# Is BUILD\_opencv\_world now automatically ON? **URL:** \ **Category:** Uncategorized\ **Tags:** build\ **Created:** [June 19, 2023, 8:26am UTC](https://forum.opencv.org/t/is-build-opencv-world-now-automatically-on/13590 "2023-06-19T08:26:48Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jiapei100](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/jiapei100/32/2661_2.png) [@jiapei100](https://forum.opencv.org/u/jiapei100)\ **Post date:** [June 19, 2023, 8:26am UTC](https://forum.opencv.org/t/is-build-opencv-world-now-automatically-on/13590/1 "2023-06-19T08:26:49Z")
Hi, all: I’m trying to build **OpenCV-4.7.0** now, but failed with the following **ERROR** messages, which seem to tell: **BUILD\_opencv\_world** is now **ON by default**. Actually, I remember I always tried to turn it **OFF** half a year ago while building **opencv** from source … Anyway, the **ERROR** s are as in the [pastebin](https://pastebin.com/EvxsiKph). And I searched **ALL** occurrences of **BUILD\_opencv\_world** : ```console ➜ opencv-4.7.0 grep -rwn "BUILD_opencv_world" build/CMakeCache.txt:2339:BUILD_opencv_world:INTERNAL=ON build/CMakeVars.txt:118:BUILD_opencv_world=ON CMakeLists.txt:605:if((INSTALL_CREATE_DISTRIB AND BUILD_SHARED_LIBS AND NOT DEFINED BUILD_opencv_world) OR APPLE_FRAMEWORK) CMakeLists.txt:606: set(BUILD_opencv_world ON CACHE INTERNAL "") modules/stitching/CMakeLists.txt:8:if(BUILD_SHARED_LIBS AND BUILD_opencv_world AND OPENCV_WORLD_EXCLUDE_EXTRA_MODULES) modules/imgcodecs/CMakeLists.txt:177:if(NOT BUILD_opencv_world) modules/python/CMakeLists.txt:10:elseif(BUILD_opencv_world OR (WIN32 AND CMAKE_BUILD_TYPE STREQUAL "Debug")) modules/highgui/CMakeLists.txt:314:if(NOT BUILD_opencv_world) modules/java/CMakeLists.txt:8: OR BUILD_opencv_world doc/tutorials/introduction/windows_install/windows_install.markdown:325: - *BUILD_opencv_world* -\> Generate a single "opencv_world" binary (a shared or static library, depending on *BUILD_SHARED_LIBS*) including all the modules instead of a collection of separate binaries, one binary per module. cmake/OpenCVUtils.cmake:260: if(BUILD_opencv_world) cmake/OpenCVUtils.cmake:1436: if(BUILD_opencv_world AND OPENCV_MODULE_${the_module}_IS_PART_OF_WORLD) cmake/OpenCVUtils.cmake:1500: if(BUILD_opencv_world) cmake/OpenCVModule.cmake:213: if(NOT OPENCV_MODULE_${the_module}_IS_PART_OF_WORLD OR NOT ${BUILD_opencv_world}) cmake/OpenCVModule.cmake:311: if(BUILD_opencv_world AND m STREQUAL "opencv_world" cmake/OpenCVModule.cmake:312: OR NOT BUILD_opencv_world cmake/OpenCVModule.cmake:489: if(BUILD_opencv_world) cmake/OpenCVModule.cmake:585: if(BUILD_opencv_world cmake/OpenCVModule.cmake:637: if(BUILD_opencv_world) cmake/OpenCVModule.cmake:878: if(BUILD_opencv_world AND OPENCV_MODULE_${the_module}_IS_PART_OF_WORLD) cmake/OpenCVModule.cmake:1204: if(NOT BUILD_opencv_world) cmake/OpenCVModule.cmake:1247: if(NOT BUILD_opencv_world) cmake/OpenCVModule.cmake:1299: if(NOT BUILD_opencv_world) cmake/OpenCVModule.cmake:1344: if(NOT BUILD_opencv_world) platforms/winpack_dldt/build_package.py:356: BUILD_opencv_world='OFF', ➜ opencv-4.7.0 ``` So, how can I successfully build **OpenCV-4.7.0**? Cheers ---
**Author:** ![cudawarped](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@cudawarped](https://forum.opencv.org/u/cudawarped)\ **Post date:** [June 19, 2023, 8:46am UTC](https://forum.opencv.org/t/is-build-opencv-world-now-automatically-on/13590/2 "2023-06-19T08:46:17Z")
> [@jiapei100](#): > > which seem to tell: **BUILD\_opencv\_world** is now **ON by default** Not for me, I just pulled from the tip of 4.x without setting > -DBUILD\_opencv\_world=ON with the following configuration output > – Disabled: world What are your arguments to CMake and your configuration output? Have you tried cleaning the build directory and starting from scratch? On a seperate but related note, I have never had any issues building the world module with CUDA if that is why you want to disable it? I think there used to be some issues but they must have been resolved for a long time. ---
**Author:** ![jiapei100](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/jiapei100/32/2661_2.png) [@jiapei100](https://forum.opencv.org/u/jiapei100)\ **Post date:** [June 19, 2023, 4:42pm UTC](https://forum.opencv.org/t/is-build-opencv-world-now-automatically-on/13590/3 "2023-06-19T16:42:36Z")
I found some tricky staff: It looks it has something to do with - WITH\_IPP - WITH\_ITT If I disable both (should be one of the above two), `BUILD_opencv_world` disappeared for me to turn **ON**. Currently, by default, `BUILD_opencv_world OFF` . Hmmmm… Can’t find any relationshp between `BUILD_opencv_world` and `WITH_IPP` or `WITH_ITT`. ---
**Author:** ![jiapei100](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/jiapei100/32/2661_2.png) [@jiapei100](https://forum.opencv.org/u/jiapei100)\ **Post date:** [June 20, 2023, 2:23am UTC](https://forum.opencv.org/t/is-build-opencv-world-now-automatically-on/13590/4 "2023-06-20T02:23:12Z")
Finally, successfully built **OpenCV-4.7.0** with ```console WITH_IPP ON WITH_ITT ON ``` Thank you man… ---
**Author:** ![cudawarped](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@cudawarped](https://forum.opencv.org/u/cudawarped)\ **Post date:** [June 20, 2023, 4:30am UTC](https://forum.opencv.org/t/is-build-opencv-world-now-automatically-on/13590/5 "2023-06-20T04:30:49Z")
Not sure how I helped but I’m glad you’ve got it working. I think you can close this issue > > > \### System Information > > \- OpenCV version: 4.7.0 > \- Operating System / Platform…: Ubuntu 22.04 > \- Compiler & compiler version: gcc (Ubuntu 11.3.0-1ubuntu1~22.04.1) 11.3.0 > \- Python version: Python 3.10.6 > > \### Detailed description > > Just trying to build OpenCV git of today: June 18, 2023. (4.7.0), but failed to configure: > > \`\`\`console > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2098 (cuda\_compile\_base) > cmake/OpenCVDetectCUDA.cmake:451 (CUDA\_COMPILE) > cmake/OpenCVUtils.cmake:1556 (ocv\_cuda\_compile) > cmake/OpenCVModule.cmake:989 (ocv\_add\_library) > cmake/OpenCVModule.cmake:905 (\_ocv\_create\_module) > modules/world/CMakeLists.txt:60 (ocv\_create\_module) > > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2098 (cuda\_compile\_base) > cmake/OpenCVDetectCUDA.cmake:451 (CUDA\_COMPILE) > cmake/OpenCVUtils.cmake:1556 (ocv\_cuda\_compile) > cmake/OpenCVModule.cmake:989 (ocv\_add\_library) > cmake/OpenCVModule.cmake:905 (\_ocv\_create\_module) > modules/world/CMakeLists.txt:60 (ocv\_create\_module) > > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2098 (cuda\_compile\_base) > cmake/OpenCVDetectCUDA.cmake:451 (CUDA\_COMPILE) > cmake/OpenCVUtils.cmake:1556 (ocv\_cuda\_compile) > cmake/OpenCVModule.cmake:989 (ocv\_add\_library) > cmake/OpenCVModule.cmake:905 (\_ocv\_create\_module) > modules/world/CMakeLists.txt:60 (ocv\_create\_module) > > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2098 (cuda\_compile\_base) > cmake/OpenCVDetectCUDA.cmake:451 (CUDA\_COMPILE) > > ...... > > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2098 (cuda\_compile\_base) > cmake/OpenCVDetectCUDA.cmake:451 (CUDA\_COMPILE) > cmake/OpenCVUtils.cmake:1556 (ocv\_cuda\_compile) > cmake/OpenCVModule.cmake:989 (ocv\_add\_library) > cmake/OpenCVModule.cmake:905 (\_ocv\_create\_module) > modules/world/CMakeLists.txt:60 (ocv\_create\_module) > > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2098 (cuda\_compile\_base) > cmake/OpenCVDetectCUDA.cmake:451 (CUDA\_COMPILE) > cmake/OpenCVUtils.cmake:1556 (ocv\_cuda\_compile) > cmake/OpenCVModule.cmake:989 (ocv\_add\_library) > cmake/OpenCVModule.cmake:905 (\_ocv\_create\_module) > modules/world/CMakeLists.txt:60 (ocv\_create\_module) > > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2098 (cuda\_compile\_base) > cmake/OpenCVDetectCUDA.cmake:451 (CUDA\_COMPILE) > cmake/OpenCVUtils.cmake:1556 (ocv\_cuda\_compile) > cmake/OpenCVModule.cmake:989 (ocv\_add\_library) > cmake/OpenCVModule.cmake:905 (\_ocv\_create\_module) > modules/world/CMakeLists.txt:60 (ocv\_create\_module) > > CMake Error at /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:1767 (file): > Error evaluating generator expression: > > $\ > > $\ may only be used with binary targets. It may not > be used with add\_custom\_command or add\_custom\_target. Specify the target > to read a property from using the $\ signature > instead. > Call Stack (most recent call first): > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:2085 (CUDA\_WRAP\_SRCS) > /usr/local/share/cmake-3.26/Modules/FindCUDA.cmake:20 > \`\`\` > > > > \### Steps to reproduce > > Just trying the cmake configuration. > > \### Issue submission checklist > > \- \[X\] I report the issue, it's not a question > \- \[X\] I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution > \- \[X\] I updated to the latest OpenCV version and the issue is still there > \- \[X\] There is reproducer code and related data files (videos, images, onnx, etc) now if it is related.