[Arch Linux] "could not find native static library SPIRV-Tools-opt, perhaps an -L flag is missing?"

[mitchmindtree]

This error started occurring on my Arch Linux system after doing a fresh build of nannou yesterday which relies on this crate via vulkano_shaders.

This seems related to #58, though the patch posted at #59 seems to make no difference in my case. @Abendstolz were you able to get shaderc building (not just type-checking) with the patch at #59? cargo check works OK for me, but cargo build fails with the title error.

Here is the full output I get when attempting to build shaderc-rs master branch today:

[mindtree@mindtree shaderc-rs]$ cargo build
   Compiling cc v1.0.38
   Compiling libc v0.2.60
   Compiling cmake v0.1.40
   Compiling shaderc-sys v0.6.0 (/home/mindtree/programming/rust/shaderc-rs/shaderc-sys)
warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
warning: Found SPIRV.  Linking libSPIRV & libglslang
error: could not find native static library `SPIRV-Tools-opt`, perhaps an -L flag is missing?

error: aborting due to previous error

The following warnings were emitted during compilation:

warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
warning: Found SPIRV.  Linking libSPIRV & libglslang

error: Could not compile `shaderc-sys`.

Here is the full output building the patch at #59 with unrelated deprecated item warnings omitted:

[mindtree@mindtree shaderc-rs]$ cargo build                                                                                                   
   Compiling cc v1.0.38                                                                                                                       
   Compiling libc v0.2.60                                              
   Compiling cmake v0.1.40                                                                                                                    
   Compiling shaderc-sys v0.5.0 (/home/mindtree/programming/rust/shaderc-rs/shaderc-sys)                                                      
warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
warning: Found SPIRV.  Linking libSPIRV & libglslang

# ... Deprecated item warnings ...

error: could not find native static library `SPIRV-Tools-opt`, perhaps an -L flag is missing?

error: aborting due to previous error

The following warnings were emitted during compilation:

warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
warning: Found SPIRV.  Linking libSPIRV & libglslang

error: Could not compile `shaderc-sys`.

I cargo cleaned and cargo updated before each to ensure no old broken artifacts were being used. Using the "build-from-source" feature seems to make no difference to the output in either case.

Here are the related libSPIRV* libraries I can find in my /usr/lib directory:

-rw-r--r--   1 root root 1010K Jul 19 19:46 libSPIRV.a                                                                                        
-rwxr-xr-x   1 root root  526K Jul 19 19:46 libSPIRV.so                                                                                       
lrwxrwxrwx   1 root root    11 Jul 19 19:46 libSPIRV.so.0 -> libSPIRV.so                                                                      
-rwxr-xr-x   1 root root   98K Jul 19 18:38 libSPIRV-Tools-link.so                                                                            
-rwxr-xr-x   1 root root  2.6M Jul 19 18:38 libSPIRV-Tools-opt.so                                                                             
-rwxr-xr-x   1 root root  178K Jul 19 18:38 libSPIRV-Tools-reduce.so                                                                          
-rwxr-xr-x   1 root root  1.1M Jul 19 18:38 libSPIRV-Tools-shared.so                                                                          
-rwxr-xr-x   1 root root  1.2M Jul 19 18:38 libSPIRV-Tools.so                                                                                 

Any advice on solutions/workarounds would be greatly appreciated!

[Abendstolz]

Hey @mitchmindtree,

as I wrote in #58 I've fixed it on my machine with:

[dependencies]
... 
# Fixing broken detection of glslang on my arch machine, see: https://github.com/google/shaderc-rs/pull/59
shaderc = "0.5.1"
shaderc-sys = "0.5.1"

[features]
shaderc_fix = ["shaderc/build-from-source"]

[mitchmindtree]

Thanks, I just wanted to clarify as the same patch is not working on my machine. Hmmmm.

[Abendstolz]

Thanks, I just wanted to clarify as the same patch is not working on my machine. Hmmmm.

I'm sorry, I am curious by nature: How do you try to build? You write about using the build-from-source feature, but how do you pass that to rustc?

I only could get this to work with re-exposing it as another feature, so I have to run:

cargo r --release --features=shaderc_fix

I just did a cargo clean and cargo update to verify this still works and yes it does, it just takes forever re-compiling shaderc-sys from source

edit: One more note, I am using the latest stable rust-compiler, which is 1.36.0 as of writing this

[mitchmindtree]

I have tried via specifying the feature in the Cargo.toml of multiple downstream projects and I have also tried while attempting to build local copies of both shaderc-rs and shaderc-sys, and I have tried both with and without the patch. I have also tried rebasing the patch onto master to no avail.

I have also tried uninstalling and re-installing the shaderc pacman package.

[mindtree@mindtree shaderc-rs]$ rustc --version
rustc 1.35.0 (3c235d560 2019-05-20)
[mindtree@mindtree shaderc-rs]$ cargo --version
cargo 1.35.0 (6f3e9c367 2019-04-04)
[mindtree@mindtree shaderc-rs]$ rustup which rustc
/home/mindtree/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc

[mitchmindtree]

OK! It appears I failed to clone the repo recursively which caused my build-from-souce attempts to fail. After git submodule update --init --recursive and building shaderc-sys with the build-from-source feature I have managed to get the voidlinux patch branch working. Going to close this in favour of #58 and #59.