building klayout on macOS Tahoe M1 with qt5 (framework 'AGL' not found)

[stefanottili]

Since OpenROAD is still using qt5, I also build klayout with homebrew qt5 on a MacBook M1.

After switching to MacOS Tahoe this stopped working, the build fails with ld: framework 'AGL' not found.
klayout builds without issues using the default qt (6.9.2).
Unfortunately the OpenROAD build system doesn't like it when both qt5 and qt6 are installed.

The workaround to build using qt@5 is to remove all mention of AGL from /opt/homebrew/opt/qt@5/mkspecs/modules/qt_lib_gui_private.pri.

build4mac.py -r HB34 -p HBAuto -q Qt5Brew -m '--jobs=8' -n -u then succeeds in building klayout.

[maliberty]

I'm curious if building with bazel works on a mac. It is more hermetic and should care less.

[stefanottili]

Given the ongoing changes related to bazel builds, I didn’t dare to give it a try on Mac with homebrew yet.

[stefanottili]

Is there a chance to get OpenROAD to build using qt6 and tcl-tk 9 anytime soon ?

[maliberty]

We are using qt6 in bazel. The main hold up was getting Google to migrate. We should be able to update Qt in cmake too but I wasn't bothering as we are planning to move to bazel. tcl9 isn't high on my list but eventually.