using the correct parameters and try again.

  Fix:
  The retpoline-extract-one should be copied to the parts/build/script 
directory, apply the attached patch to let snapcraft do it before starting the 
kernel build

  Regression risk:
  None, since we are only patching the snapcraft.yaml file (and it didn't build 
in the first place).

  ---

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