some problems are as follows:

tip_main.cpp: 在函数'double marker_dist(MyMarker, MyMarker)'中:
tip_main.cpp:3720:8: 错误：'double marker_dist(MyMarker, MyMarker)' 重定义
double marker_dist(MyMarker a, MyMarker b)
^
tip_main.cpp:27:8: 错误：'double marker_dist(MyMarker, MyMarker)'已在此定义过
double marker_dist(MyMarker a, MyMarker b)
^
tip_main.cpp: 在函数'MyMarker over_traced_node(QPair, double)'中:
tip_main.cpp:3725:10: 错误：'MyMarker over_traced_node(QPair, double)' 重定义
MyMarker over_traced_node(QPair< MyMarker,MyMarker> input_xyz,double over_dist){
^
tip_main.cpp:32:10: 错误：'MyMarker over_traced_node(QPair, double)'已在此定义过
MyMarker over_traced_node(QPair< MyMarker,MyMarker> input_xyz,double over_dist){
^
tip_main.cpp: 在函数'MyMarker off_signal_node(QPair, int)'中:
tip_main.cpp:3748:10: 错误：'MyMarker off_signal_node(QPair, int)' 重定义
MyMarker off_signal_node(QPair< MyMarker,MyMarker> input_xyz,int over_dist){
^
tip_main.cpp:55:10: 错误：'MyMarker off_signal_node(QPair, int)'已在此定义过
MyMarker off_signal_node(QPair< MyMarker,MyMarker> input_xyz,int over_dist){
^
tip_main.cpp: 在函数'void get_undertraced_sample(const V3DPluginArgList&, V3DPluginArgList&, V3DPluginCallback2&)'中:
tip_main.cpp:3776:6: 错误：'void get_undertraced_sample(const V3DPluginArgList&, V3DPluginArgList&, V3DPluginCallback2&)' 重定义
void get_undertraced_sample(const V3DPluginArgList & input, V3DPluginArgList & output, V3DPluginCallback2 & callback)
^
tip_main.cpp:83:6: 错误：'void get_undertraced_sample(const V3DPluginArgList&, V3DPluginArgList&, V3DPluginCallback2&)'已在此定义过
void get_undertraced_sample(const V3DPluginArgList & input, V3DPluginArgList & output, V3DPluginCallback2 & callback)
^
tip_main.cpp: 在函数'void get_overtraced_sample(const V3DPluginArgList&, V3DPluginArgList&, V3DPluginCallback2&)'中:
tip_main.cpp:3885:6: 错误：'void get_overtraced_sample(const V3DPluginArgList&, V3DPluginArgList&, V3DPluginCallback2&)' 重定义
void get_overtraced_sample(const V3DPluginArgList & input, V3DPluginArgList & output, V3DPluginCallback2 & callback)
^
tip_main.cpp:192:6: 错误：'void get_overtraced_sample(const V3DPluginArgList&, V3DPluginArgList&, V3DPluginCallback2&)'已在此定义过
void get_overtraced_sample(const V3DPluginArgList & input, V3DPluginArgList & output, V3DPluginCallback2 & callback)

Hello!

Seemingly the problem was because of redefinition. Normally you can remove the definitions/ or change another name of the definition in tip_main.cpp file to solve this problem.

The plugin you compiled was in Vaa3D or you wrote?

Best Wishes.

Lingli