# Undefined reference to all FMOD functions

**URL:** <https://qa.fmod.com/t/undefined-reference-to-all-fmod-functions/18270>\
**Category:** FMOD Engine\
**Tags:** windows\
**Created:** [January 24, 2022, 5:49pm UTC](https://qa.fmod.com/t/undefined-reference-to-all-fmod-functions/18270 "2022-01-24T17:49:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jyb](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@jyb](https://qa.fmod.com/u/jyb)\
**Post date:** [January 24, 2022, 5:49pm UTC](https://qa.fmod.com/t/undefined-reference-to-all-fmod-functions/18270/1 "2022-01-24T17:49:56Z")

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Hello,  
I’m facing the following issue:  
I use two PC, both running Windows 10 version 21H1. Same development tools (C language, MinGW), same installation of FMOD.  
On the first one I successfully compile, link and run my programs using FMOD. On the second one, link fails with messages like this:  
C:\Users\JEAN-Y~1\AppData\Local\Temp\ccIE3ADV.o:testFadeIn.c:(.text+0x364): undefined reference to `FMOD_System_Create@4' C:\Users\JEAN-Y~1\AppData\Local\Temp\ccIE3ADV.o:testFadeIn.c:(.text+0x38e): undefined reference to `FMOD\_System\_SetDriver@8’  
…  
and so on for all the FMOD functions used. I don’t understand where these “@number” come from.  
Does somebody have an idea to solve this?`Preformatted text`

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<div class="post-metadata">

**Author:** ![jyb](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@jyb](https://qa.fmod.com/u/jyb)\
**Post date:** [January 27, 2022, 2:27pm UTC](https://qa.fmod.com/t/undefined-reference-to-all-fmod-functions/18270/2 "2022-01-27T14:27:10Z")

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Hi everybody, it’s me again.  
Ok, don’t worry, the problem is solved.  
The difference between the two PCs was that the first one run MinGW-w64 while the second one (where link failed) used MinGW.  
The second PC remained unused during several years, that’s why I forgot this “detail”.  
Greetings.