Review Request 125614: Enable normal rpath handling on Mac

[René J.V. Bertin]

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There is an issue with Qt 5.5.0's configure script, currently. From what I understand, the `-rpath` configure option works as intended, and gives relocatable framework bundles that are intended to be embedded in dependent app bundles.
Qt installs for a fixed, shared location should use `-no-rpath`, but the Qt5 build system currently doesn't add the `absolute_library_soname` option to the qmake config (see my "Qt 5.5.0 build issues on OS X : rpath" thread on Qt's development ML). The Qt 5.4.2 script did this correctly; I provide a patch that restores this with my `qt5-kde` port for MacPorts (https://github.com/RJVB/macstrop/blob/master/aqua/qt5-kde/files/patch-configure-find-opengl-and-correct-rpath.diff).

(The absolute_library_soname config stores the full install name in the generated frameworks, without explicit use of `install_name_tool`).

- René J.V. Bertin


On Oct. 12, 2015, 8:46 p.m., Christoph Cullmann wrote:
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/125614/
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> 
> (Updated Oct. 12, 2015, 8:46 p.m.)
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> Review request for KDE Software on Mac OS X, KDE Frameworks, Alex Merry, and Harald Fernengel.
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> Repository: extra-cmake-modules
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> Description
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> Enable normal rpath handling on Mac, just in addition set the install name.
> Without this, with a plain qt installed via the qt mac installer, no program build runs, e.g. desktoptojson can't locate any Qt lib.
> With that all is fine and we have some reasonable rpaths:
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> Load command 17
>           cmd LC_RPATH
>       cmdsize 48
>          path /Users/cullmann/local/kf5/usr/lib (offset 12)
> Load command 18
>           cmd LC_RPATH
>       cmdsize 56
>          path /Users/cullmann/Qt5.5.0/5.5/clang_64/lib (offset 12)
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> Diffs
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>   kde-modules/KDECMakeSettings.cmake cefd6da 
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> Diff: https://git.reviewboard.kde.org/r/125614/diff/
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> Testing
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> Could build kservice with this patch again, as desktoptojson works.
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> 
> Thanks,
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> Christoph Cullmann
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>

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