I am getting this error but if i go to defination it is working what should i do

Using Arduino Programming Questions
1

C:\Users\sets\AppData\Local\Temp\arduino\sketches\F9E411836453A65EBC4C786CB4811DFC\sketch\kyber786v0.1_test.ino.cpp.o: In function loop': C:\Users\sets\Documents\Arduino\kyber786v0.1_test/kyber786v0.1_test.ino:22: undefined reference to crypto_kem_keypair(unsigned char*, unsigned char*)'
C:\Users\sets\Documents\Arduino\kyber786v0.1_test/kyber786v0.1_test.ino:29: undefined reference to crypto_kem_enc(unsigned char*, unsigned char*, unsigned char const*)' C:\Users\sets\Documents\Arduino\kyber786v0.1_test/kyber786v0.1_test.ino:36: undefined reference to crypto_kem_dec(unsigned char*, unsigned char const*, unsigned char const*)'
collect2.exe: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1

2

Welcome to the forum

As your topic does not relate directly to the installation or operation of the IDE it has been moved to the Programming Questions category of the forum

Please post your full sketch, using code tags when you do

In my experience the easiest way to tidy up the code and add the code tags is as follows
Start by tidying up your code by using Tools/Auto Format in the IDE to make it easier to read. Then use Edit/Copy for Forum and paste what was copied in a new reply. Code tags will have been added to the code to make it easy to read in the forum thus making it easier to provide help.

Which Arduino are you using ?

3

ld is the linker. Go to Definition will take you to the header. So that's there, and your .ino will compile, because by including the header, you're saying, "There's going to be a function named this, and it's going to take these parameters with these types." However, #include will let you grab any file from anywhere; if you find yourself "reaching", that might be the first clue that something is wrong.

You've gotten past the compile stage, and you have a module for your .ino(s), and each one of the library files you used (both board platform libraries like WiFi and third-party libraries like ArduinoJson). Now the linker's job is to "connect the dots", and you get the errors: "They said there was going to be this function with this signature, and it's not here," twice. Did you ever compile the code -- the actual implementation -- that goes with that header?

Looks like the code is some variant of kyber, and the header is kem.h -- the signatures are a bit different. The corresponding implementation is kem.c, which itself includes a bunch of headers with their own implementations, all in the same directory. They all need to be compiled.

If you place that directory under a directory in your sketch named src, then the arduino-cli back-end will find them and try to compile everything. For example, you could try moving the whole Git repo

  • kyber786v0.1_test
    • src
      • kyber
        • ref
          • (all source files here)

Then the header would be used with

#include "src/kyber/ref/kem.h"

However, this very well may not "just work". There are some specific instructions to build this, which may not be applied when arduino-cli builds it. But who knows -- it's worth a try.