chore: use lld linker by default

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: install system dependencies
-        run: sudo apt-get update && sudo apt-get install cmake libexpat1-dev libfontconfig-dev libfreetype-dev pkg-config
+        run: sudo apt-get update && sudo apt-get install lld cmake libexpat1-dev libfontconfig-dev libfreetype-dev pkg-config
       - uses: actions/checkout@v3
       - name: install toolchain
         run: rustup show
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: install system dependencies
-        run: sudo apt-get update && sudo apt-get install cmake libexpat1-dev libfontconfig-dev libfreetype-dev pkg-config
+        run: sudo apt-get update && sudo apt-get install lld cmake libexpat1-dev libfontconfig-dev libfreetype-dev pkg-config
       - uses: actions/checkout@v3
       - name: install toolchain
         run: rustup show

README.md

@@ -10,6 +10,7 @@ To compile, a stable Rust compiler and [just](https://github.com/casey/just) are
 
 - cargo
 - just
+- lld
 
 Some C libraries are also required for font support at the moment.
 

debian/control

@@ -10,6 +10,7 @@ Build-Depends:
     libexpat1-dev,
     libfontconfig-dev,
     libfreetype-dev,
+    lld,
     pkg-config,
 Standards-Version: 4.6.2
 Homepage: https://github.com/pop-os/cosmic-settings

justfile

@@ -3,10 +3,12 @@ appid := 'com.system76.CosmicSettings'
 
 x86-64-target := 'x86-64-v2'
 
+linker := '-C link-arg=-fuse-ld=lld'
+
 export RUSTFLAGS := if arch() == 'x86_64' {
-    '-C target-cpu=' + x86-64-target
+    linker + ' -C target-cpu=' + x86-64-target
 } else {
-    ''
+    linker
 }
 
 rootdir := ''