Visual Studio build

[chfast]

I've seen Visual Studio related PRs. Is there any working Visual Studio build? What about big number implementation? @ximinez?

[sipa]

There is no need for a bignum implementation. It gives a mild performance boost to have gmp for computing modular inverses, but you can compile without. Furthermore, @apoelstra is working on a native fast modular inverse, so we have drop the GMP requirement entirely.

[chfast]

Thanks, good to know that.
Last time I was playing with cmake (#315) I had to define USE_NUM_GMP.

[apoelstra]

@chfast defining USE_NUM_NONE should have also worked for you.

[chfast]

Yes, it works.

[ZeroXn]

How can I include this in my visual studio project?
I have included the header files, but not sure how i actually compile the library?

So far i have only added the include folder to my additional include directories, im my project properties, and get a LNK2019 unresolved external symbol _secp256k1_context_create referenced in function when i try and compile my project.

Any hints would be great! Thanks!
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[evoskuil]

@ZeroXn see: https://github.com/evoskuil/secp256k1/tree/version4/builds/msvc