# Can't build GuiApp with tracktion\_engine on raspberry pi

**URL:** <https://forum.juce.com/t/cant-build-guiapp-with-tracktion-engine-on-raspberry-pi/50068>\
**Category:** CMake\
**Created:** [February 7, 2022, 11:51am UTC](https://forum.juce.com/t/cant-build-guiapp-with-tracktion-engine-on-raspberry-pi/50068 "2022-02-07T11:51:04Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![stonepresto](https://avatars.discourse-cdn.com/v4/letter/s/9f8e36/32.png) [@stonepresto](https://forum.juce.com/u/stonepresto)\
**Post date:** [June 13, 2022, 1:27pm UTC](https://forum.juce.com/t/cant-build-guiapp-with-tracktion-engine-on-raspberry-pi/50068/21 "2022-06-13T13:27:06Z")

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Unfortunately its failing on that branch as well with the same error. I will look into it later today or tomorrow and see if I can find out why it suddenly started throwing out that error. Definitely seems to be related to the allocator used in that one test. @lucian303 is correct that commenting out line 161 that calls shrink to fit is a workaround (although that might cause the test to fail)

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**Author:** ![stonepresto](https://avatars.discourse-cdn.com/v4/letter/s/9f8e36/32.png) [@stonepresto](https://forum.juce.com/u/stonepresto)\
**Post date:** [June 21, 2022, 6:58pm UTC](https://forum.juce.com/t/cant-build-guiapp-with-tracktion-engine-on-raspberry-pi/50068/22 "2022-06-21T18:58:12Z")

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I have found a fix for the issue and created a [PR](https://github.com/Tracktion/tracktion_engine/pull/120) into tracktion engine.

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**Author:** ![dave96](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/dave96/32/8487_2.png) [@dave96](https://forum.juce.com/u/dave96)\
**Post date:** [June 23, 2022, 4:16pm UTC](https://forum.juce.com/t/cant-build-guiapp-with-tracktion-engine-on-raspberry-pi/50068/23 "2022-06-23T16:16:24Z")

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Thanks very much. Fixed here: [rpallocator: Added comparison operators to fix issues with newer co… · Tracktion/tracktion\_engine@edd6fb6 · GitHub](https://github.com/Tracktion/tracktion_engine/commit/edd6fb6b0e23aad25463ee2425d8ec9c9d38d918)

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