http://d.puremagic.com/issues/show_bug.cgi?id=768

           Summary: A switch to print predefined version identifiers
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: DMD
        AssignedTo: bugzilla@digitalmars.com
        ReportedBy: larsivar@igesund.net


Tools working with D code, and build tools in particular, need to know which version identifiers are set by the compiler. To make this exact and less error prone (a tool can't check which identifiers are set without knowing their names), a standard switch should be added to all D compilers (I have picked DMD here as this would presumably be a frontend feature.)

The switch ( -versionids or similar) should print the set identifiers to stdout in an easily parseable format. The set printed by the compiler may change depending on environment or additional switches, for instance would GDC presumably print varying identifiers if cross compiling targets are specified.


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http://d.puremagic.com/issues/show_bug.cgi?id=768





------- Comment #1 from thomas-dloop@kuehne.cn  2006-12-29 18:20 -------
While the commandline switch is useful, a more integrated solution would be much more powerful:

const char[][] all_defined_versions = version[];

That way debugging complex version setups becomes very easy.


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http://d.puremagic.com/issues/show_bug.cgi?id=768





------- Comment #2 from larsivar@igesund.net  2006-12-30 04:14 -------
(In reply to comment #1)
> While the commandline switch is useful, a more integrated solution would be much more powerful:
> 
> const char[][] all_defined_versions = version[];
> 
> That way debugging complex version setups becomes very easy.
> 

I don't think this could easily be made to handle cross compilation?


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http://d.puremagic.com/issues/show_bug.cgi?id=768





------- Comment #3 from thomas-dloop@kuehne.cn  2006-12-30 07:49 -------
What would be the potential issues with cross compilation?


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http://d.puremagic.com/issues/show_bug.cgi?id=768





------- Comment #4 from larsivar@igesund.net  2006-12-30 07:52 -------
(In reply to comment #3)
> What would be the potential issues with cross compilation?
> 

I may misunderstand your suggestion, but how would I (runtime) go about finding which version ids will be set given a specific target architecture/platform?


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http://d.puremagic.com/issues/show_bug.cgi?id=768





------- Comment #5 from thomas-dloop@kuehne.cn  2006-12-30 20:09 -------
(In reply to comment #4)
The version ids set for cross compilation could be printed via a compile time
template.

(Issues #772 , #774 and #775 are currently blocking this kind of template.)


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http://d.puremagic.com/issues/show_bug.cgi?id=768


Andrei Alexandrescu <andrei@metalanguage.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |andrei@metalanguage.com
         AssignedTo|nobody@puremagic.com        |bugzilla@digitalmars.com


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