feat: use fat lto

.gitignore

@@ -5,6 +5,7 @@ back/target/
 **/Cargo.lock
 .cache/
 compile_commands.json
+after/
 
 # MacOS Cache
 .DS_Store

back/Cargo.toml

@@ -11,3 +11,7 @@ cxx = "1.0"
 cxx-build = "1.0"
 [lib]
 crate-type = ["staticlib"]
+
+
+[profile.release]
+lto = true

back/src/lib.rs

@@ -1,3 +1,4 @@
+#![allow(dead_code)]
 use std::fmt;
 
 #[cxx::bridge]

readme.md

@@ -9,9 +9,6 @@ There are some tools I have used.
 
 # Run
 ```shell
-cd back
-cargo build --release
-cd ..
 xmake 
 xmake run
 ```
@@ -21,4 +18,5 @@ xmake run
 - [x] Dockerfile
 # Credits
 * This project is almost a fork of [cxx-cmake-example](https://github.com/XiangpengHao/cxx-cmake-example) .
-* [lto](https://blog.llvm.org/2019/09/closing-gap-cross-language-lto-between.html) 
+* explain the steps of [lto](https://blog.llvm.org/2019/09/closing-gap-cross-language-lto-between.html) 
+* [rustc lto plugin](https://doc.rust-lang.org/rustc/linker-plugin-lto.html)

xmake.lua

@@ -1,18 +1,30 @@
-add_rules("mode.debug", "mode.release")
+add_rules("mode.release")
 
-target("cm")
+local rust_backend = "back"
+target("xm")
+before_build(function(target)
+	os.cd("back")
+	os.exec("cargo build --release --verbose")
+	os.cd("..")
+	os.mkdir("after", "after/include")
+	os.cp("back/target/cxxbridge/back/src/*.h", "after/include/")
+	os.cp("back/target/cxxbridge/back/src/*.cc", "after/")
+	os.cp("back/target/cxxbridge/rust/*.h", "after/include/")
+end)
 set_toolchains("clang-13")
 set_languages("cxx17")
 set_kind("binary")
+
 add_files("src/*.cpp")
-add_includedirs("back/target/cxxbridge/back/src/")
-add_includedirs("include/")
-add_files("back/target/cxxbridge/back/src/lib.rs.cc")
-add_links("back")
+add_includedirs("src/include")
+
+add_files("after/lib.rs.cc")
+add_includedirs("after/include")
+
 add_links("stdc++")
+add_linkdirs(rust_backend .. "/target/release/")
+add_links(rust_backend)
+
 add_cxflags("-flto=thin")
--- add_links("pthread")
--- add_links("dl")
-add_linkdirs("back/target/release/")
-add_ldflags("-fuse-ld=mold")
 add_ldflags("-flto=thin")
+add_ldflags("-fuse-ld=mold")