How to detour the known "error: dependency loop detected" from a generated cimport.zig?

gegogi · July 19, 2025, 12:51pm

I have a C system header file in my project looking like:

struct SLObjectItf_;
typedef const struct SLObjectItf_ * const * SLObjectItf;
typedef void (SLAPIENTRY *slObjectCallback) (
    SLObjectItf caller,
    const void * pContext,
    SLuint32 event,
    SLresult result,
    SLuint32 param,
    void *pInterface
);  
struct SLObjectItf_ {
    SLresult (*Realize) (
        SLObjectItf self,
        SLboolean async
    );
};

and this generates cimport.zig in a temp dir looking like:

pub const SLObjectItf = [*c]const [*c]const struct_SLObjectItf_;
pub const slObjectCallback = ?*const fn (SLObjectItf, ?*const anyopaque, SLuint32, SLresult, SLuint32, ?*anyopaque) callconv(.c) void;
pub const struct_SLObjectItf_ = extern struct {
    Realize: ?*const fn (SLObjectItf, SLboolean) callconv(.c) SLresult = @import("std").mem.zeroes(?*const fn (SLObjectItf, SLboolean) callconv(.c) SLresult),

which leads to a compile error:

/Users/gegogi/Projects/ZigAndroidTemplate/.zig-cache/o/a5b25ca4bcb5cff9410caf68f212b2b5/cimport.zig:1025:5: error: dependency loop detected
pub const SLObjectItf = [*c]const [*c]const struct_SLObjectItf_;
~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
referenced by:
    struct_SLObjectItf_: /Users/gegogi/Projects/ZigAndroidTemplate/.zig-cache/o/a5b25ca4bcb5cff9410caf68f212b2b5/cimport.zig:1027:40
    SLObjectItf: /Users/gegogi/Projects/ZigAndroidTemplate/.zig-cache/o/a5b25ca4bcb5cff9410caf68f212b2b5/cimport.zig:1025:45
    17 reference(s) hidden; use '-freference-trace=19' to see all references

because of a known issue:

github.com/ziglang/zig

incorrect "error: dependency loop detected"

opened 11:42PM - 15 Jul 23 UTC

buzmeg

bug frontend

### Zig Version 0.11.0-dev.3952+82a9d5d78 ### Steps to Reproduce and Observed …Behavior The following code refuses to compile on 0.11.0-dev.3952+82a9d5d78 but compiles just fine on Godbolt on 0.10.0. So, the dependency loop error if presumably false. ``` src/main.zig:16:1: error: dependency loop detected const ContinuationStackType = std.BoundedArray(SmolkContinuationNative, MAX_CONTINUATION_STACK_SIZE); ``` ```zig const std = @import("std"); const KO_Ref = u16; const KO_State = u16; const KOErr = error { GENERIC, }; const MAX_CONTINUATION_STACK_SIZE = 8; const ContinuationStackType = std.BoundedArray(SmolkContinuationNative, MAX_CONTINUATION_STACK_SIZE); var kont_continuation_stack: ContinuationStackType = .{}; const SmolkPointerContinuationFunction = *const fn (pkos: *KO_State, kont_stack: *ContinuationStackType, args: SmolkContinuationNative) KOErr!SmolkContinuationNative; const SMOLK_CONTINUATION_INITIAL_CALL_STATE = 1; const SmolkContinuationNative = struct { pcfn: SmolkPointerContinuationFunction, kor_result: KO_Ref, }; pub fn kont_fail(pkos: *KO_State, kont_stack: *ContinuationStackType, args: SmolkContinuationNative) KOErr!SmolkContinuationNative { _ = pkos; _ = kont_stack; _ = args; std.debug.print("FAIL!\n", .{}); return KOErr.GENERIC; } pub fn main() !void { try kont_continuation_stack.append(.{ .pcfn = kont_fail, .kor_result = 0, }); std.debug.print("Stack: {any}\n", .{kont_continuation_stack}); } ``` ### Expected Behavior Expected to compile.

I read that instead of using SLObjectItf for the function declaration I can use *anyopaque to detour the problem.
But cimport.zip is a generated file and I don’t know what to do.