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| Running Orc ApplicationsRunning Orc Applications — How to run applications using ORC. | 
At runtime several environment variables can be used to control ORC.
ORC_DEBUG. 
    This environment variable can be set to a number indicating the level for
    debug logging. A value of 0 (default) results in no debug logging. The
    higher the value to more detail is logged.
  
ORC_CODE. 
    This variable can be set to a comma separated list of flags to control the
    code selection and execution. Supported values are: backup, emulate and
    debug. The value 'backup' would instruct ORC to select the C based backup
    functions. Selecting 'emulate' will run the ORC code through an interpreter.
    Using 'debug' enables debuggers such as gdb to create useful backtraces from
    ORC-generated code
  
ORC_TARGET. 
    This environment variable can be used to override the default target
    selection and force a specific target such as "sse" or "avx".
    This can be useful for benchmarking purposes, e.g. to compare SSE vs. AVX
    targets, or to work around bugs. Available since Orc 0.4.35.