Getting "Undefined reference to" errors when building S-Function using S-Function Builder block

I am creating a S-Function in simulink with the S-Function Builder block. I was initially facing "file not found" errors for some of the headers I am using in the code which got resolved after I put the entire path to the headers and source files in the libraries tab of the builder. However, I am now getting "undefined reference to" errors for all the functions that use the headers I included.

C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x76): undefined reference to `Fee_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x7b): undefined reference to `MemAcc_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x80): undefined reference to `Fee_GetStatus' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0xa5): undefined reference to `Fee_Read' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0xb6): undefined reference to `Fee_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0xbb): undefined reference to `MemAcc_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0xc0): undefined reference to `Fee_GetStatus' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0xe8): undefined reference to `Fee_Read' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0xf6): undefined reference to `Fee_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0xfb): undefined reference to `MemAcc_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x100): undefined reference to `Fee_GetStatus' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x128): undefined reference to `Fee_Read' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x136): undefined reference to `Fee_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x13b): undefined reference to `MemAcc_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x140): undefined reference to `Fee_GetStatus' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x168): undefined reference to `Fee_Read' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x176): undefined reference to `Fee_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x17b): undefined reference to `MemAcc_MainFunction' C:\Users\User\AppData\Local\Temp\mex_90014370683397_13052\NVMRead_wrapper.obj:NVMRead_wrapper.c:(.text+0x180): undefined reference to `Fee_GetStatus'

How do I resolve this? I am using Matlab 2022a

[Piyush Kumar]

Hi Saiesh,

Refer to the "Use the Libraries Table to Specify External Code and Paths" section of the documentation - https://www.mathworks.com/help/releases/R2022a/simulink/sfg/s-function-builder-dialog-box.html and make sure that you are including the header and source files as mentioned in the documentation link. There are some examples available in the doc as well.

[Saiesh Singh]

Hi Piyush,

It would seem I missed adding the ENTRY for the source files. With that the "undefined reference to" errors are gone but now I am getting some new errors:

C:\Users\User\AppData\Local\Temp\ccgb5CZf.s: Assembler messages: C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:16: Error: no such instruction: `mrs %eax,primask' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:43: Error: no such instruction: `mrs %ecx,primask' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:62: Error: no such instruction: `cpsid i' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:95: Error: no such instruction: `cpsie i' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:124: Error: no such instruction: `mrs %ecx,primask' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:143: Error: no such instruction: `cpsid i' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:176: Error: no such instruction: `cpsie i' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:205: Error: no such instruction: `mrs %ecx,primask' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:224: Error: no such instruction: `cpsid i' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:257: Error: no such instruction: `cpsie i' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:286: Error: no such instruction: `mrs %ecx,primask' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:305: Error: no such instruction: `cpsid i' C:\Users\User\AppData\Local\Temp\ccgb5CZf.s:338: Error: no such instruction: `cpsie i'

Component:S-function Builder | Category:Build error

What could be the issue?