cpp_dbg_out

A dbg_out variadic macro that prints the function, file, line and the rest of the arguments from where it's called, to the standard output.

The developer can enable the debug messages by defining ENABLE_DBG_OUT, and change the call to a no-op by not defining ENABLE_DBG_OUT.

It is thread-safe to call this macro from multiple threads.

It works both in gcc and clang, and requires C++17.

Compile and run

cmake -S . -B build
cmake --build build
./build/main

So this call inside main(), in the main.cpp file at line 29

dbg_out("Hello", "World", 3);

Will print:

main main.cpp:29 Hello World 3

To disable the printing of the debug messages, just comment out the

#define ENABLE_DBG_OUT

The definition of ENABLE_DBG_OUT can also be done from the terminal, by adding the -DENABLE_DBG_OUT compilation option.