musikr: eliminate need for libc++_shared

musikr/build.gradle

@@ -56,52 +56,6 @@ cargo {
     profile = "release"
 }
 
-tasks.whenTaskAdded { task ->
-    if (task.name == 'mergeDebugJniLibFolders' || task.name == 'mergeReleaseJniLibFolders') {
-        task.dependsOn 'cargoBuild'
-    }
-    for (target in cargo.targets) {
-        if (task.name == "cargoBuild${target.capitalize()}") {
-            task.dependsOn "copy_libc++_shared${target.capitalize()}"
-        }
-    }
-}
-
-for (target in cargo.targets) {
-    tasks.register("copy_libc++_shared${target.capitalize()}", Copy) {
-        def ndkDir = android.ndkDirectory
-        // hostTag, abi and archTriple from: https://developer.android.com/ndk/guides/other_build_systems
-
-        def hostTag
-        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
-            if (Os.isArch("x86_64") || Os.isArch("amd64")) {
-                hostTag = "windows-x86_64"
-            } else {
-                hostTag = "windows"
-            }
-        } else if (Os.isFamily(Os.FAMILY_MAC)) {
-            hostTag = "darwin-x86_64"
-        } else {
-            hostTag = "linux-x86_64"
-        }
-
-        def (abi, archTriple) = [
-                arm: ['armeabi-v7a', 'arm-linux-androideabi'],
-                arm64: ['arm64-v8a', 'aarch64-linux-android'],
-                x86: ['x86', 'i686-linux-android'],
-                x86_64: ['x86_64', 'x86_64-linux-android'],
-        ][target]
-
-        def from_path = "$ndkDir/toolchains/llvm/prebuilt/$hostTag/sysroot/usr/lib/$archTriple/libc++_shared.so"
-        def into_path = layout.buildDirectory.dir("rustJniLibs/android/$abi")
-
-        assert file(from_path).exists()
-
-        from from_path
-        into into_path
-    }
-}
-
 dependencies {
     // Kotlin
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"

musikr/src/main/jni/Cargo.lock

@@ -196,6 +196,7 @@ dependencies = [
  "cxx",
  "cxx-build",
  "jni",
+ "link-cplusplus",
 ]
 
 [[package]]

musikr/src/main/jni/Cargo.toml

@@ -8,8 +8,14 @@ name = "metadatajni"
 crate-type = ["cdylib"]
 
 [dependencies]
+link-cplusplus = { version = "1.0.9", features = ["nothing"] }
 cxx = { version = "1.0.137", default-features = false, features = ["alloc"] }
 jni = { version = "0.21.1", default-features = false }
 
 [build-dependencies]
 cxx-build = "1.0.137"
+
+[profile.release]
+lto = true
+codegen-units = 1
+panic = "abort"

musikr/src/main/jni/build.rs

@@ -4,6 +4,11 @@ use std::process::Command;
 use cxx_build;
 
 fn main() {
+    // List all envs
+    for (key, value) in env::vars() {
+        println!("{}: {}", key, value);
+    }
+
     let working_dir = env::current_dir().expect("Failed to get current working directory");
     let target = env::var("TARGET").expect("TARGET env var not set");
     let working_dir = Path::new(&working_dir);
@@ -105,18 +110,22 @@ fn main() {
 
     println!("cargo:rustc-link-search=native={}/lib", arch_pkg_dir.display());
     println!("cargo:rustc-link-lib=static=tag");
+    // println!("cargo:rustc-link-lib=c++_static");
     
     // Build the shim and cxx bridge together
-    cxx_build::bridge("src/taglib/ffi.rs")
-        .file("shim/iostream_shim.cpp")
+    let mut builder = cxx_build::bridge("src/taglib/ffi.rs");
+    builder.file("shim/iostream_shim.cpp")
         .file("shim/file_shim.cpp")
         .file("shim/tk_shim.cpp")
         .include(format!("taglib/pkg/{}/include", arch))
         .include("shim")
         .include(".")  // Add the current directory to include path
-        .flag_if_supported("-std=c++14")
-        .cpp_link_stdlib("c++_shared")  // Use shared C++ runtime for Android compatibility
-        .compile("taglib_cxx_bindings");
+        .flag_if_supported("-std=c++14");
+
+    if is_android {
+        builder.cpp_link_stdlib("c++_static");  // Use shared C++ runtime for Android compatibility
+    }
+    builder.compile("taglib_cxx_bindings");
 
     // Rebuild if shim files change
     println!("cargo:rerun-if-changed=shim/iostream_shim.hpp");