On Sun, Aug 29, 2021 at 6:49 PM Bryan Brattlof <hello@xxxxxxxxxxxxxxxxx> wrote: > > On this day, August 29, 2021, thus sayeth Krish Jain: > > > > > > > > Hi, what option do you mean? I already ran make allmodconfig and sudo > > > > make modules_install install and then make "CCFLAGS=-Werror W=1 > > > > M=drivers/staging/android/" and now I do get output but one line > > > > "WARNING: Symbol version dump "Module.symvers" is missing. Modules may > > > > not have dependencies or modversions. You may get many unresolved > > > > symbol warnings." . Then I tried "make CCFLAGS=-Werror V=1 > > > > M=drivers/staging/android/" and that outputted the following: > > > > > > > > > > Most of the answers you're asking for are going to get vague responses > > > (if any) on the mailing lists. The idea being (and I agree with) that > > > giving out the answers will steal your opportunity to explore and learn > > > the material yourself. > > > > > > Yes, it would be faster if we told you the answer, but ultimately, we > > > would be doing a disservice to you. > > > > > > Besides, more times than not we (me especially) don't have the answer. > > > > > > With that said, I will give a (generous) hint. :) > > > > > > > Hi. Do I have to build the kernel once before this works? Or can I > > just build a module directly? > > > > Again, do not allow others to rob you of learning how to solve these > issues yourself. I *strongly* encourage you to familiarize yourself with > the Kernel Build System in the Documentation. > > https://www.kernel.org/doc/html/latest/kbuild/modules.html > > Specifically the first paragraph of "2. How to Build External Modules" > > It may seem like a lot for such a simple issue but it *is* worth it. > ~Bryan > That section says "To build external modules, *you must have a prebuilt kernel available* that contains the configuration and header files used in the build. Also, the kernel must have been built with modules enabled. If you are using a distribution kernel, there will be a package for the kernel you are running provided by your distribution. An alternative is to use the “make” target “modules_prepare.” This will make sure the kernel contains the information required. The target exists solely as a simple way to prepare a kernel source tree for building external modules. NOTE: “modules_prepare” will not build Module.symvers even if CONFIG_MODVERSIONS is set; therefore, *a full kernel build needs to be executed to make module versioning work.*" So I am just trying to confirm with you whether I have to first build the kernel with like "make" or not? As you can imagine my hardware takes *very* long to build a kernel as I did in my last attempt so I am asking whether it is needed. Hope you understand. Best Regards
