Linker error when building pure rust project

[TyOverby]

There is too much code for me to upload, but what is happening is this:

I have a library "Lux". Lux builds just fine when run with cargo build. One of the tests however, uses functionality in Lux, and the compiler crashes with a linker error.

error: linking with `cc` failed: exit code: 1
note: cc '-Wl,--as-needed' '-m64' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-o' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/examples/spritesheet' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/examples/spritesheet.o' '-Wl,--whole-archive' '-lmorestack' '-Wl,--no-whole-archive' '-Wl,--gc-sections' '-pie' '-nodefaultlibs' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/liblux-0044c44cb706a208.rlib' '-L' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps' '-lglium_macros-0d63a9614c44c703' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lrustc-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lrustc_back-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lsyntax-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lterm-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lrustc_llvm-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-larena-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lgetopts-4e7c5e5c' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libvecmath-350a77008be8648b.rlib' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lrbml-4e7c5e5c' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglium-af9a1675d224f665.rlib' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglutin-abe6f4e5d9a1c8bb.rlib' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libcgmath-40919635fc2a19d7.rlib' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libimage-49298ff37d3495f7.rlib' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libnum-5b0bc2450b7c80b1.rlib' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libnalgebra-1b2cab07beb57e5d.rlib' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/librustc-serialize-32ba0ff0c50e3a4d.rlib' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lflate-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lfmt_macros-4e7c5e5c' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libgl_common-f44d989b8724e1a7.rlib' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lserialize-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-llog-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lregex-4e7c5e5c' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libtypemap-3efd7ccbb9d24a2a.rlib' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libunsafe-any-3f018797a3613438.rlib' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lgraphviz-4e7c5e5c' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lstd-4e7c5e5c' '-L' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target' '-L' '/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps' '-L' '/usr/lib64' '-L' '/usr/lib64' '-L' '/homes/iws/tyoverby/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-L' '/homes/iws/tyoverby/workspace/Personal/rust/lux/.rust/lib/x86_64-unknown-linux-gnu' '-L' '/homes/iws/tyoverby/workspace/Personal/rust/lux/lib/x86_64-unknown-linux-gnu' '-Wl,--whole-archive' '-Wl,-Bstatic' '-Wl,--no-whole-archive' '-Wl,-Bdynamic' '-lpthread' '-lrt' '-ldl' '-lm' '-lGL' '-lX11' '-lXxf86vm' '-lXcursor' '-ldl' '-lpthread' '-lrt' '-lgcc_s' '-lpthread' '-lc' '-lm' '-lcompiler-rt'
note: /homes/iws/tyoverby/workspace/Personal/rust/lux/target/examples/spritesheet.o: In function `spritesheet::main':
/homes/iws/tyoverby/workspace/Personal/rust/lux/examples/spritesheet.rs:20: undefined reference to `sprite::SpriteSheet::get::hb2fae00cafba72c7sMc'
collect2: error: ld returned 1 exit status

error: aborting due to previous error
Could not compile `lux`.

[steveklabnik]

what does cargo build --verbose say?

[alexcrichton]

There are some know linkage errors related to privacy, would it be possible for me to peek at the code to reproduce and see what's going on?

[TyOverby]

@steveklabnik cargo build is the one that works, so it gives me

bash-4.2$ cargo build --verbose
       Fresh khronos_api v0.0.4
       Fresh pkg-config v0.1.5
       Fresh unsafe-any v0.2.1
       Fresh regex v0.1.10
       Fresh bitflags v0.1.0
       Fresh glium_macros v0.0.1 (https://github.com/tomaka/glium.git#fe9e2b5b)
       Fresh rustc-serialize v0.2.8
       Fresh vecmath v0.0.3 (https://github.com/PistonDevelopers/vecmath#3080ca14)
       Fresh phantom v0.0.3
       Fresh gl_common v0.0.3
       Fresh compile_msg v0.1.3 (https://github.com/huonw/compile_msg#b19da50c)
       Fresh khronos_api v0.0.5
       Fresh log v0.1.9
       Fresh xml-rs v0.1.13
       Fresh nalgebra v0.2.0 (https://github.com/sebcrozet/nalgebra#713589ff)
       Fresh num v0.1.9 (https://github.com/rust-lang/num#51b94c5e)
       Fresh cgmath v0.0.1 (https://github.com/bjz/cgmath-rs#9bb77e6a)
       Fresh typemap v0.0.8 (https://github.com/reem/rust-typemap#3594b654)
       Fresh gl_generator v0.0.12
       Fresh image v0.2.0-alpha.6 (https://github.com/PistonDevelopers/image#52fe4324)
       Fresh libz-sys v0.1.0
       Fresh freetype-sys v0.0.2 (https://github.com/PistonDevelopers/freetype-sys#b0c1eaa3)
       Fresh glutin v0.0.4-pre (https://github.com/tomaka/glutin.git#13be9b25)
       Fresh freetype-rs v0.0.3 (https://github.com/PistonDevelopers/freetype-rs#b3db542d)
       Fresh glium v0.0.2 (https://github.com/tomaka/glium.git#fe9e2b5b)
   Compiling lux v0.0.1 (file:///homes/iws/tyoverby/workspace/Personal/rust/lux)
     Running `rustc src/lib.rs --crate-name lux --crate-type lib -g -C metadata=0044c44cb706a208 -C extra-filename=-0044c44cb706a208 --out-dir /homes/iws/tyoverby/workspace/Personal/rust/lux/target --emit=dep-info,link -L dependency=/homes/iws/tyoverby/workspace/Personal/rust/lux/target -L dependency=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps --extern freetype=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libfreetype-47f57fe79f3e1411.rlib --extern glutin=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglutin-abe6f4e5d9a1c8bb.rlib --extern vecmath=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libvecmath-350a77008be8648b.rlib --extern glium_macros=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglium_macros-0d63a9614c44c703.so --extern image=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libimage-49298ff37d3495f7.rlib --extern glium=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglium-af9a1675d224f665.rlib --extern typemap=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libtypemap-3efd7ccbb9d24a2a.rlib -L native=/usr/lib64 -L native=/usr/lib64`
     Running `rustc src/bin.rs --crate-name lux_demo --crate-type bin -g --out-dir /homes/iws/tyoverby/workspace/Personal/rust/lux/target --emit=dep-info,link -L dependency=/homes/iws/tyoverby/workspace/Personal/rust/lux/target -L dependency=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps --extern freetype=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libfreetype-47f57fe79f3e1411.rlib --extern glutin=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglutin-abe6f4e5d9a1c8bb.rlib --extern vecmath=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libvecmath-350a77008be8648b.rlib --extern glium_macros=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglium_macros-0d63a9614c44c703.so --extern image=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libimage-49298ff37d3495f7.rlib --extern glium=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libglium-af9a1675d224f665.rlib --extern typemap=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/deps/libtypemap-3efd7ccbb9d24a2a.rlib --extern lux=/homes/iws/tyoverby/workspace/Personal/rust/lux/target/liblux-0044c44cb706a208.rlib -L native=/usr/lib64 -L native=/usr/lib64`
src/bin.rs:29:5: 29:33 warning: unused result which must be used, #[warn(unused_must_use)] on by default
src/bin.rs:29     face.set_pixel_sizes(0, 48);
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

[TyOverby]

@alexcrichton: I added you as a collaborator on the repo. The issue lies with examples/spritesheet.rs and src/sprite.rs.

[TyOverby]

@alexcrichton:

going off of your hunch that it has to do with visibility, I discovered that I wasn't correctly reexporting the type from the crate. I didn't notice this because I'm used to getting the compiler warning (error?) about using private types in a public API.

[alexcrichton]

Yeah the bug I'm thinking of is #16734. Thanks for giving me access! I'll investigate when I get a chance and see if I can confirm a dupe of #16734 or get a minimized example.

[alexcrichton]

Ok, checked it out and did some investigation, and it looks like this is indeed a dupe of #16734, thanks for letting me poke around!

[TyOverby]

No prob! Thanks for identifying it!