From 811a1b144a03ab80ee86fcece764fa47f055909d Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Tue, 9 Apr 2024 06:41:52 +0200
Subject: [PATCH] cling: fix runtime error on darwin

---
 pkgs/development/interpreters/cling/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/interpreters/cling/default.nix b/pkgs/development/interpreters/cling/default.nix
index a53335fc4de6..a5a3de81bd5a 100644
--- a/pkgs/development/interpreters/cling/default.nix
+++ b/pkgs/development/interpreters/cling/default.nix
@@ -27,7 +27,7 @@
 
 # Build with libc++ (LLVM) rather than stdlibc++ (GCC).
 # This is experimental and not all features work.
-, useLLVMLibcxx ? false
+, useLLVMLibcxx ? clangStdenv.isDarwin
 }:
 
 let
@@ -119,7 +119,7 @@ let
   cxxFlags = if useLLVMLibcxx then [
     "-I" "${lib.getDev llvmPackages_13.libcxx}/include/c++/v1"
     "-L" "${llvmPackages_13.libcxx}/lib"
-    "-l" "${llvmPackages_13.libcxx}/lib/libc++.so"
+    "-l" "${llvmPackages_13.libcxx}/lib/libc++${stdenv.hostPlatform.extensions.sharedLibrary}"
   ] else [
     "-I" "${gcc-unwrapped}/include/c++/${gcc-unwrapped.version}"
     "-I" "${gcc-unwrapped}/include/c++/${gcc-unwrapped.version}/${stdenv.hostPlatform.config}"