Qt6 source code installation problem

1446311191

question:

Note: Hunspell in Qt Virtual Keyboard is not enabled. Spelling correction will not be available.

WARNING: QDoc will not be compiled, probably because libclang could not be located. This means that you cannot build the Qt documentation.
Either set CMAKE_PREFIX_PATH or LLVM_INSTALL_DIR to the location of your llvm installation.
On Linux systems, you may be able to install libclang by installing the libclang-dev or libclang-devel package, depending on your distribution.
On macOS, you can use Homebrew's llvm package.
You will also need to set the FEATURE_clang CMake variable to ON to re-evaluate this check.
WARNING: Clang-based lupdate parser will not be available. LLVM and Clang C++ libraries have not been found.
You will need to set the FEATURE_clangcpp CMake variable to ON to re-evaluate this check.
WARNING: QtWebEngine won't be built. node.js version 12 or later is required.
WARNING: QtPdf won't be built. node.js version 12 or later is required.

system environment

export CMAKE_PREFIX_PATH=/usr/local/bin/cmake
export LLVM_INSTALL_DIR=/usr/lib/llvm-12/

zhou@ubuntu:~/Downloads/qt-everywhere-src-6.4.2$ ls $LLVM_INSTALL_DIR/
bin  build  cmake  include  lib  share
zhou@ubuntu:~/Downloads/qt-everywhere-src-6.4.2$ ll $CMAKE_PREFIX_PATH
-rwxr-xr-x 1 root root 206 2月   6 10:10 /usr/local/bin/cmake*
zhou@ubuntu:~/Downloads/qt-everywhere-src-6.4.2$ ls $LLVM_INSTALL_DIR/bin/
bugpoint          llvm-addr2line      llvm-config   llvm-diff       llvm-extract            llvm-libtool-darwin  llvm-ml          llvm-pdbutil         llvm-readobj  llvm-strip       opt
count             llvm-ar             llvm-cov      llvm-dis        llvm-gsymutil           llvm-link            llvm-modextract  llvm-PerfectShuffle  llvm-reduce   llvm-symbolizer  sanstats
dsymutil          llvm-as             llvm-c-test   llvm-dlltool    llvm-ifs                llvm-lipo            llvm-mt          llvm-profdata        llvm-rtdyld   llvm-tblgen      split-file
FileCheck         llvm-bcanalyzer     llvm-cvtres   llvm-dwarfdump  llvm-install-name-tool  llvm-lto             llvm-nm          llvm-profgen         llvm-size     llvm-undname     verify-uselistorder
llc               llvm-bitcode-strip  llvm-cxxdump  llvm-dwp        llvm-jitlink            llvm-lto2            llvm-objcopy     llvm-ranlib          llvm-split    llvm-xray        yaml2obj
lli               llvm-cat            llvm-cxxfilt  llvm-elfabi     llvm-jitlink-executor   llvm-mc              llvm-objdump     llvm-rc              llvm-stress   not              yaml-bench
lli-child-target  llvm-cfi-verify     llvm-cxxmap   llvm-exegesis   llvm-lib                llvm-mca             llvm-opt-report  llvm-readelf         llvm-strings  obj2yaml

zhou@ubuntu:~/Downloads/qt-everywhere-src-6.4.2$ node -v
v18.14.0
zhou@ubuntu:~/Downloads/qt-everywhere-src-6.4.2$ npm version
{
  npm: '9.3.1',
  node: '18.14.0',
  v8: '10.2.154.23-node.22',
  uv: '1.44.2',
  zlib: '1.2.13',
  brotli: '1.0.9',
  ares: '1.18.1',
  modules: '108',
  nghttp2: '1.51.0',
  napi: '8',
  llhttp: '6.0.10',
  uvwasi: '0.0.14',
  acorn: '8.8.1',
  simdutf: '3.1.0',
  undici: '5.14.0',
  openssl: '3.0.7+quic',
  cldr: '42.0',
  icu: '72.1',
  tz: '2022g',
  unicode: '15.0',
  ngtcp2: '0.8.1',
  nghttp3: '0.7.0'
}
zhou@ubuntu:~/Downloads/qt-everywhere-src-6.4.2$ npx -v
9.3.1

How to solve the above warning content, please provide the following solution, thank you

1446311191

Why no one replied, Qt official efficiency is so low

jsulm

@1446311191 said in Qt6 source code installation problem:

Qt official efficiency is so low

This is user forum.
If you want to have fast and reliable support then you need to become commercial customer - QtCompany will then provide you support directly.

RkTest

@jsulm now understood why response is slow to various questions as it dependent on user volunteering to answer.