I'm not sure how to compile my zig files to c headers to include in my c main file.
I have my DllMain.c, including an DllMain function. I want to call a function defined in my zig file. How do I configure build.zig to make this happen?
#compile C dll and include zig headers
strange berry
this might be a tough one cause i normally had gotten answers within minutes lol
bright blade
you also havent really been very clear with what you want
you want to call a zig function from C?
https://ziglearn.org/chapter-4/#calling-conventions
this should explain most of it
strange berry
you want to call a zig function from C?
yes
strange berry
https://ziglearn.org/chapter-4/#calling-conventions
this should explain most of...
it does not
that works if what youre building from c is an executable
bright blade
it does, it says how to create a zig function with a C callconv
then you can just call that from C
link against the zig code
strange berry
How do I configure build.zig to make this happen?
bright blade
how do you build your C and Zig code?
strange berry
based off of that build.zig
const Builder = @import("std").build.Builder;
pub fn build(b: *Builder) void {
const lib = b.addSharedLibrary("mathtest", "mathtest.zig", b.version(1, 0, 0));
const exe = b.addExecutable("test", null);
exe.addCSourceFile("test.c", &[_][]const u8{"-std=c99"});
exe.linkLibrary(lib);
exe.linkSystemLibrary("c");
b.default_step.dependOn(&exe.step);
const run_cmd = exe.run();
const test_step = b.step("test", "Test the program");
test_step.dependOn(&run_cmd.step);
}```okay then they should already be linked into the same executable, no?
you can just create a header file containing the right function declaration for the C code to call it
strange berry
is there a way to do that automatically?
bright blade
i think theres a way to tell it to emit headers, check the cli flags and docs
strange berry
when i use emit_h it tries to import zig.h
strange berry
https://ziglearn.org/chapter-4/#calling-conventions
this should explain most of...
yea this doesnt really explain anything
it seems rather outdated
bright blade
its only slightly outdated, only the code samples need a couple changes
the rest of it seems correct
strange berry
even fixing it, it doesnt work
strange berry
https://ziglang.org/learn/overview/#export-functions-variables-and-types-for-c-c...
this still fails to compile
bright blade
doesnt work how
strange berry
when i use emit_h it tries to import `zig.h`
.
if i dont use emit_h, the header just isnt there for the c file
strange berry
excellent