feat: support rust crate building

src/core/CMakeLists.txt

@@ -38,8 +38,10 @@ target_link_libraries(klotski_core PUBLIC phmap::phmap)
 add_library(klotski::core ALIAS klotski_core)
 
 # TODO: just for dev testing
-add_executable(klotski_core_bin main.cc)
-target_link_libraries(klotski_core_bin PRIVATE klotski_core)
+if (KLSK_DEV_MODE)
+  add_executable(klotski_core_bin main.cc)
+  target_link_libraries(klotski_core_bin PRIVATE klotski_core)
+endif()
 
 if (KLSK_ENABLE_BENCHMARK)
   set(KLSK_BENCHMARK_OPTS -fno-rtti -fno-exceptions -fno-access-control)

src/core_ffi/CMakeLists.txt

@@ -15,6 +15,9 @@ if (KLSK_PYTHON_FFI)
 endif()
 
 if (KLSK_RUST_FFI)
+  if (CARGO_BUILD)
+    install(TARGETS klotski_core DESTINATION .)
+  else()
     # just for IDE highlight
     add_library(klotski_rust
         rust_ffi/adapter/common_code.cc
@@ -23,4 +26,5 @@ if (KLSK_RUST_FFI)
     target_include_directories(klotski_rust PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
     target_include_directories(klotski_rust PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/rust_ffi/target/cxxbridge)
     target_link_libraries(klotski_rust PRIVATE klotski_core)
+  endif()
 endif()

src/core_ffi/rust_ffi/Cargo.lock

@@ -8,6 +8,15 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "907d8581360765417f8f2e0e7d602733bbed60156b4465b7617243689ef9b83d"
 
+[[package]]
+name = "cmake"
+version = "0.1.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb1e43aa7fd152b1f968787f7dbcdeb306d1867ff373c69955211876c053f91a"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "codespan-reporting"
 version = "0.11.1"
@@ -66,6 +75,7 @@ dependencies = [
 name = "klotski"
 version = "0.0.1"
 dependencies = [
+ "cmake",
  "cxx",
  "cxx-build",
 ]

src/core_ffi/rust_ffi/Cargo.toml

@@ -9,4 +9,5 @@ edition = "2021"
 cxx = "1.0.124"
 
 [build-dependencies]
+cmake = "0.1"
 cxx-build = "1.0.124"

src/core_ffi/rust_ffi/build.rs

@@ -1,3 +1,5 @@
+extern crate cmake;
+
 use cxx_build::CFG;
 
 // NOTE: add `CC=clang-20 CXX=clang++-20 CXXFLAGS="-stdlib=libc++"` for cargo command
@@ -5,29 +7,31 @@ use cxx_build::CFG;
 
 // NOTE: also, `RUSTFLAGS="-C linker=clang-20"` should be add to cargo env for using lld
 
+// NOTE: add `CC=clang-20 CXX=clang++-20 CXXFLAGS="-stdlib=libc++" RUSTFLAGS="-C linker=clang-20 -C link-arg=-fuse-ld=lld-20 -C link-arg=-stdlib=libc++"` for using llvm toolchain
+
 fn main() {
-    CFG.include_prefix = "rust_ffi";
+    let dst = cmake::Config::new("klotski")
+        // .build_target("klotski_core")
+        .define("CARGO_BUILD:BOOL", "ON")
+        .define("KLSK_ENABLE_TESTING:BOOL", "OFF")
+        .define("KLSK_ENABLE_BENCHMARK:BOOL", "OFF")
+        .define("KLSK_C_FFI:BOOL", "OFF")
+        .define("KLSK_PYTHON_FFI:BOOL", "OFF")
+        .build();
 
-    // std::env::set_var("CC", "clang-20");
-    // std::env::set_var("CXX", "clang++-20");
+    CFG.include_prefix = "rust_ffi";
 
     cxx_build::bridge("src/common_code.rs")
         .file("adapter/common_code.cc")
         .flag("-std=c++23")
         .flag("-fno-rtti")
         .flag("-fno-exceptions")
-        // .flag("-stdlib=libc++")
-        .include("../../core")
-        // .cpp_set_stdlib("c++")
-        // .cpp_link_stdlib("c++")
+        .include("klotski/src/core")
         .compile("klotski");
 
-    println!("cargo:rustc-link-search=native=../../../cmake-build-release/src/core");
+    println!("cargo:rustc-link-search=native={}", dst.display());
     println!("cargo:rustc-link-lib=static=klotski_core");
 
-    println!("cargo:rustc-link-arg=-fuse-ld=lld-20");
-    println!("cargo:rustc-link-arg=-stdlib=libc++");
-
     println!("cargo:rerun-if-changed=adapter/common_code.cc");
     println!("cargo:rerun-if-changed=src/common_code.rs");
 }

src/core_ffi/rust_ffi/klotski/CMakeLists.txt

@@ -0,0 +1 @@
+../../../../CMakeLists.txt

src/core_ffi/rust_ffi/klotski/src/CMakeLists.txt

@@ -0,0 +1 @@
+../../../../CMakeLists.txt

src/core_ffi/rust_ffi/klotski/src/core

@@ -0,0 +1 @@
+../../../../core

src/core_ffi/rust_ffi/klotski/src/core_ffi/CMakeLists.txt

@@ -0,0 +1 @@
+../../../../CMakeLists.txt

src/core_ffi/rust_ffi/klotski/third_party/ThirdParty.cmake

@@ -0,0 +1 @@
+../../../../../third_party/ThirdParty.cmake

src/core_ffi/rust_ffi/klotski/third_party/parallel-hashmap

@@ -0,0 +1 @@
+../../../../../third_party/parallel-hashmap