** Description changed: + SRU Justification: + ================== + + [Impact] + + * With focal (and even eoan) it is no longer possible to run the + updateconfigs Debian build rule (needed in case of kernel option + updates) on all supported arhitectures. + + * Changes upstream led to the fact cross platform functions are now + triggered in case the config is changed, but amd64 is the only platform + that has all needed crossbuild components to satisfy this. + + * Hence one can still run updateconfigs on amd64 and proceed with the + compile on the target platform. + + * With bionic and earlier this was possible on all supported target + platforms; now it only works on amd64. + + * But it's not always the case that people who work on Ubuntu for non- + amd64 have an Ubuntu amd64 on top, nor would such a requirement be + acceptable. + + [Fix] + + * Patch: + https://bugs.launchpad.net/ubuntu-z-systems/+bug/1863116/+attachment/5397080/+files/0001 + -UBUNTU-Packaging-kernelconfig-only-update-edit-confi.patch + + [Test Case] + + * Setup an Ubuntu 20.04 on a platform other than amd64 (like in my case + s390x) and install all packages needed for a kernel build. + + * 'git clone' or 'pull-lp-source' the kernel sources to that system + (e.g. focal). + + * Change a kernel config option and run clean (fakeroot debian/rules + clean), updateconfigs (fakeroot debian/rules updateconfigs) followed by + a build (like: fakeroot debian/rules binary-headers binary-generic + binary-perarch). + + * Without the patch the build will fail with error messages similar to these: + scripts/Kconfig.include:35: compiler 'x86_64-linux-gnu-gcc' not found + make[3]: *** [../scripts/kconfig/Makefile:73: syncconfig] Error 1 + make[2]: *** [/home/ubuntu/linux-5.4-5.4.0/Makefile:594: syncconfig] Error 2 + make[2]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0/build' + make[1]: *** [Makefile:179: sub-make] Error 2 + make[1]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0' + make: *** [debian/rules.d/1-maintainer.mk:44: editconfigs] Error 2 + + * Doing the same on a non-amd64 with the patch in place (or on amd64 + even w/o the patch), the build will succeed. + + [Regression Potential] + + * The regression risk is moderate since it's build time problem (not at + kernel run time). + + * But anyway in case this patch is broken, kernel builds may be screwed + up entirely, + + * but that is very unlikely since the modifications are limited to + /debian/scripts/misc/kernelconfig. + + * Hence issues in kernelconfig could occur and even break updateconfigs + on amd64. + + * But the patch was successully tested on different architectures with + focal. + + [Other] + + * Patch need to be applied to focal and higher (hence incl. groovy). + __________ + On s390x pull-lp-source linux-5.4 cd linux-* fakeroot ./debian/rules clean ./debian/rules editconfig dh_testdir; /bin/bash -e debian/scripts/misc/kernelconfig editconfigs Do you want to edit config: amd64/config.flavour.generic? [Y/n] n ... scripts/Kconfig.include:35: compiler 'x86_64-linux-gnu-gcc' not found make[3]: *** [../scripts/kconfig/Makefile:73: syncconfig] Error 1 make[2]: *** [/home/ubuntu/linux-5.4-5.4.0/Makefile:594: syncconfig] Error 2 make[2]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0/build' make[1]: *** [Makefile:179: sub-make] Error 2 make[1]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0' make: *** [debian/rules.d/1-maintainer.mk:44: editconfigs] Error 2 And indeed i do not have x86_64-linux-gnu-gcc crosscompiler available to build on s390x for amd64, and also I don't want to touch amd64 configs. Only s390x ones. As a user, I should be able to rebuild ports architecture kernel with tweaked config for testing, self-hosted without cross-compilers.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1863116 Title: debian/rules editconfigs does not work on s390x to change s390x only configs Status in Ubuntu on IBM z Systems: Confirmed Status in linux package in Ubuntu: Fix Committed Status in linux source package in Focal: Triaged Status in linux source package in Groovy: Fix Committed Bug description: SRU Justification: ================== [Impact] * With focal (and even eoan) it is no longer possible to run the updateconfigs Debian build rule (needed in case of kernel option updates) on all supported arhitectures. * Changes upstream led to the fact cross platform functions are now triggered in case the config is changed, but amd64 is the only platform that has all needed crossbuild components to satisfy this. * Hence one can still run updateconfigs on amd64 and proceed with the compile on the target platform. * With bionic and earlier this was possible on all supported target platforms; now it only works on amd64. * But it's not always the case that people who work on Ubuntu for non- amd64 have an Ubuntu amd64 on top, nor would such a requirement be acceptable. [Fix] * Patch: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1863116/+attachment/5397080/+files/0001 -UBUNTU-Packaging-kernelconfig-only-update-edit-confi.patch [Test Case] * Setup an Ubuntu 20.04 on a platform other than amd64 (like in my case s390x) and install all packages needed for a kernel build. * 'git clone' or 'pull-lp-source' the kernel sources to that system (e.g. focal). * Change a kernel config option and run clean (fakeroot debian/rules clean), updateconfigs (fakeroot debian/rules updateconfigs) followed by a build (like: fakeroot debian/rules binary-headers binary-generic binary-perarch). * Without the patch the build will fail with error messages similar to these: scripts/Kconfig.include:35: compiler 'x86_64-linux-gnu-gcc' not found make[3]: *** [../scripts/kconfig/Makefile:73: syncconfig] Error 1 make[2]: *** [/home/ubuntu/linux-5.4-5.4.0/Makefile:594: syncconfig] Error 2 make[2]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0/build' make[1]: *** [Makefile:179: sub-make] Error 2 make[1]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0' make: *** [debian/rules.d/1-maintainer.mk:44: editconfigs] Error 2 * Doing the same on a non-amd64 with the patch in place (or on amd64 even w/o the patch), the build will succeed. [Regression Potential] * The regression risk is moderate since it's build time problem (not at kernel run time). * But anyway in case this patch is broken, kernel builds may be screwed up entirely, * but that is very unlikely since the modifications are limited to /debian/scripts/misc/kernelconfig. * Hence issues in kernelconfig could occur and even break updateconfigs on amd64. * But the patch was successully tested on different architectures with focal. [Other] * Patch need to be applied to focal and higher (hence incl. groovy). __________ On s390x pull-lp-source linux-5.4 cd linux-* fakeroot ./debian/rules clean ./debian/rules editconfig dh_testdir; /bin/bash -e debian/scripts/misc/kernelconfig editconfigs Do you want to edit config: amd64/config.flavour.generic? [Y/n] n ... scripts/Kconfig.include:35: compiler 'x86_64-linux-gnu-gcc' not found make[3]: *** [../scripts/kconfig/Makefile:73: syncconfig] Error 1 make[2]: *** [/home/ubuntu/linux-5.4-5.4.0/Makefile:594: syncconfig] Error 2 make[2]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0/build' make[1]: *** [Makefile:179: sub-make] Error 2 make[1]: Leaving directory '/home/ubuntu/linux-5.4-5.4.0' make: *** [debian/rules.d/1-maintainer.mk:44: editconfigs] Error 2 And indeed i do not have x86_64-linux-gnu-gcc crosscompiler available to build on s390x for amd64, and also I don't want to touch amd64 configs. Only s390x ones. As a user, I should be able to rebuild ports architecture kernel with tweaked config for testing, self-hosted without cross-compilers. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1863116/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
