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The Simplified MakeMaker class hierarchy |
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**************************************** |
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|
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What most people need to know. |
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(Subclasses on top.) |
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|
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MY |
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| |
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ExtUtils::MakeMaker |
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ExtUtils::MM_{Current OS} |
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ExtUtils::MM_Unix |
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ExtUtils::MM_Any |
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The object actually used is of the class MY which allows you to |
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override bits of MakeMaker inside your Makefile.PL by declaring |
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MY::foo() methods. |
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|
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The Real MakeMaker class hierarchy |
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********************************** |
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|
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You wish it was that simple. |
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|
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Here's how it really works. |
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|
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PACK### (created each call to ExtUtils::MakeMaker->new) |
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. | |
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(mixin) | |
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. | |
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MY (created by ExtUtils::MY) | |
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ExtUtils::MY MM (created by ExtUtils::MM) |
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| | | |
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ExtUtils::MM ExtUtils::MM_{Current OS} |
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| | . |
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ExtUtils::Liblist ExtUtils::MakeMaker . |
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| |
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ExtUtils::Liblist::Kid . |
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(variable subclass) |
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|
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. |
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|
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ExtUtils::MM_{NonUnix}. . . . . . . . . . . . . . . . |
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| |
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ExtUtils::MM_Unix . . . . . . . . . . . . . . . . . . |
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| |
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ExtUtils::MM_Any |
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NOTE: Yes, this is a mess. See |
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http://archive.develooper.com/makemaker@perl.org/msg00134.html |
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for some history. |
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|
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NOTE: When ExtUtils::MM is loaded it chooses a superclass for MM from |
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amongst the ExtUtils::MM_* modules based on the current operating |
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system. |
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NOTE: ExtUtils::MM_{Current OS} represents one of the ExtUtils::MM_* |
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modules except ExtUtils::MM_Any. |
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NOTE: ExtUtils::MM_{NonUnix} represents all of the ExtUtils::MM_* |
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modules except ExtUtils::MM_Any and ExtUtils::MM_Unix. |
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NOTE: The main object used by MakeMaker is a PACK### object, *not* |
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ExtUtils::MakeMaker. It is, effectively, a subclass of MY, |
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ExtUtils::Makemaker, ExtUtils::Liblist and an ExtUtils::MM_* class |
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appropriate for your operating system. |
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|
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NOTE: The methods in MY are simply copied into PACK### rather than |
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MY being a superclass of PACK###. I don't remember the rationale. |
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|
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NOTE: ExtUtils::Liblist should be removed from the inheritence hiearchy |
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and simply be called as functions. |
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NOTE: Modules like File::Spec and Exporter have been omitted for clarity. |
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|
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The MM_* hierarchy |
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****************** |
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|
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MM_Win95 MM_NW5 |
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\ / |
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MM_BeOS MM_Cygwin MM_OS2 MM_VMS MM_Win32 MM_DOS MM_MacOS MM_UWIN |
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\ | | | / / / / |
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--------------------------------------------------------- |
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MM_Unix | |
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MM_Any |
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NOTE: Each direct MM_Unix subclass is also an MM_Any subclass. This |
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is a temporary hack because MM_Unix overrides some MM_Any methods with |
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Unix specific code. It allows the non-Unix modules to see the |
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original MM_Any implementations. |
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|
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NOTE: Modules like File::Spec and Exporter have been omitted for clarity. |
