debian系统上，手动编译tmux的时候，执行./autogen.sh出现如下报错：
$ ./autogen.sh configure.ac:91: error: possibly undefined macro: AC_SEARCH_LIBS If this token and others are legitimate, please use m4_pattern_allow. See the Autoconf documentation. autoreconf: /usr/bin/autoconf failed with exit status: 1 autoreconf failed
执行如下命令：
$ sudo apt-get install pkg-config
重新执行./autogen.sh，成功~~