1713c3c344
>From patch [1] included in kernel >= 5.0: "The upcoming GCC 9 release extends the -Wmissing-attributes warnings (enabled by -Wall) to C and aliases: it warns when particular function attributes are missing in the aliases but not in their target. In particular, it triggers for all the init/cleanup_module aliases in the kernel (defined by the module_init/exit macros), ending up being very noisy. These aliases point to the __init/__exit functions of a module, which are defined as __cold (among other attributes). However, the aliases themselves do not have the __cold attribute. Since the compiler behaves differently when compiling a __cold function as well as when compiling paths leading to calls to __cold functions, the warning is trying to point out the possibly-forgotten attribute in the alias." Werror is set by default while building ppc kernel [2], but some warning can be introduced while building current kernel with newer compiler (for example building kernel 4.19 with gcc 9.1). For the same reason why we remove Werror in packages's compiler flags. Building with Werror is not bulletproof when we start using a newer compiler that introduce new warnings. This is the case here. Also this option is a bit strange since it's specific to ppc kernels: "The intention is to make it harder for people to inadvertantly introduce warnings in the arch/powerpc code." Other kernel developers on other arch may be interested by a similar/more generic option. So, It's clearly intended for kernel developers. Instead of backporting this patch [1] to kernel 4.19, select unconditionally the Kconfig option CONFIG_PPC_DISABLE_WERROR that allow to disable Werror. Fixes: https://gitlab.com/kubu93/toolchains-builder/-/jobs/205435741 [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=a6e60d84989fa0e91db7f236eda40453b0e44afa [2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=ba55bd74360ea4b8b95e73ed79474d37ff482b36 [3] https://gitlab.com/bootlin/toolchains-builder Fix-suggested-by: Yann E. MORIN <yann.morin.1998@free.fr> Signed-off-by: Romain Naour <romain.naour@gmail.com> Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> |
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| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .defconfig | ||
| .flake8 | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .gitlab-ci.yml.in | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.legacy | ||
| README | ||
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches