[MacPorts] #19781: modify cmake Modules for MacPorts prefix

[MacPorts]

#19781: modify cmake Modules for MacPorts prefix
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 Reporter:  dweber@…                     |       Owner:  css@…           
     Type:  enhancement                  |      Status:  assigned        
 Priority:  Normal                       |   Milestone:                  
Component:  ports                        |     Version:  1.7.1           
 Keywords:  FindITK.cmake cmake modules  |        Port:  cmake           
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Comment(by css@…):

 According to [http://public.kitware.com/Bug/view.php?id=4950 this CMake
 bug], the modules should include /opt/local already.  Maybe we should
 report upstream which modules ''don't include'' the MacPorts path? Maybe
 check for files containing /usr/local/ that don't include /opt/local? Each
 file we change places the onus of support on MacPorts.

 > The goal is to allow any MacPort installation to rely on cmake modules
 to pick up other MacPort libraries automatically, and in preference (with
 precedence) to anything similar installed outside of ${prefix} on the
 system.

 I hope to avoid the need to track down future bugs in the MacPorts-
 installed CMake modules, as CMake includes documented
 [http://www.cmake.org/cmake/help/cmake2.6docs.html#command:find_path ways
 to set additional paths]. If you set a `$CMAKE_PREFIX_PATH` environment
 variable to `/opt/local`, does that work without the need to create so
 many modifications?

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Ticket URL: <http://trac.macports.org/ticket/19781#comment:9>
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