chore: add notes for Windows users

README.md

@@ -53,6 +53,9 @@ and [Apple Accelerate](https://developer.apple.com/documentation/accelerate).
 
 The installation of CMake is required to compile the library.
 
+Additional notes for Windows:
+it is necessary to add `RUSTFLAGS=-C target-feature=+crt-static` to the environment variables for compilation.
+
 ## Model Conversion for CTranslate2
 
 To use model files with CTranslate2, they must first be converted.

build.rs

@@ -43,6 +43,11 @@ fn main() {
         .define("WITH_MKL", "OFF")
         .define("OPENMP_RUNTIME", "NONE");
     if cfg!(target_os = "windows") {
+        let rustflags = env::var("RUSTFLAGS").unwrap_or_default();
+        if !rustflags.contains("target-feature=+crt-static") {
+            println!("cargo:warning=For Windows compilation, set `RUSTFLAGS=-C target-feature=+crt-static`.");
+        }
+
         println!("cargo::rustc-link-arg=/FORCE:MULTIPLE");
         cmake.profile("Release");
     }