Pass CTRL+C to Cmake custom command under VSCode - visual-studio-code

Question

I have a Cmake custom target that runs a command-line tool which has to be stopped using CTRL+C. If I run the tool from the terminal, it stops on CTRL+C just fine, but if I build my custom Cmake target, it's impossible to terminate it. I tried to add the USES_TERMINAL option to the Cmake target, but that doesn't change anything. Is there a Cmake or VSCode option that I have missed which would allow me to send SIGINT to a Cmake command?
Here's a small project to reproduce the situation:
CMakeLists.txt:
cmake_minimum_required(VERSION 3.2.0)
project(test_prj LANGUAGES CXX C)
set(CMAKE_VERBOSE_MAKEFILE ON CACHE BOOL "ON")
add_executable(test_prj main.c)
add_custom_target(test_run COMMAND test_prj USES_TERMINAL)
main.c:
#include <signal.h>
#include <stdio.h>
char flag = 1;
void sig_handler(int signum) {
flag = 0;
}
int main(void) {
signal(SIGINT, sig_handler);
while(flag);
printf("success\n");
return 0;
}
Once test_prj is compiled, running it in the terminal
PS C:\22_Test\build> ./test_prj.exe
<I hit CTRL-C here>
success
However, building test_run results in the following output:
[main] Building folder: 22_Test test_run
[build] Starting build
[proc] Executing command: C:\tools\cmake\3.20.2\bin\cmake.EXE --build c:/22_Test/build --config Debug --target test_run --
[build] [1/3 33% :: 0.108] Building C object CMakeFiles/test_prj.dir/main.c.obj
[build] [2/3 66% :: 0.345] Linking C executable test_prj.exe
[build] [3/3 66% :: 0.345] cmd.exe /C "cd /D C:\22_Test\build && C:\22_Test\build\test_prj.exe"
<I hit CTRL-C here, nothing happens>