how_to_build_qt_creator_for_macos_arm64_a_guide/
https://www.cnblogs.com/wqcwood/p/15138983.html
Installing Clang for QDoc

Notice ！！ This only build Qt for arm64 version. Not universal. you can read this article for universal

1. Install Xcode

please google

2. Install Homebrew

please google

3. Install others need

• Get Qt build dependencies (using homebrew)

brew install pcre2 harfbuzz freetype

• Get Qt Creator dependencies (using homebrew)

brew install cmake ninja python
brew install --build-from-source llvm

4. Get Qt5.15.5 source code

• qt-everywhere-opensource-src-5.15.5.tar.xz
  unzip it !
  for me is : ~/Downloads/qt-everywhere-src-5.15.5

5. Install Clang for QDoc

• check llvm is install

llvm-config

• Find llvm install path

which llvm-config

out: /opt/homebrew/opt/llvm/bin/llvm-config

• Specify Clang location manually

$ export LLVM_INSTALL_DIR=/opt/homebrew/opt/llvm

6. Build Qt for mac (m1)

• open terminal and chang dir to ~/Downloads/qt-everywhere-src-5.15.5
  then

./configure -debug-and-release -prefix ./out QMAKE_APPLE_DEVICE_ARCHS=arm64 -skip qt3d -skip qtvirtualkeyboard

skip qt3d skip qtvirtualkeyboard because of build error! https://bugreports.qt.io/browse/QTBUG-98826

• If Error Message: You cannot configure qt separately within a top-level build
  Making two blank files named .qmake.stash and .qmake.super
  then go on configure. FUXXING QT!!!

touch .qmake.stash
touch .qmake.super

• Then choose open source, and choose yes.
  !!!Check QDoc is config yes to install.!!!
  then

make

• If error occurred!:
  
• !!! open qiosurfacegraphicsbuffer.h then include :

#include <CoreGraphics/CGColorSpace.h>
#include <IOSurface/IOSurface.h>

• like:
  
• Make again and make install

make 
make install

• If there are other errors, please follow the prompts and solve them one by one！！！
  if build success，you will find lib in path：

~/Downloads/qt-everywhere-src-5.15.5/out
check bin/qdoc has build succeeed. it will build qt doc for qt assistant

• make docs

make docs
make install_docs

• out->bin:
  

7. Install Qt creator use Homebrew

• Use homebrew （You can also use brew to install qt, but is newest. Not Qt5～）

brew install Qt Creator

8 Config Qt Creator

• You will found .qch will be auto detected.if not you can add by youself.
  
• Config Qt version

find you qmake path ,and set it

• config kits

• Open examples maybe get some trouble. x86_64 set in .pro

QMAKE_APPLE_DEVICE_ARCHS=arm64

Debug into Qt source see:

click me