1 // Copyright 2019 TiKV Project Authors. Licensed under Apache-2.0.
3 use std::env;
4 use std::env::VarError;
10 // Platform-Specific Instructions: Regenerating gRPC Bindings for Windows
12 // If you need to manually update the 'android/grpc-bindings.rs' file on Windows,
16 //    - Download and install the pre-built LLVM binaries from:
18 //    - Update the `LIBCLANG_PATH` environment variable to point to the 'bin'
22 //    - Set the `GRPCIO_SYS_GRPC_INCLUDE_PATH` environment variable to the
26 //    - Run the following Cargo command to regenerate the bindings:
27 //      `cargo build --features _gen-bindings`
29 include!("../link-deps.rs");
31 fn get_env(name: &str) -> Option<String> {  in get_env()
32     println!("cargo:rerun-if-env-changed={name}");  in get_env()
33     match env::var(name) {  in get_env()
37             panic!("unrecognize env var of {name}: {:?}", s.to_string_lossy());  in get_env()
42 // Generate the bindings to grpc C-core.
43 // Try to disable the generation of platform-related bindings.
45     feature = "_gen-bindings",
52     // create a config to generate binding file  in bindgen_grpc()
55         config = config.clang_arg("-DGRPC_SYS_SECURE");  in bindgen_grpc()
59         config = config.clang_arg("-D _WIN32_WINNT=0x600");  in bindgen_grpc()
84     println!("cargo:rerun-if-env-changed=TEST_BIND");  in bindgen_grpc()
85     let gen_tests = env::var("TEST_BIND").map_or(false, |s| s == "1");  in bindgen_grpc()
89         .clang_arg("-xc++")  in bindgen_grpc()
90         .clang_arg("-I./grpc/include")  in bindgen_grpc()
91         .clang_arg("-std=c++11")  in bindgen_grpc()
119     cfg.generate()  in bindgen_grpc()
120         .expect("Unable to generate grpc bindings")  in bindgen_grpc()
126 // need to be updated by default unless the _gen-bindings feature is specified.
128     let target = env::var("TARGET").unwrap();  in config_binding_path()
130         "x86_64-unknown-linux-gnu"  in config_binding_path()
131         | "x86_64-unknown-linux-musl"  in config_binding_path()
132         | "aarch64-unknown-linux-musl"  in config_binding_path()
133         | "aarch64-unknown-linux-gnu"  in config_binding_path()
134         | "x86_64-apple-darwin"  in config_binding_path()
135         | "aarch64-apple-darwin" => {  in config_binding_path()
136             // Cargo treats nonexistent files changed, so we only emit the rerun-if-changed  in config_binding_path()
137             // directive when we expect the target-specific pre-generated binding file to be  in config_binding_path()
139             println!("cargo:rerun-if-changed=bindings/bindings.rs");  in config_binding_path()
141             PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())  in config_binding_path()
145         _ => PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())  in config_binding_path()
147             .join("grpc-bindings.rs"),  in config_binding_path()
149     #[cfg(feature = "_gen-bindings")]  in config_binding_path()
164         "cargo:rustc-env=BINDING_PATH={}",  in config_binding_path()
170     println!("cargo:rerun-if-changed=grpc_wrap.cc");  in main()
171     println!("cargo:rerun-if-changed=grpc");  in main()