From 81a72d576278025ec3d84aff36829003ab0af18b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Wed, 22 Nov 2023 11:57:08 +0200
Subject: [PATCH] build-llvm: Use a faster linker for native building, if
 available

Use lld or gold, if available - they are significantly faster than
ld.bfd on Linux.
---
 build-llvm.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/build-llvm.sh b/build-llvm.sh
index 6962d59..47a4f1d 100755
--- a/build-llvm.sh
+++ b/build-llvm.sh
@@ -221,6 +221,15 @@ elif [ -n "$STAGE2" ]; then
     CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_C_COMPILER=clang"
     CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CXX_COMPILER=clang++"
     CMAKEFLAGS="$CMAKEFLAGS -DLLVM_USE_LINKER=lld"
+else
+    # Native compilation with the system default compiler.
+
+    # Use a faster linker, if available.
+    if command -v ld.lld >/dev/null; then
+        CMAKEFLAGS="$CMAKEFLAGS -DLLVM_USE_LINKER=lld"
+    elif command -v ld.gold >/dev/null; then
+        CMAKEFLAGS="$CMAKEFLAGS -DLLVM_USE_LINKER=gold"
+    fi
 fi
 
 if [ -n "$TARGET_WINDOWS" ]; then