[MacPorts] #72593: opencv4 @4.5.0: error: no viable overloaded '=' (was: opencv4 fails to build on OS X 10.6.8)
MacPorts
noreply at macports.org
Tue Jun 10 09:30:31 UTC 2025
#72593: opencv4 @4.5.0: error: no viable overloaded '='
-------------------------+-------------------------
Reporter: NucleaPeon | Owner: mascguy
Type: defect | Status: assigned
Priority: Normal | Milestone:
Component: ports | Version: 2.10.7
Resolution: | Keywords: snowleopard
Port: opencv4 |
-------------------------+-------------------------
Changes (by ryandesign):
* status: new => assigned
* keywords: opencv, build => snowleopard
* owner: (none) => mascguy
Comment:
The log says the reason for the failure was:
{{{
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_opencv4/opencv4/work/opencv4-4.5.0/modules/highgui/src/window_cocoa.mm:249:65:
warning: instance method '-convertSizeFromBacking:' not found (return type
defaults to 'id') [-Wobjc-method-access]
scaledImageSize = [[window contentView]
convertSizeFromBacking:imageSize];
^~~~~~~~~~~~~~~~~~~~~~
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_opencv4/opencv4/work/opencv4-4.5.0/modules/highgui/src/window_cocoa.mm:85:12:
note: receiver is instance of class declared here
@interface CVView : NSView
^
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_opencv4/opencv4/work/opencv4-4.5.0/modules/highgui/src/window_cocoa.mm:249:41:
error: no viable overloaded '='
scaledImageSize = [[window contentView]
convertSizeFromBacking:imageSize];
~~~~~~~~~~~~~~~ ^
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGGeometry.h:21:8:
note: candidate function (the implicit copy assignment operator) not
viable: no known conversion from 'id' to 'const CGSize' for 1st argument
struct CGSize {
^
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGGeometry.h:21:8:
note: candidate function (the implicit move assignment operator) not
viable: no known conversion from 'id' to 'CGSize' for 1st argument
1 warning and 1 error generated.
make[2]: ***
[modules/highgui/CMakeFiles/opencv_highgui.dir/src/window_cocoa.mm.o]
Error 1
make[2]: Leaving directory
`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_opencv4/opencv4/work/build'
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
}}}
(Followed by many more errors.) We see the same on our 10.6 build machine:
https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/238774
--
Ticket URL: <https://trac.macports.org/ticket/72593#comment:2>
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