# Freertos 6 doesn't work...

**URL:** <https://forums.freertos.org/t/freertos-6-doesnt-work/1920>\
**Category:** Kernel\
**Created:** [April 26, 2010, 4:30pm UTC](https://forums.freertos.org/t/freertos-6-doesnt-work/1920 "2010-04-26T16:30:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [April 26, 2010, 4:30pm UTC](https://forums.freertos.org/t/freertos-6-doesnt-work/1920/1 "2010-04-26T16:30:28Z")

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**[penauser](https://sourceforge.net/u/penauser/)** wrote on [Monday, April 26, 2010](https://sourceforge.net/p/freertos/discussion/382005/thread/5186ab65/#320f):

Hi everyone.&nbsp; I have tried to install FreeRtos 6 in my PC but it doesn’t work.  
If I try to build /demo/ARM7\_LPC2106\_GCC examples the next error occurs:

cc1.exe: error: unrecognized command line option “-fno-dwarf2-cfi-asm”  
make: \*\*\*&nbsp; Error 1

Does anyone know what it means and how I can fix it, please?

And FreeRtos 5 works very well in my PC…

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**Author:** ![rtel](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/rtel/32/31_2.png) [@rtel](https://forums.freertos.org/u/rtel)\
**Post date:** [April 26, 2010, 5:35pm UTC](https://forums.freertos.org/t/freertos-6-doesnt-work/1920/2 "2010-04-26T17:35:28Z")

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**[rtel](https://sourceforge.net/u/rtel/)** wrote on [Monday, April 26, 2010](https://sourceforge.net/p/freertos/discussion/382005/thread/5186ab65/#60af):

I just tried a clean build and it built without any errors or warnings.

Did you call one of the batch files to perform the build?

I used arm-elf-gcc v4.4.2.

Regards.

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [April 27, 2010, 4:53pm UTC](https://forums.freertos.org/t/freertos-6-doesnt-work/1920/3 "2010-04-27T16:53:04Z")

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**[penauser](https://sourceforge.net/u/penauser/)** wrote on [Tuesday, April 27, 2010](https://sourceforge.net/p/freertos/discussion/382005/thread/5186ab65/#c8a4):

Thanks richardbarry,  
I have run all batch files(rom\_arm, rom\_thumb, ram\_arm and ram\_thumb) and all given the same error.  
But my arm-elf-gcc version is 4.2.2.&nbsp; Maybe this is reason about that?  
I will try to install it…

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [April 28, 2010, 11:22am UTC](https://forums.freertos.org/t/freertos-6-doesnt-work/1920/4 "2010-04-28T11:22:12Z")

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**[penauser](https://sourceforge.net/u/penauser/)** wrote on [Wednesday, April 28, 2010](https://sourceforge.net/p/freertos/discussion/382005/thread/5186ab65/#10ab):

Ok, I installed 4.4.2 version and now it works…