configure.ac:91: error: possibly undefined macro: AC_SEARCH_LIBS

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~~