6.7.3.1 Customizing spld

The spld tool reads a configuration file at start-up that contains default values for many configurable parameters. It is sometimes useful to modify these in order to adapt to local variations.

The following methods can be used also with the splfr command, The Foreign Resource Linker.

There are two methods

• Override some parameters with --conf VAR=VALUE.

  This is useful when only a few parameters need to be changed, e.g. the C compiler. You can override multiple parameters by specified --conf more than once.

  For instance, to use a non-default C compiler you can pass --conf CC=/home/joe/bin/mycc.

  The option --conf was introduced in SICStus Prolog 4.0.3.

• Use a modified configuration file with --config=File.

  It may sometimes be convenient to use a separate, possibly modified, configuration file. This should seldom be needed, use --conf instead.

  To use a modified configuration file, follow these instructions:

  1. Locate the configuration file spconfig-version. It should be located in the same directory as spld.
  2. Make a copy for spconfig-version; let's call it hacked_spld.config. Do not edit the original file.
  3. The configuration file contains lines on the form CFLAGS=-g -O2. Edit these according to your needs. Do not add or remove any options.
  4. You may now use the modified spconfig-version together with spld like this:

                    % spld [...] --config=/path/to/hacked_spld.config
     

  5. Replace /path/to with the actual path to the hacked configuration file.