你好，我在编译 lego_loam_sr 的时候一直失败 #7
Description
/home/lee/dev_ws/src/LeGO-LOAM-ROS2/LeGO-LOAM/src/mapOptmization.cpp:128:22: note: in C++11 and above a default constructor can be explicit
gmake[2]: *** [CMakeFiles/lego_loam_sr.dir/build.make:132：CMakeFiles/lego_loam_sr.dir/src/main.cpp.o] 错误 1
gmake[2]: *** 正在等待未完成的任务....
gmake[2]: *** [CMakeFiles/lego_loam_sr.dir/build.make:104：CMakeFiles/lego_loam_sr.dir/src/mapOptmization.cpp.o] 错误 1
gmake[1]: *** [CMakeFiles/Makefile2:137：CMakeFiles/lego_loam_sr.dir/all] 错误 2
gmake: *** [Makefile:146：all] 错误 2
Failed <<< lego_loam_sr [45.4s, exited with code 2]
Summary: 1 package finished [46.9s]
1 package failed: lego_loam_sr
1 package had stderr output: lego_loam_sr
这是为什么呀