opencv: error: dispatch/dispatch.h: No such file or directory

[amontinari@…]

Not sure why, but I cannot import the opencv libraries. What do I need to do to complete the installation correctly?
I am running a MACOSX 10.5.8 with XCode 3.1.4 and python 2.7
Here is the full log:

[amontinari@…]

Cc Me!

[ryandesign (Ryan Carsten Schmidt)]

Please use WikiFormatting and preview before submitting. Attach voluminous output instead of pasting it. Put the port name in the Port field, not the Keywords field. You do not need to Cc yourself when you are the reporter. This is a bug report, not a port request.

The relevant error seems to be:

:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_opencv/opencv/work/OpenCV-2.4.4/modules/core/src/parallel.cpp:106:39: error: dispatch/dispatch.h: No such file or directory

[cooljeanius (Eric Gallager)]

Replying to ryandesign@…:

The relevant error seems to be:

:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_opencv/opencv/work/OpenCV-2.4.4/modules/core/src/parallel.cpp:106:39: error: dispatch/dispatch.h: No such file or directory

That makes sense, considering that dispatch/dispatch.h is part of Grand Central Dispatch, which was introduced in 10.6, and apparently OP is only 10.5. I can think of two solutions: either prevent OpenCV from building on 10.5, or create a port for libdispatch that runs on 10.5. I actually already know of an implementation of libdispatch that runs on 10.5: ​http://daagaak.github.com/WiganWallgate/

[larryv (Lawrence Velázquez)]

Replying to egall@…:

That makes sense, considering that dispatch/dispatch.h is part of Grand Central Dispatch, which was introduced in 10.6, and apparently OP is only 10.5. I can think of two solutions: either prevent OpenCV from building on 10.5, or create a port for libdispatch that runs on 10.5. I actually already know of an implementation of libdispatch that runs on 10.5: ​http://daagaak.github.com/WiganWallgate/

Or patch it so it doesn’t try to use GCD.

[cooljeanius (Eric Gallager)]

Replying to larryv@…:

Replying to egall@…:

That makes sense, considering that dispatch/dispatch.h is part of Grand Central Dispatch, which was introduced in 10.6, and apparently OP is only 10.5. I can think of two solutions: either prevent OpenCV from building on 10.5, or create a port for libdispatch that runs on 10.5. I actually already know of an implementation of libdispatch that runs on 10.5: ​http://daagaak.github.com/WiganWallgate/

Or patch it so it doesn’t try to use GCD.

Or that, or add a configure check to test to see if GCD is available.

[jmroot (Joshua Root)]

Please remember to Cc the maintainer.

[stromnov (Andrey Stromnov)]

You can try this: ​https://github.com/stromnov/mports/commit/81d7f4b34087d19b949ff4d16bca7bb709a35661 (with GCD patch), or just rebuild with +tbb variant.

[cooljeanius (Eric Gallager)]

Replying to stromnov@…:

or just rebuild with +tbb variant.

Just a warning though, the +tbb variant doesn't work with +universal: #37320

[cooljeanius (Eric Gallager)]

The GCD patch got pushed in r104569

[cooljeanius (Eric Gallager)]

Cc Me!

[udbraumann]

Replying to egall@…:

The GCD patch got pushed in r104569

Now, 3 years later, this patch is no longer in the Portfile, and the problem reoccurs.

[udbraumann]

Cc Me!

[mascguy (Christopher Nielsen)]

Is there still a need to support MacOS 10.5?

[mascguy (Christopher Nielsen)]

This ticket is no longer relevant, as we don't have an OpenCV 2 port. Can someone close?