求助：Win10 64位下CMake配置Qt5.10与OpenCV3.4.1失败

Hey there, let's work through this issue together. The missing bin folder after configuring OpenCV 3.4.1 with Qt 5.10 is usually tied to misconfigured CMake settings or incomplete build steps. Here are the most likely fixes:

1. Verify CMake Configuration Options #

• Check Compiler Match: Ensure you're using a compiler compatible with Qt 5.10 — Qt 5.10 works best with MSVC 2015 64-bit (not MinGW, unless you've specifically built Qt with MinGW). When running CMake, make sure you select the correct x64 compiler variant (e.g., "Visual Studio 14 2015 Win64").
• Enable Build Targets: Double-check that you've enabled key build flags like BUILD_opencv_world (bundles most OpenCV modules into a single DLL) or individual module build options. If you leave all module options unchecked, CMake won't generate the dynamic libraries that end up in the bin folder.
• Confirm Install Path: Verify the CMAKE_INSTALL_PREFIX setting in CMake — this is where the final bin, lib, and include folders will be placed. If you didn't set this explicitly, the files might be in a subfolder of your build directory instead of the root opencv-build folder.

2. Ensure You Run the INSTALL Build Target #

Generating the project with CMake isn't enough — you need to explicitly build the INSTALL target to copy compiled files into the final directory:

• If using Visual Studio: Open the generated .sln file, find the INSTALL target in the Solution Explorer (under "CMakeTargets"), right-click it, and select "Build". This will populate the bin folder with DLLs and executables.
• If using MinGW: After running cmake .. to generate makefiles, execute mingw32-make install (not just mingw32-make). The install command is what moves the compiled binaries into the specified install directory.

3. Check for 32/64 Bit Mismatches #

Make sure every component is 64-bit:

• Your Qt 5.10 installation is 64-bit.
• The OpenCV source or pre-built files you're using are 64-bit.
• CMake is configured to build for x64 (not Win32). Mismatched architectures can cause incomplete builds or missing output folders.

4. Clear CMake Cache and Reconfigure #

If you've tried multiple times, old cache settings might be causing conflicts:

• Delete all files and folders inside your opencv-build directory.
• Re-run CMake from scratch, carefully selecting each option (compiler, install path, build modules) to ensure no mistakes are carried over.

内容的提问来源于stack exchange，提问作者Ahmad Almunajed