global cargo config

home/development/rust.nix

@@ -1,4 +1,48 @@
 {pkgs, ...}: {
   # home.packages = with pkgs; [
   # ];
+
+  home.file.".cargo/config.toml".text = ''
+[unstable]
+codegen-backend = true
+
+[profile.dev]
+codegen-backend = "cranelift"
+
+[profile.dev.package."*"]
+codegen-backend = "llvm"
+# Consider compiling deps with cranelift if you want cold-compilation to be faster
+# codegen-backend = "cranelift"
+
+# cranelift is `panic = abort`, so you need to compile with llvm to get `#[should_panic]` working
+[profile.test.package."*"]
+codegen-backend = "llvm"
+
+# Disable cranelift for release profile
+[profile.release]
+codegen-backend = "llvm"
+
+# cranelift cannot build wasm32-unknown-unknown out of the box
+[profile.web]
+codegen-backend = "llvm"
+
+[build]
+# Using a global target dir allows all projects to share incremental compilation results,
+# vastly speeding up cold-compilation of new projects.
+target-dir = "/var/code/rust/.cargo/global-target"
+
+[target.x86_64-unknown-linux-gnu]
+linker = "clang"
+rustflags = [
+    "-Clink-arg=--ld-path=mold",
+    # Compile faster
+    "-Zshare-generics=y",
+    "-Zthreads=12",
+]
+rustdocflags = [
+    # Compile faster
+    "-Zshare-generics=y",
+    "-Zthreads=12",
+]
+'';
 }