build: only add llvm library path if its not a native path

build.zig

@@ -9,6 +9,7 @@ const fs = std.fs;
 const InstallDirectoryOptions = std.Build.InstallDirectoryOptions;
 const assert = std.debug.assert;
 const GenerateDef = @import("deps/aro/build/GenerateDef.zig");
+const NativePaths = std.zig.system.NativePaths;
 
 const zig_version = std.SemanticVersion{ .major = 0, .minor = 12, .patch = 0 };
 const stack_size = 32 * 1024 * 1024;
@@ -633,10 +634,25 @@ fn addCmakeCfgOptionsToExe(
             cfg.cmake_static_library_suffix,
         }),
     }) });
+
+    const add_llvm_lib_dir = blk: {
+        const native_paths = NativePaths.detect(b.allocator, exe.target_info) catch {
+            break :blk true;
+        };
+
+        for (native_paths.lib_dirs.items) |lib_dir| {
+            if (mem.eql(u8, lib_dir, cfg.llvm_lib_dir))
+                break :blk false;
+        }
+
+        break :blk true;
+    };
+
     assert(cfg.lld_include_dir.len != 0);
     exe.addIncludePath(.{ .cwd_relative = cfg.lld_include_dir });
     exe.addIncludePath(.{ .cwd_relative = cfg.llvm_include_dir });
-    exe.addLibraryPath(.{ .cwd_relative = cfg.llvm_lib_dir });
+    if (add_llvm_lib_dir)
+        exe.addLibraryPath(.{ .cwd_relative = cfg.llvm_lib_dir });
     addCMakeLibraryList(exe, cfg.clang_libraries);
     addCMakeLibraryList(exe, cfg.lld_libraries);
     addCMakeLibraryList(exe, cfg.llvm_libraries);