Cannot compile QtOpcUa

Mark81

I've just discovered they don't provide QtOpcUa from the Qt online installer.
So I'm trying to build it by myself against Qt 6.2.0.
The instructions I found are outdated so I'm guessing how to compile:

git clone https://code.qt.io/qt/qtopcua.git
cd qtopcua
git checkout 6.2.0
mkdir build && cd build
export Qt6_DIR=~/Qt/6.2.0/gcc_64/lib/cmake/Qt6/
~/Qt/Tools/CMake/bin/cmake  ..

But it reports a lot of errors:

CMake Warning:
  No source or binary directory provided.  Both will be assumed to be the
  same as the current working directory, but note that this warning will
  become a fatal error in future CMake releases.


-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE  
-- Performing Test HAVE_STDATOMIC
-- Performing Test HAVE_STDATOMIC - Success
-- Found WrapAtomic: TRUE  
-- Could NOT find Qt6CoreTools (missing: Qt6CoreTools_DIR)
CMake Warning at /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6/Qt6Config.cmake:176 (find_package):
  Found package configuration file:

    /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreConfig.cmake

  but it set Qt6Core_FOUND to FALSE so package "Qt6Core" is considered to be
  NOT FOUND.
Call Stack (most recent call first):
  CMakeLists.txt:20 (find_package)


-- Found OpenSSL: /usr/lib/x86_64-linux-gnu/libcrypto.so (found version "1.1.1f")  
-- Found WrapOpenSSLHeaders: /usr/include (found version "1.1.1f") 
-- Could NOT find Qt6CoreTools (missing: Qt6CoreTools_DIR)
CMake Warning at /home/user/Qt/Tools/CMake/share/cmake-3.21/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
  Found package configuration file:

    /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreConfig.cmake

  but it set Qt6Core_FOUND to FALSE so package "Qt6Core" is considered to be
  NOT FOUND.
Call Stack (most recent call first):
  /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:14 (find_dependency)
  /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6Network/Qt6NetworkDependencies.cmake:91 (_qt_internal_find_dependencies)
  /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6Network/Qt6NetworkConfig.cmake:40 (include)
  /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6/Qt6Config.cmake:176 (find_package)
  CMakeLists.txt:20 (find_package)


CMake Warning at /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6/Qt6Config.cmake:176 (find_package):
  Found package configuration file:

    /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6Network/Qt6NetworkConfig.cmake

  but it set Qt6Network_FOUND to FALSE so package "Qt6Network" is considered
  to be NOT FOUND.  Reason given by package:

  Qt6Network could not be found because dependency Qt6Core could not be
  found.

Call Stack (most recent call first):
  CMakeLists.txt:20 (find_package)


CMake Error at CMakeLists.txt:20 (find_package):
  Found package configuration file:

    /home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6/Qt6Config.cmake

  but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
  FOUND.  Reason given by package:

  Failed to find Qt component "Core".

  Expected Config file at
  "/home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreConfig.cmake"
  exists

  Failed to find Qt component "Network".

  Expected Config file at
  "/home/user/Qt/6.2.0/gcc_64/lib/cmake/Qt6Network/Qt6NetworkConfig.cmake"
  exists

by the way I don't understand a message like the last ones:

"Failed to find <something>. Expected file at <path> exists."

so if it exists why it cannot find it?
Any hint to build this module?

raven-worx

@Mark81 said in Cannot compile QtOpcUa:

The instructions I found are outdated so I'm guessing how to compile:
git clone https://code.qt.io/qt/qtopcua.git
cd qtopcua
git checkout 6.2.0
mkdir build && cd build
export Qt6_DIR=~/Qt/6.2.0/gcc_64/lib/cmake/Qt6/
~/Qt/Tools/CMake/bin/cmake ..

this is correct until the last 2 lines. Instead simply call:

/path/to/Qt/6.2.0/bin/qt-configure-module ..
cmake --build . --parallel
cmake --install .

also read
https://www.qt.io/blog/qt-6-build-system

Mark81

This post is deleted!

Mark81

@raven-worx thanks, I was able to compile! Out of curiosity, is there a script for Linux to export all the relevant environment variables like in Windows (the "Qt Console") ? I spent a couple of hours to figure out why it cannot find the tools (CMake and Ninja). Then I had to export their paths and finally it compiled.