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 <para>

 Configuring the right options to build programs to work with the
 libraries--especially shared libraries--installed on a POSIX system
 can be very complicated.
 Various utilies with names that end in <filename>config</filename>
 can return command-line options for the
 GNU Compiler Collection

 </para>

 <para>

 &SCons; construction environments have a &ParseConfig; method
 that executes a utility and configures
 the appropriate construction variables
 in the environment
 based on the command-line options
 returned by the specified command.

 </para>

 </para>

 <programlisting>
    env = Environment()
    env.ParseConfig("pkg-config")
 </programlisting>

 <para>

 &SCons; will execute the specified command string
 and XXX

 </para>

 <screen>
    % <userinput>scons -Q</userinput>
    scons: `.' is up to date.
    Must specify package names on the command line
 </screen>

 <para>

 XXX

 </para>