From 2b063246acbbd646b9a15c9ed852db6f1573a370 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger <joerg@bec.de>
Date: Sun, 2 Feb 2014 22:47:37 +0000
Subject: [PATCH] Handle compat support for EABI/old APCS compatibility on
 NetBSD/ARM.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200665 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Driver/ToolChains.cpp | 21 ++++++++++++++++++++-
 lib/Driver/Tools.cpp      | 17 +++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 2a1521f7c6..1b447e41e6 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -2230,8 +2230,27 @@ NetBSD::NetBSD(const Driver &D, const llvm::Triple& Triple, const ArgList &Args)
     // doesn't work.
     // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
     // what all logic is needed to emulate the '=' prefix here.
-    if (Triple.getArch() == llvm::Triple::x86)
+    switch (Triple.getArch()) {
+    case llvm::Triple::x86:
       getFilePaths().push_back("=/usr/lib/i386");
+      break;
+    case llvm::Triple::arm:
+    case llvm::Triple::thumb:
+      switch (Triple.getEnvironment()) {
+      case llvm::Triple::EABI:
+      case llvm::Triple::EABIHF:
+      case llvm::Triple::GNUEABI:
+      case llvm::Triple::GNUEABIHF:
+        getFilePaths().push_back("=/usr/lib/eabi");
+        break;
+      default:
+        getFilePaths().push_back("=/usr/lib/oabi");
+        break;
+      }
+      break;
+    default:
+      break;
+    }
 
     getFilePaths().push_back("=/usr/lib");
   }
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index d477a6a413..cc0f7795ad 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -6117,6 +6117,23 @@ void netbsd::Link::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back("elf_i386");
   }
 
+  // On ARM, the linker can generate either EABI or the older APCS.
+  // Instruct it to use the correct emulation.
+  if (getToolChain().getArch() == llvm::Triple::arm) {
+    CmdArgs.push_back("-m");
+    switch (getToolChain().getTriple().getEnvironment()) {
+    case llvm::Triple::EABI:
+    case llvm::Triple::EABIHF:
+    case llvm::Triple::GNUEABI:
+    case llvm::Triple::GNUEABIHF:
+      CmdArgs.push_back("armelf_nbsd_eabi");
+      break;
+    default:
+      CmdArgs.push_back("armelf_nbsd");
+      break;
+    }
+  }
+
   if (Output.isFilename()) {
     CmdArgs.push_back("-o");
     CmdArgs.push_back(Output.getFilename());
-- 
2.40.0