http://d.puremagic.com/issues/show_bug.cgi?id=4686

           Summary: rdmd could use an incremental compilation option
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: cbkbbejeap@mailinator.com


--- Comment #0 from Nick Sabalausky <cbkbbejeap@mailinator.com> 2010-08-19 17:46:03 PDT ---
rdmd should have the ability (probably through a flag like "--incremental") to keep the generated object files and only recompile the modules that have been changed (or are dependent on a module that has been changed).

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Andrei Alexandrescu <andrei@metalanguage.com> changed:

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


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--- Comment #1 from Andrei Alexandrescu <andrei@erdani.com> 2013-02-26 09:11:01 PST ---
Isn't this already the case?

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Vladimir Panteleev <thecybershadow@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |thecybershadow@gmail.com


--- Comment #2 from Vladimir Panteleev <thecybershadow@gmail.com> 2013-02-26 19:14:10 EET ---
No. rdmd simply does not recompile if no source files changed, but if at least one changes, it rebuilds the whole program.

rdmd compiles all modules at once. There are known bugs in DMD that prevent incremental compilation while passing multiple files to DMD, so in order to support incremental compilation, rdmd would need to invoke the compiler once for every module. This would slow it down considerably in the general case.

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--- Comment #3 from Andrei Alexandrescu <andrei@erdani.com> 2013-02-26 09:50:43 PST ---
Got it. So let's keep this open, I foresee a solution in which rdmd would be able to decide which approach to take depending on various heuristics.

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Vladimir Panteleev <thecybershadow@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |DUPLICATE


--- Comment #4 from Vladimir Panteleev <thecybershadow@gmail.com> 2013-03-10 07:06:30 EET ---
Issue 9673 is Andrei's proposal to implement this.

Discussion: http://forum.dlang.org/post/khh27e$2kvb$1@digitalmars.com

*** This issue has been marked as a duplicate of issue 9673 ***

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