# Difficulties installing ITK4.10.0 as rusage be no longer used

**URL:** https://discourse.itk.org/t/difficulties-installing-itk4-10-0-as-rusage-be-no-longer-used/4166
**Category:** Engineering
**Tags:** simpleitk
**Created:** [May 28, 2021, 2:07pm UTC](https://discourse.itk.org/t/difficulties-installing-itk4-10-0-as-rusage-be-no-longer-used/4166 "2021-05-28T14:07:50Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![mausam](https://discourse.itk.org/letter_avatar_proxy/v4/letter/m/ccd318/32.png) [@mausam](https://discourse.itk.org/u/mausam)
#### Post date: [May 28, 2021, 2:07pm UTC](https://discourse.itk.org/t/difficulties-installing-itk4-10-0-as-rusage-be-no-longer-used/4166/1 "2021-05-28T14:07:50Z")

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I am trying to install itk4.10.0 version, However, I am getting the following error. I have attempted to google the answer but have not found anything. Any and all help would be very much appreciated!

```auto
**InsightToolkit-4.10.0/Modules/Core/Common/src/itkMemoryUsageObserver.cxx:449:79: error: ‘struct rusage’ has no member named ‘ru_ixrss’
     return static_cast<MemoryUsageObserverBase::MemoryLoadType> (resourceInfo.ru_ixrss);**

```

I checked the man age of getusage, there it seems they stopped maintaining the “ru\_ixrss (unmaintained) This field is currently unused on Linux”.

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### Author: ![dzenanz](https://discourse.itk.org/user_avatar/discourse.itk.org/dzenanz/32/1093_2.png) [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [May 28, 2021, 2:43pm UTC](https://discourse.itk.org/t/difficulties-installing-itk4-10-0-as-rusage-be-no-longer-used/4166/2 "2021-05-28T14:43:25Z")

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ITK 4.10 is fairly old by now. Version [4.13.3](https://github.com/InsightSoftwareConsortium/ITK/releases/tag/v4.13.3) should be backwards compatible with 4.10, and should work better on newer compilers. If that does not help, you will have to [migrate your application to v5](https://github.com/InsightSoftwareConsortium/ITK/blob/master/Documentation/ITK5MigrationGuide.md) (recommended), or fix the compile issues yourself. The last commit in 4.13.3 is titled “added vcl compiler detection for GCC 10.x”.