Statically linking in a dll which a cdylib links to results in explosive linker error

[sanbox-irl]

Hello!

I have a crate graph like this:

[CORE] -> [SHARED] -> [THING]

Core is a rust library that uses beryllium with the static linking feature on. Shared is a cdylib which has a cargo.toml like this:

[dependencies]
core = { path = "../core-user" }

[lib]
crate-type = ["cdylib"]

CORE is a single line lib.rs like this:

pub use beryllium::*;

(this makes sure that symbols are exported)

and SHARED shows just this function (to make sure that symbols are exported again):

pub use sdl2_user::*;

pub extern "C" fn hello() {
    unsafe {
        sdl2_user::get_error_unchecked();
    }
}

This results in a linker error like so:

          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol SetLastError referenced in function _ZN3std3env11current_dir17he5f1b836db8a0198E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetCurrentDirectoryW referenced in function _ZN3std3env11current_dir17he5f1b836db8a0198E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetEnvironmentStringsW referenced in function _ZN3std3env4vars17h42ceee9b38973e62E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetEnvironmentVariableW referenced in function _ZN3std3env7_var_os17h3c8a99eea2980dd6E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol SetEnvironmentVariableW referenced in function _ZN3std3env8_set_var17he7a29a0d59dc6953E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetTempPathW referenced in function _ZN3std3env8temp_dir17h4bada281cbece498E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetCommandLineW referenced in function _ZN3std3env7args_os17h1ecce28037ed8d46E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol strlen referenced in function _ZN3std3ffi5c_str7CString8from_raw17h4728d381ff641ef8E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol WriteFile referenced in function _ZN3std2fs5write5inner17h3b47f92fd53ddf45E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol FlushFileBuffers referenced in function _ZN3std2fs4File8sync_all17h82624ce9851eb942E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol DuplicateHandle referenced in function _ZN3std2fs4File9try_clone17h0ac83dbacd68725fE
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol ReadFile referenced in function _ZN47_$LT$std..fs..File$u20$as$u20$std..io..Read$GT$4read17h025336fbc570c147E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol SetFilePointerEx referenced in function _ZN47_$LT$std..fs..File$u20$as$u20$std..io..Seek$GT$4seek17h83cd02b5dc4d18f2E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol EnterCriticalSection referenced in function _ZN3std2io5stdio6Stdout4lock17h5715c9b1b9fabe02E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol WaitForSingleObject referenced in function _ZN3std7process7Command6status17h3c88f12b0a48c645E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetExitCodeProcess referenced in function _ZN3std7process7Command6status17h3c88f12b0a48c645E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol TerminateProcess referenced in function _ZN3std7process5Child4kill17he184217fdd10741aE
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetProcessId referenced in function _ZN3std7process5Child2id17h06ca3cd212f03301E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol CreateEventW referenced in function _ZN3std7process5Child16wait_with_output17h43ad5107058e3ca9E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol WaitForMultipleObjects referenced in function _ZN3std7process5Child16wait_with_output17h43ad5107058e3ca9E
          libstd-0087fff1d6c84113.rlib(std-0087fff1d6c84113.std.rcc8w0m2-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol GetOverlapp`
          ```
          
          and on and on.

Using the DLL, these problems go away

[Lokathor]

That's quite the wild linker error. I'm not eve slightly sure how you'd fix it. If using the DLL fixes things then you should do that.

[sanbox-irl]

👍 I get a very similar error with SDL2-rs as well