chore(build): use mold linker instead of lld if available

README.md

@@ -8,7 +8,7 @@ To compile, a stable Rust compiler and [just](https://github.com/casey/just) are
 
 - cargo
 - just
-- lld
+- mold
 
 Some C libraries are also required for font support at the moment.
 

debian/control

@@ -4,18 +4,18 @@ Priority: optional
 Maintainer: Michael Murphy <mmstick@pm.me>
 Build-Depends:
     debhelper-compat (=13),
-    just (>= 1.13.0),
-    rust-all,
     cmake,
+    just (>= 1.13.0),
     libexpat1-dev,
     libfontconfig-dev,
     libfreetype-dev,
-    lld,
+    libinput-dev,
-    libwayland-dev,
-    pkg-config,
-    libxkbcommon-dev,
     libudev-dev,
-    libinput-dev
+    libwayland-dev,
+    libxkbcommon-dev,
+    mold,
+    pkg-config,
+    rust-all,
 Standards-Version: 4.6.2
 Homepage: https://github.com/pop-os/cosmic-settings
 

justfile

@@ -1,21 +1,21 @@
 name := 'cosmic-settings'
 appid := 'com.system76.CosmicSettings'
 
-# Use lld linker if available
+# Use mold linker if clang and mold exists.
-ld-args := if `which lld || true` != '' {
+clang-path := `which clang || true`
-    '-C link-arg=-fuse-ld=lld -C link-arg=-Wl,--build-id=sha1'
+mold-path := `which mold || true`
+
+linker-arg := if clang-path != '' {
+    if mold-path != '' {
+        '-C linker=' + clang-path + ' -C link-arg=--ld-path=' + mold-path + ' '
+    } else {
+        ''
+    }
 } else {
     ''
 }
 
-# Use the x86-64-v2 target by default on x86-64 systems.
+export RUSTFLAGS := linker-arg + env_var_or_default('RUSTFLAGS', '')
-target-cpu := if arch() == 'x86_64' { 'x86-64-v2' } else { '' }
-
-export RUSTFLAGS := if target-cpu != '' {
-    ld-args + ' -C target-cpu=' + target-cpu + ' ' + env_var_or_default('RUSTFLAGS', '')
-} else {
-    ld-args + ' ' + env_var_or_default('RUSTFLAGS', '')
-}
 
 rootdir := ''
 prefix := '/usr'