[Issue 23614] ImportC: __int128 not supported

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23614

--- Comment #5 from Jacob Carlborg <doob at me.com> ---
(In reply to Jacob Carlborg from comment #4)
> Here's the full preprocessor logic:
> 
> #if !defined BR_INT128 && !defined BR_UMUL128
> #ifdef __SIZEOF_INT128__
> #define BR_INT128    1
> #elif _M_X64
> #define BR_UMUL128   1
> #endif
> #endif
> 
> Then rest of the code checks for "BR_INT128" and "BR_UMUL128". Perhaps
> "_M_X64" should be undefined as well.

It's available here [1]. I'm trying to compile BearSSL [2]. I'm just running
DMD on the files in the "src" directory and reporting issues as I find them.

It's quite a bit problematic that the Clang preprocessor is used, which
supports a bunch of extensions that DMD doesn't support.

[1]
https://bearssl.org/gitweb/?p=BearSSL;a=blob;f=src/inner.h;h=07e1d0a478e801a91580658918130fb8b595e407;hb=HEAD#l403

[2] https://bearssl.org/#download-and-installation

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