Log and Debug Output

Introduction

For application output we use spdlog which is already integrated in OGS. Spdlog provides several verbosity levels which can be used with simple calls:

ERR("An error message!");
WARN("A warning message.");
INFO("An information message...");
DBUG("A debug message.");

As arguments you can use the same functionality as in fmt—a modern formatting library:

int foo = 42;
double boo = 3.14;
WARN("Foo is {}! Current value is {:10.2g}.", foo, boo);

For more information see the spdlog wiki.

On release builds the default log level is INFO, for debug builds it is DEBUG. The log level can be adjusted on the command line with -l <LOG_LEVEL> flag.


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