问题1：交叉编译失败
Makefile:509:***warning No libdw.h found or old libdw.h found, disables dwarf support. Please install elfutils-devel/elfutils-dev Makefile:509:***warning No libdw.h f
阅读背景：
慢慢欣赏linux perf编译_shipinsky的博客_perf编译
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