Building fails if we only have one use statement

[soupslurpr]

Hi, when my project only uses one use statement, building seems to fail. Adding another use statement fixes it even if we don't use that crate.

error: linking with `C:/Users/user/AppData/Local/Android/Sdk/ndk/26.0.10404224/toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android28-clang.cmd` failed: exit code: 255
  |
  = note: "C:/Users/user/AppData/Local/Android/Sdk/ndk/26.0.10404224/toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android28-clang.cmd" "-Wl,--version-script=C:\\Users\\user\\AppData\\Local\\Temp\\rustcqKh8Wv\\list" "-Wl,--no-undefined-version" "C:\\Users\\user\\AppData\\Local\\Temp\\rustcqKh8Wv\\symbols.o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\beautyxt_rs.beautyxt_rs.1b8e755c7177c1b0-cgu.0.rcgu.o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\beautyxt_rs.beautyxt_rs.1b8e755c7177c1b0-cgu.1.rcgu.o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\beautyxt_rs.beautyxt_rs.1b8e755c7177c1b0-cgu.2.rcgu.o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\beautyxt_rs.beautyxt_rs.1b8e755c7177c1b0-cgu.3.rcgu.o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\beautyxt_rs.beautyxt_rs.1b8e755c7177c1b0-cgu.4.rcgu.o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\beautyxt_rs.beautyxt_rs.1b8e755c7177c1b0-cgu.5.rcgu.o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\beautyxt_rs.kaw1riddub6yrk0.rcgu.o" "-Wl,--as-needed" "-L" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps" "-L" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\release\\deps" "-L" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib" "-Wl,-Bstatic" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libuniffi-b894bbf02c48ebf0.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libuniffi_core-6226400175510933.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libstatic_assertions-60495758fec0315b.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\liblog-5c8c9aee221ad39e.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libbytes-e0063d400bfce6ab.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libanyhow-ff64bf14315878f9.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\librand-032b9a32dea1e825.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\librand_chacha-cea2c6ba05033ade.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libppv_lite86-4160ad67ba8df325.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\librand_core-1ae93b0f9d6556d2.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libgetrandom-1198d1d02bf00ab6.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\liblibc-697cb05f9c1130b4.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libcfg_if-417a3e028828f414.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libmarkdown-948b89adb0debfda.rlib" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libunicode_id-132e772bd1eabc8b.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libstd-ac66c519fc156681.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libpanic_unwind-912ceb4ed27fa292.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libobject-441ec0e71c8e980c.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libmemchr-acd78dad9f8401c4.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libaddr2line-7b704a3c89aa174c.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libgimli-cd1fe07296f81fee.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\librustc_demangle-766020562c253a48.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libstd_detect-ac958e006f9b7c1d.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libhashbrown-401234bdf22f1b04.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\librustc_std_workspace_alloc-a11da6c8c9e85f3f.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libminiz_oxide-239f6c17d65178a6.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libadler-0f8ec39c10f7fd09.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libunwind-7159137f89f3c748.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libcfg_if-86e237c6796fdcf5.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\liblibc-b5d72488d897814c.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\liballoc-0dec43b07835310f.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\librustc_std_workspace_core-6b4a9c00321aed49.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libcore-0a2081d099bc47f7.rlib" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libcompiler_builtins-40056501c2ca4013.rlib" "-Wl,-Bdynamic" "-lc" "-lm" "-ldl" "-llog" "-lunwind" "-ldl" "-lm" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "C:\\Users\\user\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib" "-o" "C:\\Users\\user\\projects\\BeauTyXT\\beautyxt_rs\\target\\aarch64-linux-android\\release\\deps\\libbeautyxt_rs.so" "-Wl,--gc-sections" "-shared" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-nodefaultlibs"
  = note: --version-script=C:\Users\user\AppData\Local\Temp\rustcqKh8Wv\list"" was unexpected at this time.

[badboy]

Please specify the code that works and the one that fails, otherwise we have to randomly guess what use statement fixes your build.

[soupslurpr]

Oh right, sorry about that.

It is really weird, it randomly started working again but with one or more use statement only, specifically I am using the comrak crate. The below code fails with the same error I already showed, but everything is fine after importing comrak even though it isn't using it. Importing something else like rand still shows the error.

I was running cargo build --lib --release --target aarch64-linux-android

uniffi::setup_scaffolding!();

#[uniffi::export]
pub fn markdown_to_html(markdown: String) -> String {
    markdown
}

Below builds fine.

use comrak::{ListStyleType, ComrakOptions, ComrakExtensionOptions, ComrakParseOptions, ComrakRenderOptions};

uniffi::setup_scaffolding!();

#[uniffi::export]
pub fn markdown_to_html(markdown: String) -> String {
    markdown
}

I also copied the project, removed all dependencies including uniffi, cargo clean, and then tried to build, and I still got the same error. So maybe it is not a uniffi issue?

[badboy]

If you can remove UniFFI and it still fails as above then yes, something else is broken.

Though I still ask: Which version of UniFFI are you using?

[soupslurpr]

I'm using the latest commit, I tried using a version from before I got the issue and it didn't solve it

[badboy]

Looks like this might be an issue with rust: rust-lang/rust#113711

[soupslurpr]

Thanks for finding that, I probably should have searched there too instead of only google and the uniffi issue tracker. The workaround in android/ndk#1856 (comment) works and builds without errors.

[badboy]

Thanks for reporting back. Closing this issue then.