# \[Linux\] SliceOpenCV build

**URL:** <https://discourse.slicer.org/t/linux-sliceopencv-build/23269>\
**Category:** Development\
**Tags:** opencv, linux, sliceropencv\
**Created:** [May 3, 2022, 9:17pm UTC](https://discourse.slicer.org/t/linux-sliceopencv-build/23269 "2022-05-03T21:17:11Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![adamrankin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamrankin/32/155_2.png) [@adamrankin](https://discourse.slicer.org/u/adamrankin)\
**Post date:** [May 3, 2022, 9:17pm UTC](https://discourse.slicer.org/t/linux-sliceopencv-build/23269/1 "2022-05-03T21:17:11Z")

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I am trying to fix the SlicerOpenCV build in order to re-enable the extension, but I am experiencing some roadblocks. I am able to successfully build the extension on Ubuntu 20.04 with gcc 9.x.

I notice that the build machine is on gcc 7.y. This is probably the reason, right?

I’m trying to make sense of the build error but I don’t know if I’m missing something in the build machine log output

[https://slicer.cdash.org/viewBuildError.php?buildid=2670747](https://slicer.cdash.org/viewBuildError.php?buildid=2670747)

@Sam_Horvath is it possible to set up a 20.04 build machine to see if it passes?

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**Author:** ![Mik](https://avatars.discourse-cdn.com/v4/letter/m/958977/32.png) [@Mik](https://discourse.slicer.org/u/Mik)\
**Post date:** [May 4, 2022, 12:32pm UTC](https://discourse.slicer.org/t/linux-sliceopencv-build/23269/2 "2022-05-04T12:32:14Z")

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I was able to compile SlicerOpenCV with gcc-11.2 on my local machine. The main issue in my case was the correct path to OpenCV cmake files.

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<div class="post-metadata">

**Author:** ![adamrankin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamrankin/32/155_2.png) [@adamrankin](https://discourse.slicer.org/u/adamrankin)\
**Post date:** [May 5, 2022, 2:58pm UTC](https://discourse.slicer.org/t/linux-sliceopencv-build/23269/3 "2022-05-05T14:58:37Z")

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Build fixed. OpenCV install folder was distribution dependent (lib on some, lib64 on others). Explicitly setting this fixed the issue.