On Fri, Jun 28, 2024 at 2:14 AM Edgecombe, Rick P <rick.p.edgecombe@xxxxxxxxx> wrote: > > On Fri, 2024-05-10 at 04:36 +0900, Masahiro Yamada wrote: > > > > Or, fix the code. > > > > > > Now fixed. Thanks for the report. > > > > Hi, > > This commit broke my build in a similar way: > make ARCH=x86_64 O=../linux-tdx-kvm-out/ -j36 M=arch/x86/kvm/ > make[1]: Entering directory '/home/rpedgeco/repos/linux-tdx-kvm-out' > /home/rpedgeco/repos/linux/scripts/Makefile.build:41: arch/x86/kvm/Makefile: No > such file or directory > make[3]: *** No rule to make target 'arch/x86/kvm/Makefile'. Stop. > make[2]: *** [/home/rpedgeco/repos/linux/Makefile:1934: arch/x86/kvm] Error 2 > make[1]: *** [/home/rpedgeco/repos/linux/Makefile:240: __sub-make] Error 2 > make[1]: Leaving directory '/home/rpedgeco/repos/linux-tdx-kvm-out' > make: *** [Makefile:240: __sub-make] Error 2 > > This patch didn’t fix it: > https://lore.kernel.org/lkml/20240624-kbuild-fix-xconfig-v1-1-7c06eae6d3aa@xxxxxx/ > > But reverting b1992c3772e6 ("kbuild: use $(src) instead of $(srctree)/$(src) for > source directory") does. > > I'm guess it has something to do with the "M=" option because: > make ARCH=x86_64 O=../linux-tdx-kvm-out/ -j36 arch/x86/kvm/kvm.ko > arch/x86/kvm/kvm-intel.ko > > ...works. There are two solutions, depending on what you want to achieve. The official way is to pass the absolute path to M= (or relative path to ../linux-tdm-kvm-out) The other unofficial way is to pass VPATH. The external module build does not officially support the separate output directory, but you can still do it in this case. [1] will work like before. [1] Output module objects to linux-tdm-kvm-out/arch/x86/kvm/ (unofficial) $ make ARCH=x86_64 O=../linux-tdx-kvm-out/ -j36 M=arch/x86/kvm VPATH=$(pwd) [2] Output the module objects into arch/x86/kvm/ of the source tree (official) $ make ARCH=x86_64 O=../linux-tdx-kvm-out/ -j36 M=$(realpath arch/x86/kvm) -- Best Regards Masahiro Yamada
