无法编译，显示缺少#include "config.h"

[QingJu-Finger]

编译build.sh文件时显示
/xxx/bfs-master/thirdsrc/gflags-2.1.1/src/gflags.cc:90:10: fatal error: config.h: No such file or directory
#include "config.h"
^~~~~~~~~~
compilation terminated.