Differences between windows build files

[mattnappo]

This is not an issue, but a question. When building Argon2 on Windows, with Visual Studio, the build folder is created. The build folder has all of the .dll and .lib files. The readme.md file says to compile the test script with this command:
gcc test.c libargon2.a -Isrc -o test
Because I am on Windows, I can not use the libargon2.a file (I think this is correct). So, my question is, which dll file from the Visual Studio build folder should I use instead of libargon2.a? Or should I use a .lib file? My guess is either Argon2RefDll.dll or Argon2OptDll.dll. What is the difference between Ref and Opt? Thanks.

[daniel-dinu]

If you look at the source files compiled in Argon2RefDll and Argon2OptDll, you can see that one project uses ref.c and the other uses opt.c. ref corresponds to a portable C implementation, while opt corresponds to an optimized C implementation that uses AVX.

[mattnappo]

Okay. So both should work when compiling?

[mattnappo]

Because when I use Argon2OptDll.dll or Argon2RefDll.dll with this compile command:
gcc test.c Argon2OptDll.dll -Isrc -o test
I get this error:

undefined reference to `argon2i_hash_raw'
undefined reference to `argon2i_ctx'
undefined reference to `argon2_error_message'

[sneves]

It seems like you are not giving the correct path to the dll? I tried

gcc test.c -I include vs2015\build\Argon2RefDll.dll

and it worked.

[mattnappo]

what does include do?

[sneves]

include is the directory where argon2.h is. The readme says -Isrc, but that is not correct anymore.