Fixed macdeployqt tool for Qt 6.2

Ths repository contains a fork of the macdeployqt utility, which can be used to copy required Qt libraries and plug-ins into applications bundles and then codesign the whole bundle for notarization.

The codesign feature is a recent addition to the tool, and doesn't work properly since it only signs binaries like shared libraries, framework libraries and executables, but not the enclosing bundles (e.g. the .app or .framework directories). This will lead to codesign complaining about the Qt frameworks being "not signed at all" and refusing to sign the app bundle executable(s).

This repository contains a brute-force fix for this issue. For every binary signed, the tool now traverses the path of that binary and looks for any directory names ending with .framework. If one is found, it is also signed. For frameworks containing multiple binaries, this can result in some codesign invocations to fail, but the last try should succeed (since all binaries inside are signed then).

In addition to signing frameworks, the enclosing application bundle is now also signed. Note this is done with the same settings as all files inside the bundle, so if you need additional parameters, e.g. for specific entitlements, the bundle needs to be properly signed again after running macdeployqt.

Building macdeployqt

The repository is organized to build a standalone executable, which, after installation, is set tup with an RPATH in a way that it can replace the original tool in a Qt build.

Requirements

The code was taken from the Qt 6.2 LTS version, so it is recommended to build it against this version. It should run with future versions as well though. Other than that, the build requirements are basically the same as for building Qt 6.2 on macOS.

It is recommended to use the Ninja build generator, as this is Qt's preferred build tool. It should build with the Unix Makefiles or Xcode generators as well.

Running the build

Configure the build using cmake, then build and install the executable:

cmake -GNinja \
    -S /path/to/macdeployqt-sources \
    -B /path/to/build-dir
    -DCMAKE_INSTALL_PREFIX=/path/to/install-dir
    -DCMAKE_BUILD_TYPE=Release
cmake --build /path/to/build-dir --target install

After running the above commands, you should have a macdeployqt executable in the install dir. Copy it to your Qt installation's bin dir and replace the original executable located there.

Providing a different RPATH

If you don't want to replace the original executable or use the program from a different location, set the MACDEPLOQT_RPATH variable to the required value, e.g. via -DMACDEPLOQT_RPATH=/some/other/path in the initial cmake configure command.

By default, it is set to @executable_path/../lib.