Add ccache, remove linking with STL

platform/rust/build.rs

@@ -9,25 +9,23 @@ fn main() {
         .to_path_buf();
 
     let mut cmake_cfg = cmake::Config::new(&project_root);
+
     cmake_cfg
-        .define("MLN_WITH_CORE_ONLY", "ON")
         .generator("Ninja")
+        .define("CMAKE_C_COMPILER_LAUNCHER", "ccache")
+        .define("CMAKE_CXX_COMPILER_LAUNCHER", "ccache")
+        .define("MLN_WITH_CORE_ONLY", "ON")
         .build_target("mbgl-core");
 
     let build_output = cmake_cfg.build();
 
-    // The library is in build_output/build/libmbgl-core.a
     let lib_dir = build_output.join("build");
     println!("cargo:rustc-link-search=native={}", lib_dir.display());
     println!("cargo:rustc-link-lib=static=mbgl-core");
 
-    // If on macOS/Clang:
-    println!("cargo:rustc-link-lib=c++");
-    // If on Linux/GCC:
-    // println!("cargo:rustc-link-lib=stdc++");
-
+    // cxx build
     let mut cxx = cxx_build::bridge("src/lib.rs");
     cxx.include(project_root.join("include"))
-        .flag_if_supported("-std=c++20")
-        .compile("maplibre_rust_bindings");
+       .flag_if_supported("-std=c++20")
+       .compile("maplibre_rust_bindings");
 }