vscode c++ 编译生成后,调试时无法命中断点

 //test.cpp
 #include <stdio.h>
 int g_var = ;
 void print_line(char *str)
 {
     if (str != NULL)
         printf("%s\r\n", str);
     else
         printf("null string\r\n");
 }
 int main (int argc, char **argv)
 {
     int l_var = ;
     print_line("hello world!");
     printf("g_var = %d, l_var = %d.\r\n", g_var, l_var);
     return ;
 }

launch.json

 {
         "version": "0.2.0",
         "configurations": [
             {
                 "name": "(gdb) Launch",
                 "type": "cppdbg",
                 "request": "launch",
                 "program": "${workspaceRoot}/test.exe",
                 "args": [],
                 "stopAtEntry": false,
                 "cwd": "${workspaceRoot}",
                 "environment": [],
                 "externalConsole": true,
                 "MIMode": "gdb",
                 "miDebuggerPath": "C:\\MinGW\\bin\\gdb.exe",
                 "setupCommands": [
                     {
                         "description": "Enable pretty-printing for gdb",
                         "text": "-enable-pretty-printing",
                         "ignoreFailures": true
                     }
                 ]
             }
         ]
     }

tasks.json

 {
     // See https://go.microsoft.com/fwlink/?LinkId=733558
     // for the documentation about the tasks.json format
     "version": "2.0.0",
     "tasks": [
         {
             "taskName": "test",
             "type": "shell",
             "command": "g++",
             "args": ["-g", "${file}", "-o", "${workspaceRoot}/test.exe"]
         }
     ]
 }

编译成功后，在源码中设置断点，却无法命中断点。

后来查看官方c++编译调试文档和尝试，在launch.json文件的

"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]

后面加上

"preLaunchTask": "test" 配置，调试时就可以正常命中断点了。

注意：别忘了"setupCommands"的中括号’ ] ‘后面加上一个逗号。