[PATCH v3 bpf-next] Add CONFIG_DEBUG_INFO_BTF check to bpftool feature command

[grantseltzer]

This adds the CONFIG_DEBUG_INFO_BTF kernel compile option to output of
the bpftool feature command. This is relevant for developers that want
to use libbpf to account for data structure definition differences
between kernels.

Signed-off-by: grantseltzer <grantselt...@gmail.com>
---
 tools/bpf/bpftool/feature.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c
index 359960a8f..b90cc6832 100644
--- a/tools/bpf/bpftool/feature.c
+++ b/tools/bpf/bpftool/feature.c
@@ -336,6 +336,8 @@ static void probe_kernel_image_config(const char 
*define_prefix)
                { "CONFIG_BPF_JIT", },
                /* Avoid compiling eBPF interpreter (use JIT only) */
                { "CONFIG_BPF_JIT_ALWAYS_ON", },
+               /* Kernel BTF debug information available */
+               { "CONFIG_DEBUG_INFO_BTF", },
 
                /* cgroups */
                { "CONFIG_CGROUPS", },
-- 
2.29.2