Improve build procedure and instructions (#28)

Fixes issues pointed out in #27:
* spirv_tools-sys was build in non-test profiles
* By default ZLUDA dll has a wrong name
* We relied on third-party OpenCL installation on Windows
* We encouraged building debug configuration
* We didn't provide build information for developers (cmake, python, submodules)

1 files changed, 16 insertions, 23 deletions

diff --git a/zluda/build.rs b/zluda/build.rs
index 3b8999f..94c2c6f 100644
--- a/zluda/build.rs
+++ b/zluda/build.rs
@@ -1,27 +1,20 @@
+use env::VarError;

+use std::{env, path::PathBuf};

+

 // HACK ALERT

-// This buidl script has been copy-pasted from cl-sys to avoid CUDA libraries

-// overriding path to OpenCL

+// This is a temporary hack to to make sure that linker does not pick up

+// NVIDIA OpenCL .lib using paths injected by cl-sys

 

- fn main() {

+fn main() -> Result<(), VarError> {

     if cfg!(windows) {

-        let known_sdk = [

-            // E.g. "c:\Program Files (x86)\Intel\OpenCL SDK\lib\x86\"

-            ("INTELOCLSDKROOT", "x64", "x86"),

-            // E.g. "c:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v8.0\lib\Win32\"

-            ("CUDA_PATH", "x64", "Win32"),

-            // E.g. "C:\Program Files (x86)\AMD APP SDK\3.0\lib\x86\"

-            ("AMDAPPSDKROOT", "x86_64", "x86"),            

-        ];

-

-        for info in known_sdk.iter() {

-            if let Ok(sdk) = std::env::var(info.0) {

-                let mut path = std::path::PathBuf::from(sdk);

-                path.push("lib");

-                path.push(if cfg!(target_arch="x86_64") { info.1 } else { info.2 });

-                println!("cargo:rustc-link-search=native={}", path.display());

-            }

-        }

-

-        println!("cargo:rustc-link-search=native=C:\\Program Files (x86)\\OCL_SDK_Light\\lib\\x86_64");        

+        let env = env::var("CARGO_CFG_TARGET_ENV")?;

+        if env == "msvc" {

+            let mut path = PathBuf::from(env::var("CARGO_MANIFEST_DIR")?);

+            path.push("lib");

+            println!("cargo:rustc-link-search=native={}", path.display());

+        } else {

+            println!("cargo:rustc-link-search=native=C:\\Windows\\System32");

+        };

     }

-}
\ No newline at end of file
+    Ok(())

+}