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Easy way for FFI
September 22
Gravatar of Maximilian NadererPosted by Maximilian NadererReply
Maximilian Naderer
Gravatar of Maximilian Naderer


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Hello,
so what are my / our best options to create an automatic C foreign function interface.

I would like to create such interface / header file from a D module with public functions, structs which are declared with extern(C)

D code

module leo

extern(C) void test() { }

Expectation:

// header file
void leo_test(void);

September 23
Gravatar of Richard (Rikki) Andrew CattermolePosted by Richard (Rikki) Andrew Cattermole
in reply to Maximilian Naderer		Reply
Richard (Rikki) Andrew Cattermole
Gravatar of Richard (Rikki) Andrew Cattermole
Posted in reply to Maximilian Naderer


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There are a number of solutions for C bindings creation.

Try ImportC its built into the compiler.

You can use the .di generator to emit a D file for further use and manual cleanup.

https://dlang.org/spec/importc.html

It does depend upon the system toolchain, so you'll want MSVC installed if you use Windows.
September 22
Gravatar of Maximilian NadererPosted by Maximilian Naderer
in reply to Richard (Rikki) Andrew Cattermole		Reply
Maximilian Naderer
Gravatar of Maximilian Naderer
Posted in reply to Richard (Rikki) Andrew Cattermole


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Hello Richard,

Thank you for the info. I thought this goes the other way around. Using a header file and converting it to a .di file.

I want to create a .h file from my D modules so you’re saying this should be also possible ?
September 23
Gravatar of Richard (Rikki) Andrew CattermolePosted by Richard (Rikki) Andrew Cattermole
in reply to Maximilian Naderer		Reply
Richard (Rikki) Andrew Cattermole
Gravatar of Richard (Rikki) Andrew Cattermole
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On 23/09/2024 10:13 AM, Maximilian Naderer wrote:
> I want to create a .h file from my D modules so you’re saying this should be also possible ?

There is support in the compiler, but its not really mature.

https://dlang.org/dmd-windows.html#switch-HC[