document the release info related to libbpf submodule
Fix issue
In INSTALL.md document that source code with libbpf submodule
will be released as well for each bcc release in the future.
@@ -221,6 +221,16 @@ sudo yum install bcc
# Source
+## libbpf Submodule
+
+Since release v0.10.0, bcc starts to leverage libbpf repo (https://github.com/libbpf/libbpf)
+to provide wrapper functions to the kernel for bpf syscalls, uapi headers bpf.h/btf.h etc.
+Unfortunately, the default github release source code does not contain libbpf submodule
+source code and this will cause build issues.
+
+To alleviate this problem, starting at release v0.11.0, source code with corresponding
+libbpf submodule codes will be released as well. See https://github.com/iovisor/bcc/releases.
+
## Debian - Source
### Jessie
#### Repositories
