build.rs: support libc++ Linux distros

[Ella-0]

Some Linux distros use LLVM libc++ instead of GNU libstdc++. Would support for this in build.rs be possible?

[antiagainst]

Hi @Ella-0, thanks for the request. But unfortunately I at the moment won't have the bandwidth to work on this. Patches welcome!! :)

[Ella-0]

The following fixes it. I would create a PR but I do not want to sign the CLA.

diff --git a/shaderc-sys/build/build.rs b/shaderc-sys/build/build.rs
index 946309e..50f76ee 100644
--- a/shaderc-sys/build/build.rs
+++ b/shaderc-sys/build/build.rs
@@ -253,9 +253,13 @@ fn main() {
         } {
             match (target_os.as_str(), target_env.as_str()) {
                 ("linux", _) => {
+                    use std::process::Command;
                     println!("cargo:rustc-link-search=native={}", search_dir_str);
                     println!("cargo:rustc-link-lib={}={}", lib_kind, lib_name);
-                    println!("cargo:rustc-link-lib=dylib=stdc++");
+                    match Command::new("cc").arg("-nostdlib").arg("-lstdc++").output() {
+                        Ok(_) => println!("cargo:rustc-link-lib=dylib=stdc++"),
+                        Err(_) => println!("cargo:rustc-link-lib=dylib=c++"),
+                    }
                     return;
                 }
                 ("windows", "msvc") => {

[xbjfk]

I would recommend the link-cplusplus crate, which seems to be the defacto way of solving this issue in Rust crates. It's feature flags make it easy for end users to override, or, using overriding it in Cargo.toml