pahole编译过程libbpf: failed to find valid kernel BTF

下载源码：

git clone https://kernel.googlesource.com/pub/scm/devel/pahole/pahole

下载libbpf源码：

git clone https://github.com/libbpf/libbpf

屏蔽pahole下CMakeLists.txt相关代码

+++ b/CMakeLists.txt
@@ -35,26 +35,6 @@ find_package(DWARF REQUIRED)
 find_package(ZLIB REQUIRED)

 # make sure git submodule(s) are checked out
-find_package(Git QUIET)
-if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
-       # Update submodules as needed
-       option(GIT_SUBMODULE "Check submodules during build" ON)
-       if(GIT_SUBMODULE)
-               message(STATUS "Submodule update")
-               execute_process(COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive
-                               WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-                               RESULT_VARIABLE GIT_SUBMOD_RESULT)
-               if(NOT GIT_SUBMOD_RESULT EQUAL "0")
-                       message(FATAL_ERROR "git submodule update --init failed with ${GIT_SUBMOD_RESULT}, please checkout submodules")
-               else()
-                       message(STATUS "Submodule update - done")
-               endif()
-       endif()
-endif()
-if(NOT EXISTS "${PROJECT_SOURCE_DIR}/lib/bpf/src/btf.h")
-       message(FATAL_ERROR "The submodules were not downloaded! GIT_SUBMODULE was turned off or failed. Please update submodules and try again.")
-endif()
-

　　

创建mkdir lib/bpf目录，将libbpf源码拷贝到该目录下

编译：

    mkdir build
    cd build
    cmake -D__LIB=lib .. 
    make 
    make install