Merge pull request #46255 from hpvb/fix-clang-atomic

Use -latomic when linking whe using clang on Linux

platform/linuxbsd/detect.py

@@ -127,6 +127,7 @@ def configure(env):
             env["CC"] = "clang"
             env["CXX"] = "clang++"
         env.extra_suffix = ".llvm" + env.extra_suffix
+        env.Append(LIBS=["atomic"])
 
     if env["use_lld"]:
         if env["use_llvm"]: