How to compile cpp and c files together in VS Code - c++

Question

I have a number of question for VS Code Settings
i am trying out to build a test.cpp file with cJSON.c and cJSON.h (from cJSON library) included in it. The code as below
#include <iostream>
#include <sstream>
#include "cJSON.h"
int main()
{
std::cout << "ello world" <<std::endl;
cJSON *fmt = NULL;
cJSON* root = cJSON_CreateObject();
cJSON_AddItemToObject(root, "name", cJSON_CreateString("Jack (\"Bee\") Nimble"));
cJSON_AddItemToObject(root, "format", fmt = cJSON_CreateObject());
cJSON_AddStringToObject(fmt, "type", "rect");
cJSON_AddNumberToObject(fmt, "width", 1920);
cJSON_AddNumberToObject(fmt, "height", 1080);
cJSON_AddFalseToObject (fmt, "interlace");
cJSON_AddNumberToObject(fmt, "frame rate", 24);
char *tmp_json = cJSON_Print(root);
std::stringstream myStreamString;
myStreamString << tmp_json;
std::string myString = myStreamString.str();
std::cout << " json string is " << myString << std::endl;
cJSON_Delete(root);
free(tmp_json );
return 0;
}
First, I have an error whenever I tried to rebuild test.cpp (ie I have successfully build it one time round)
Starting build...
/usr/bin/g++ -fdiagnostics-color=always -g /home/xx/test/* -o /home/xx/test/test
g++: fatal error: input file ‘/home/xx/test/test’ is the same as output file
compilation terminated.
I can solve only the problem by deleting the previous build or test and then rebuild
c_cpp_properties.json
{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/**"
],
"defines": [],
"compilerPath": "/usr/bin/gcc",
"cStandard": "gnu17",
"cppStandard": "gnu++14",
"intelliSenseMode": "linux-gcc-x64"
}
],
"version": 4
}
task.json
{
"tasks": [
{
"type": "cppbuild",
"label": "C/C++: g++ build active file",
"command": "/usr/bin/g++",
"args": [
"-fdiagnostics-color=always",
"-g",
"${workspaceFolder}/*",
"-o",
"${fileDirname}/${fileBasenameNoExtension}"
],
"options": {
"cwd": "${fileDirname}"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "build",
"isDefault": true
},
"detail": "Task generated by Debugger."
}
],
"version": "2.0.0"
}
Wonder did I fail to set anything extra in the settings? Is this the way on how mixed c++/c development should be compiled?
Thanks
Regards

Answer 1

Using such an input "${workspaceFolder}/*" causes inclusion of the previously built program test to the compiler arguments.
Use two globs:
"args": [
"-fdiagnostics-color=always",
"-g",
"${workspaceFolder}/*.c",
"${workspaceFolder}/*.cpp",
"-o",
"${fileDirname}/${fileBasenameNoExtension}"
]