Don't link NetBSD programs with -ldl in linkXRayRuntimeDeps

Summary:
There is no such library on NetBSD, the corresponding functions like dlopen(3) are in libc.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka, eugenis

Reviewed By: vitalybuka

Subscribers: dberris, llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D41021

llvm-svn: 320220

clang/lib/Driver/ToolChains/Gnu.cpp

@@ -244,7 +244,8 @@ static void linkXRayRuntimeDeps(const ToolChain &TC, const ArgList &Args,
   CmdArgs.push_back("-lrt");
   CmdArgs.push_back("-lm");
 
-  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD)
+  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
+      TC.getTriple().getOS() != llvm::Triple::NetBSD)
     CmdArgs.push_back("-ldl");
 }