Messages in this thread | | | Date | Sun, 13 Feb 2022 07:03:10 +0100 | From | Paul Menzel <> | Subject | Set environment variable `KVM` makes build fail |
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Dear Linux folks,
Playing with rcutorture (`tools/testing/selftests/rcutorture/bin/torture.sh`), a Linux kernel build failed, because the script sets and exports the environment variable `KVM`. I was able to reproduce that manually (on x86_64):
$ make defconfig $ scripts/config -m KVM $ scripts/config -m KVM_INTEL $ scripts/config -d KVM_AMD $ scripts/config -d KVM_XEN $ scripts/config -d KVM_MMU_AUDIT $ export KVM=XXX $ make arch/x86/kvm/kvm.o […] LINK /dev/shm/linux-kvm/tools/objtool/objtool make[2]: *** No rule to make target 'arch/x86/kvm/XXX/kvm_main.o', needed by 'arch/x86/kvm/kvm.o'. Stop. make[1]: *** [scripts/Makefile.build:550: arch/x86/kvm] Error 2 make: *** [Makefile:1831: arch/x86] Error 2
The directory `arch/x86/kvm/XXX` is created somehow.
Is that expected? Do you know what is going on? I wasn’t able to reproduce this with other variables like `SND_HDA` for example.
Kind regards,
Paul
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