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When I use the command 'make M=samples/bpf' to compile samples/bpf code in ubuntu 22.04, the error info occured: Cannot find a vmlinux for VMLINUX_BTF at any of " /home/ubuntu/code/linux/vmlinux", build the kernel or set VMLINUX_BTF or VMLINUX_H variable Others often encounter this kind of issue, new kernel has the vmlinux, so we can set the path in error info which seems more intuitive, like: Cannot find a vmlinux for VMLINUX_BTF at any of " /home/ubuntu/code/linux/vmlinux", buiild the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable Signed-off-by: Tao Chen <chen.dylane@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240428161032.239043-1-chen.dylane@gmail.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.