[MacPorts] #32524: digikam: build error in imagehistorygraph_boost.h

[MacPorts]

#32524: digikam: build error in imagehistorygraph_boost.h
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 Reporter:  juer_gen01@…         |       Owner:  jan@…             
     Type:  defect               |      Status:  new               
 Priority:  Normal               |   Milestone:                    
Component:  ports                |     Version:  2.0.3             
 Keywords:                       |        Port:  digikam           
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Comment(by ryandesign@…):

 Attached is a patch to update digikam to 2.4.1. Unfortunately it fails
 with the same error. I'll leave this matter to the maintainer now.

 My patch simply removes the CMakeLists.txt patch that had allegedly dealt
 with not installing the docs unless the +docs variant was used. In fact,
 the list of files installed by digikam is identical whether or not the
 +docs variant is used so I hope it's safe to just remove this patch.

 In fact I see now that the code that was in the Portfile has a typo: it
 checks if `[variant_isset doc]` but the variant the portgroup adds is
 actually called "docs" not "doc". Perhaps this needs to be kept and the
 typo fixed.

 I verified that digikam 2.1.1 builds fine with boost 1.47.0. Perhaps 2.4.1
 would as well.

 The logs you attached show you forgot to download boost's patchfiles from
 the repository as well and put them in a "files" directory next to the
 Portfile.

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Ticket URL: <https://trac.macports.org/ticket/32524#comment:9>
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