From: Tao Chen Date: Sun, 28 Apr 2024 16:10:32 +0000 (+0800) Subject: samples/bpf: Add valid info for VMLINUX_BTF X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=397658ddc88ce3c21d2aa3bed8e15fc69dfec946;p=linux.git samples/bpf: Add valid info for VMLINUX_BTF 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 Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20240428161032.239043-1-chen.dylane@gmail.com --- diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 933f6c3fe6b04..9aa027b144df6 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -337,7 +337,7 @@ $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) ifeq ($(VMLINUX_H),) ifeq ($(VMLINUX_BTF),) $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\ - build the kernel or set VMLINUX_BTF or VMLINUX_H variable) + build the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable) endif $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ else