Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx> writes: > Generate vmlinux.h only from the in-tree vmlinux, and remove enum > declarations that would cause a build failure in case of version > mismatches. > > There are now two options when building the samples: > 1. Compile the kernel to use in-tree vmlinux for vmlinux.h > 2. Override VMLINUX_BTF for samples using something like this: > make VMLINUX_BTF=/sys/kernel/btf/vmlinux -C samples/bpf > > This change was tested with relative builds, e.g. cases like: > * make O=build -C samples/bpf > * make KBUILD_OUTPUT=build -C samples/bpf > * make -C samples/bpf > * cd samples/bpf && make > > When a suitable VMLINUX_BTF is not found, the following message is > printed: > /home/kkd/src/linux/samples/bpf/Makefile:333: *** Cannot find a vmlinux > for VMLINUX_BTF at any of " ./vmlinux", build the kernel or set > VMLINUX_BTF variable. Stop. > > Cc: Toke Høiland-Jørgensen <toke@xxxxxxxxxx> > Fixes: 384b6b3bbf0d (samples: bpf: Add vmlinux.h generation support) > Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx> Acked-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
