CODEWITHSUNDEEP
c++qtcmakeqt6
Dugongue
Dugongue

Reputation: 101

Cannot find Qt6 installation?

Trying to follow the install instructions from a GitHub page: https://github.com/TASEmulators/fceux

I went through with installing Qt6 and when I do the following this happens:

mkdir build
cd build
cmake  -DCMAKE_INSTALL_PREFIX=/usr  -DQT6=1  -DCMAKE_BUILD_TYPE=Debug    ..

-- Selecting Windows SDK version 10.0.19041.0 to target Windows 10.0.19042.
-- GUI Frontend: Qt6
CMake Error at src/CMakeLists.txt:22 (find_package):
  By not providing "FindQt6.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Qt6", but
  CMake did not find one.

  Could not find a package configuration file provided by "Qt6" with any of
  the following names:

    Qt6Config.cmake
    qt6-config.cmake

  Add the installation prefix of "Qt6" to CMAKE_PREFIX_PATH or set "Qt6_DIR"
  to a directory containing one of the above files.  If "Qt6" provides a
  separate development package or SDK, be sure it has been installed.


-- Configuring incomplete, errors occurred!

Upvotes: 8

Views: 25428

Answers (3)

sora kasukano
sora kasukano

Reputation: 1

try adding this to the top of CMakeLists.txt

set(Qt6_DIR F:/Qt6.7/6.7.2/mingw_64/lib/cmake/Qt6/)

Replace the value with your path. Qt6Config.cmake or qt6-config.cmake be under the path.

Upvotes: 0

Jan Chan
Jan Chan

Reputation: 76

You can try to define the directory contains the installation of Qt6. Suppose Qt is installed in /home/user/Qt6

cmake -DCMAKE_PREFIX_PATH="/home/user/Qt6/6.4.2/gcc_64/lib/cmake" .

Upvotes: 5

user3328152
user3328152

Reputation: 115

As the error message says, you need up set the environment value Qt6_DIR to the location you installed qt6 to. This should be a part of the instructions in installing qt6.

You should link the instructions you used for installing qt6. They may contain instructions to set the environment variable QT_DIR instead of the Qt6_DIR which is required by what you're building. If this is the case just follow the instructions for setting QT_DIR to also set Qt6_DIR.

Upvotes: 1

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