Simple C++ logger uses singleton pattern to implement logging into a single file from any place in the code of your C++ code.

Use FetchContent:

include(FetchContent)
FetchContent_Declare(
  scl
  GIT_REPOSITORY https://github.com/AlbertRtk/simple_cpp_logger.git
  GIT_TAG        v.1.0.0 
)
FetchContent_MakeAvailable(scl)

add_executable(main src/main.cpp)
target_link_libraries(main PRIVATE scl)

Sample code:

#include "scl_logger.h"

int main(int argc, char *argv[]) {
    scl::Logger::GetLogger().Initialize("my_log_file.log");
    scl::Logger::GetLogger().MakeVerbose();
    LOG_INFO("Logger started...");
    LOG_DEBUG("Debug message.");
    LOG_WARNING("Warning message!");
    LOG_ERROR("ERROR MESSAGE!!!");
    return 0;
}

1. Initialize the logger. Initialize method takes path to an output log file as input:

   scl::Logger::GetLogger().Initialize("my_log_file.log");

2. Once initialize, you can make the logger verbose (outputs to a log file and stdout) or silent (outputs only to a log file):

   scl::Logger::GetLogger().MakeVerbose();
   scl::Logger::GetLogger().MakeSilent();

3. You can use predefined macros to to log messages of different level:

   LOG_INFO("Logger started...");
   LOG_DEBUG("Debug message.");  // logged only in debug builds
   LOG_WARNING("Warning message!");
   LOG_ERROR("ERROR MESSAGE!!!");