[MacPorts] #47127: cmake portgroup: use ninja and/or speed up destroot install?

[MacPorts]

#47127: cmake portgroup: use ninja and/or speed up destroot install?
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 Reporter:  rjvbertin@…  |      Owner:  macports-tickets@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:
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 Since we're discussion the cmake portgroup
 (https://trac.macports.org/ticket/33259) there some other enhancements
 that might be investigated.

 CMake can use a Ninja generator that create ninja.build files instead of
 Makefiles. Ninja is much more efficient than make, and using it should
 speed up even one-time builds from what I understand.

 Alternatively, the Makefiles created with the default generator have an
 install target that speeds up the installation considerably for larger
 projects: `install/fast`. My understanding is that it skips the entire
 verification of the build phases the install depends on, verification
 which is redundant in the MacPorts workflow. So instead of first going
 through the whole build sequence to verify if everything is indeed really
 built and up-to-date, it will start the install immediately.

 This may not be a break-through speed-up for regular users who still have
 to wait for a full build to complete (but then it should be perfectly
 equal to them too whether a build is done OOT or not ;)). For port
 maintainers this is different: I for one find myself repeating the
 destroot step quite often in order to get it exactly right, and I'd
 appreciate not having to wait for a superfluous check that has output
 flowing over my screen for sometimes long minutes.

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Ticket URL: <https://trac.macports.org/ticket/47127>
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