Failure to define static const strucs. Left with only declarations.

[ephraimfeldblum]

I'm trying to use a c header in my rust module, using bindgen to translate it, but bindgen seems to not parse it as well as it could have. It seems to be merely declaring the struct without defining it.

Input C/C++ Header

typedef struct MyLib_Foo {
    uint64_t x;
    uint64_t y;
} MyLib_Foo;

static const MyLib_Foo MyLib_Bar = { 0, 1 }, MyLib_Baz = {...}, ...;

Bindgen Invocation

bindgen::Builder::default()
    .header("mylib.h")
    .allowlist_var("(MYLIB|MyLib).*")
    .allowlist_type("MyLib.*")
    .generate()
    .unwrap()

Actual Results

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct MyLib_Foo {
    pub x: u64,
    pub y: u64,
}

extern "C" {
    pub static MyLib_Bar: MyLib_Foo;
}
...

$ nm -A -C path/to/library.so | grep MyLib_Bar
path/to/library.so:                 U MyLib_Bar

Expected Results

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct MyLib_Foo {
    pub x: u64,
    pub y: u64,
}

const MyLib_Bar: MyLib_Foo = MyLIb_Foo{x: 0, y: 1};
...

$ nm -A -C path/to/library.so | grep MyLib_Bar
path/to/library.so:xxxxxxxxxxxxxxxx r MyLib_Bar

[ephraimfeldblum]

These seem like they may be relevant. Has nothing been done about this issue since 2018?
#1266
#1524

[pvdrz]

I believe that this might still be a upstream issue, see this comment. I'll check if this is still the case or not.

[pvdrz]

I'm closing this as it is a duplicate of #1266

PD: There has not been any movement from the LLVM side either https://bugs.llvm.org/show_bug.cgi?id=36576