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4. Setting runtest defaults

The site configuration file, ‘site.exp’, captures configuration-dependent values and propagates them to the DejaGnu test environment using Tcl variables. This ties the DejaGnu test scripts into the configure and make programs.

DejaGnu supports more than one ‘site.exp’ file. The multiple instances of ‘site.exp’ are loaded in a fixed order built into DejaGnu (the more local last). The first file loaded is the optional ~/.dejagnurc, then the local files, and finally the global file.

  1. There is am optional “master” ‘site.exp’, capturing configuration values that apply to DejaGnu across the board, in each configuration-specific subdirectory of the DejaGnu library directory. runtest loads these values first. See section Configuring and Installing DejaGnu. The master ‘site.exp’ contains the default values for all targets and hosts supported by DejaGnu. This master file is identified by setting the environment variable DEJAGNU to the name of the file. This is also refered to as the “global” config file.
  2. Any directory containing a configured test suite also has a ‘site.exp’, capturing configuration values specific to the tool under test. Since runtest loads these values last, the individual test configuration can either rely on and use, or override, any of the global values from the “master” ‘site.exp’.

    You can usually generate or update the testsuite ‘site.exp’ by typing ‘make site.exp’ in the test suite directory, after the test suite is configured.

  3. You can also have a file in your home directory called .dejagnurc. This gets loaded first before the other config files. Usually this is used for personal stuff, like setting all_flag so all the output gets printed, or verbosity levels.

You can further override the default values in a user-editable section of any ‘site.exp’, or by setting variables on the runtest command line.


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