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From dad564a1081f62fe1957175e2b060ca1778ff72b Mon Sep 17 00:00:00 2001
From: Dan McGregor <dan.mcgregor@usask.ca>
Date: Wed, 26 Apr 2017 20:29:41 -0600
Subject: [PATCH] clang: driver: Check sysroot for ldso path

OE does not necessarily follow the default path for the dynamic linker,
therefore adjust it for OE. Check for the default path, and if it isn't
there, check /lib.

Signed-off-by: Dan McGregor <dan.mcgregor@usask.ca>
---
 clang/lib/Driver/ToolChains/Linux.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
index ed907549929..6adf581a882 100644
--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -596,11 +596,19 @@ std::string Linux::getDynamicLinker(const ArgList &Args) const {
     LibDir = "lib64";
     Loader =
         (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1";
+    if (!getVFS().exists(getDriver().SysRoot + "/" + LibDir + "/" + Loader) &&
+         getVFS().exists(getDriver().SysRoot + "/lib/" + Loader)) {
+        LibDir = "lib";
+    }
     break;
   case llvm::Triple::ppc64le:
     LibDir = "lib64";
     Loader =
         (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2";
+    if (!getVFS().exists(getDriver().SysRoot + "/" + LibDir + "/" + Loader) &&
+         getVFS().exists(getDriver().SysRoot + "/lib/" + Loader)) {
+        LibDir = "lib";
+    }
     break;
   case llvm::Triple::riscv32: {
     StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
@@ -622,6 +630,10 @@ std::string Linux::getDynamicLinker(const ArgList &Args) const {
   case llvm::Triple::sparcv9:
     LibDir = "lib64";
     Loader = "ld-linux.so.2";
+    if (!getVFS().exists(getDriver().SysRoot + "/" + LibDir + "/" + Loader) &&
+         getVFS().exists(getDriver().SysRoot + "/lib/" + Loader)) {
+        LibDir = "lib";
+    }
     break;
   case llvm::Triple::systemz:
     LibDir = "lib";
@@ -636,6 +648,10 @@ std::string Linux::getDynamicLinker(const ArgList &Args) const {
 
     LibDir = X32 ? "libx32" : "lib64";
     Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2";
+    if (!getVFS().exists(getDriver().SysRoot + "/" + LibDir + "/" + Loader) &&
+         getVFS().exists(getDriver().SysRoot + "/lib/" + Loader)) {
+        LibDir = "lib";
+    }
     break;
   }
   }