(ddd.info)Customizing Diagnostics

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B.5.3 Customizing Diagnostics
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You can use these additional resources to obtain diagnostics about DDD.
Most of them are tied to a particular invocation option.

 -- Resource: appDefaultsVersion (class Version)
     The version of the DDD app-defaults file.  If this string does not
     match the version of the current DDD executable, DDD issues a
     warning.

 -- Resource: checkConfiguration (class CheckConfiguration)
     If `on', check the DDD environment (in particular, the X
     configuration), report any possible problem causes and exit.
     Note: Options, for the `--check-configuration' option.

 -- Resource: dddinitVersion (class Version)
     The version of the DDD executable that last wrote the
     `~/.ddd/init' file.  If this string does not match the version of
     the current DDD executable, DDD issues a warning.

 -- Resource: debugCoreDumps (class DebugCoreDumps)
     If `on', DDD invokes a debugger on itself when receiving a fatal
     signal.  Note: Maintenance Menu, for setting this resource.

 -- Resource: dumpCore (class DumpCore)
     If `on' (default), DDD dumps core when receiving a fatal signal.
     Note: Maintenance Menu, for setting this resource.

 -- Resource: maintenance (class Maintenance)
     If `on', enables the top-level `Maintenance' menu (Note:
     Maintenance Menu) with additional options.  Note: Options, for
     the `--maintenance' option.

 -- Resource: showConfiguration (class ShowConfiguration)
     If `on', show the DDD configuration on standard output and exit.
     Note: Options, for the `--configuration' option.

 -- Resource: showFonts (class ShowFonts)
     If `on', show the DDD font definitions on standard output and
     exit.  Note: Options, for the `--fonts' option.

 -- Resource: showInvocation (class ShowInvocation)
     If `on', show the DDD invocation options on standard output and
     exit.  Note: Options, for the `--help' option.

 -- Resource: showLicense (class ShowLicense)
     If `on', show the DDD license on standard output and exit.  Note:
     Options, for the `--license' option.

 -- Resource: showManual (class ShowManual)
     If `on', show this DDD manual page on standard output and exit.
     If the standard output is a terminal, the manual page is shown in a
     pager (`$PAGER', `less' or `more').  Note: Options, for the
     `--manual' option.  

 -- Resource: showNews (class ShowNews)
     If `on', show the DDD news on standard output and exit.  Note:
     Options, for the `--news' option.

 -- Resource: showVersion (class ShowVersion)
     If `on', show the DDD version on standard output and exit.  Note:
     Options, for the `--version' option.

 -- Resource: suppressWarnings (class SuppressWarnings)
     If `on', X warnings are suppressed.  This is sometimes useful for
     executables that were built on a machine with a different X or
     M*tif configuration.  By default, this is `off'.  Note: X
     Warnings, for details.

 -- Resource: trace (class Trace)
     If `on', show the dialog between DDD and the inferior debugger on
     standard output.  Default is `off'.  Note: Options, for the
     `--trace' option.