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build.rs
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build.rs
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// $env:LIBCLANG_PATH="C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\Llvm\x64\bin\libclang.dll"
extern crate bindgen;
use cmake;
use std::env;
use std::path::Path;
use std::path::PathBuf;
use std::fs;
use std::process;
use regex::Regex;
fn get_cmake_version() -> (i32, i32) {
let out = process::Command::new("cmake")
.args(&["--version"])
.output()
.expect("Failed to run cmake --version");
let str_out = String::from_utf8(out.stdout).expect("Could not convert response to string");
let lines: Vec<&str> = str_out.split('\n').collect();
let re = Regex::new(r"cmake version (\d*)\.(\d*)").expect("Could not create regex");
let captures = re.captures(lines[0]).expect("Could not find version in string");
let major = captures[1].parse::<i32>().expect("Could not convert major version to integer");
let minor = captures[2].parse::<i32>().expect("Could not convert minor version to integer");
(major, minor)
}
fn do_hacks(family: &String) {
if family.eq("POSIX") {
let (major, minor) = get_cmake_version();
if major >= 3 && minor >= 15 {
return;
}
let filename = "./azure-sdk-for-c/CMakeLists.txt";
let new_filename = "./azure-sdk-for-c/CMakeLists_new.txt";
let old_filename = "./azure-sdk-for-c/CMakeLists_old.txt";
if Path::new(old_filename).exists() {
return;
}
let mut contents = fs::read_to_string(filename)
.expect("Couldn't read file");
if let Some(loc) = contents.find("cmake_policy(SET CMP0091 NEW)") {
contents.insert(loc, '#');
} else {
println!("Could not find policy");
process::exit(4);
}
fs::write(new_filename, contents)
.expect("Could not write output file");
fs::rename(filename, old_filename)
.expect("Could not rename original file");
fs::rename(new_filename, filename)
.expect("Could not rename new file");
}
}
fn main() {
// Builds the azure iot sdk, installing it
// into $OUT_DIR
use cmake::Config;
let family: String;
// Here because once again there is not a make install step in the Linux build
let no_build_target: bool;
if env::var("CARGO_CFG_TARGET_FAMILY").unwrap().eq("windows") {
family = "WIN32".to_string();
no_build_target = false;
} else {
family = "POSIX".to_string();
no_build_target = true;
}
do_hacks(&family);
let root = env::var("CARGO_MANIFEST_DIR").unwrap();
let out_dir = env::var("OUT_DIR").unwrap();
let profile: String;
if env::var("PROFILE").unwrap().eq("release") {
profile = "Release".to_string();
} else {
profile = "Debug".to_string();
}
let _dst = Config::new("azure-sdk-for-c")
.no_build_target(no_build_target)
.build_target("ALL_BUILD")
.define("AZ_PLATFORM_IMPL", &family)
.build();
let root_path: PathBuf = [
&out_dir,
&"build".to_string(),
&"sdk".to_string(),
&"src".to_string(),
&"azure".to_string(),
]
.iter()
.collect();
let mut core_path: PathBuf = root_path.clone();
core_path.push("core");
let mut iot_path: PathBuf = root_path.clone();
iot_path.push("iot");
let mut platform_path: PathBuf = root_path.clone();
platform_path.push("platform");
if family == "WIN32" {
core_path.push(&profile);
iot_path.push(&profile);
platform_path.push(&profile);
}
println!(
"cargo:rustc-link-search=native={}",
core_path.to_str().unwrap()
);
println!(
"cargo:rustc-link-search=native={}",
iot_path.to_str().unwrap()
);
println!(
"cargo:rustc-link-search=native={}",
platform_path.to_str().unwrap()
);
// Tell cargo to tell rustc to link the azureiot libraries.
println!("cargo:rustc-link-lib=az_iot_hub");
println!("cargo:rustc-link-lib=az_iot_common");
println!("cargo:rustc-link-lib=az_core");
println!("cargo:rustc-link-lib=az_iot_provisioning");
println!("cargo:rustc-link-lib=az_nohttp");
println!("cargo:rustc-link-lib=az_{}", family.to_lowercase());
// Tell cargo to invalidate the built crate whenever the wrapper changes
println!("cargo:rerun-if-changed=wrapper.h");
let mut clang_args: Vec<String> = Vec::new();
// Add required clang args
clang_args.push(format!("-I{}/azure-sdk-for-c/sdk/inc", root));
// The bindgen::Builder is the main entry point
// to bindgen, and lets you build up options for
// the resulting bindings.
let bindings = bindgen::Builder::default()
// The input header we would like to generate
// bindings for.
.header("wrapper.h")
// Add additional clang arguments - see clangargs_sample.txt
.clang_args(clang_args)
// Tell cargo to invalidate the built crate whenever any of the
// included header files changed.
.parse_callbacks(Box::new(bindgen::CargoCallbacks))
// Finish the builder and generate the bindings.
.generate()
// Unwrap the Result and panic on failure.
.expect("Unable to generate bindings");
// Write the bindings to the $OUT_DIR/bindings.rs file.
let mut path2 = PathBuf::from(&out_dir);
path2.push("bindings.rs");
bindings
.write_to_file(path2)
.expect("Couldn't write bindings!");
}