From 632c823b8bfd3fd5a4b77628eddd6161c5d8367e Mon Sep 17 00:00:00 2001
From: Dan Gohman <sunfish@google.com>
Date: Mon, 24 Feb 2014 08:50:27 -0800
Subject: Define an Emscripten toolchain.

This is pretty minimal right now; eventually this may subsume code currently
in the emscripten wrapper scripts.
---
 lib/Driver/Driver.cpp     |  3 +++
 lib/Driver/ToolChains.cpp | 30 ++++++++++++++++++++++++++++++
 lib/Driver/ToolChains.h   | 14 ++++++++++++++
 3 files changed, 47 insertions(+)

diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 1dbbc9a342..6d0ac5733a 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -1759,6 +1759,9 @@ const ToolChain &Driver::getToolChain(const ArgList &Args,
     case llvm::Triple::Win32:
       TC = new toolchains::Windows(*this, Target, Args);
       break;
+    case llvm::Triple::Emscripten:
+      TC = new toolchains::EmscriptenToolChain(*this, Target, Args);
+      break;
     case llvm::Triple::MinGW32:
       // FIXME: We need a MinGW toolchain. Fallthrough for now.
     default:
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index fffba0e4e5..2f3cf15490 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1738,6 +1738,36 @@ bool TCEToolChain::isPICDefaultForced() const {
   return false;
 }
 
+/// EmscriptenToolChain - A tool chain for the Emscripten C/C++ to JS compiler.
+
+EmscriptenToolChain::EmscriptenToolChain(const Driver &D, const llvm::Triple& Triple,
+                           const ArgList &Args)
+  : ToolChain(D, Triple, Args) {
+}
+
+EmscriptenToolChain::~EmscriptenToolChain() {
+}
+
+bool EmscriptenToolChain::IsMathErrnoDefault() const {
+  return false;
+}
+
+bool EmscriptenToolChain::IsObjCNonFragileABIDefault() const {
+  return true;
+}
+
+bool EmscriptenToolChain::isPICDefault() const {
+  return false;
+}
+
+bool EmscriptenToolChain::isPIEDefault() const {
+  return false;
+}
+
+bool EmscriptenToolChain::isPICDefaultForced() const {
+  return false;
+}
+
 /// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
 
 OpenBSD::OpenBSD(const Driver &D, const llvm::Triple& Triple, const ArgList &Args)
diff --git a/lib/Driver/ToolChains.h b/lib/Driver/ToolChains.h
index 3afd8dd228..50973073da 100644
--- a/lib/Driver/ToolChains.h
+++ b/lib/Driver/ToolChains.h
@@ -577,6 +577,20 @@ public:
   bool isPICDefaultForced() const;
 };
 
+/// EmscriptenToolChain - A tool chain for the Emscripten C/C++ to JS compiler.
+class LLVM_LIBRARY_VISIBILITY EmscriptenToolChain : public ToolChain {
+public:
+  EmscriptenToolChain(const Driver &D, const llvm::Triple& Triple,
+                      const ArgList &Args);
+  ~EmscriptenToolChain();
+
+  bool IsMathErrnoDefault() const;
+  bool IsObjCNonFragileABIDefault() const;
+  bool isPICDefault() const;
+  bool isPIEDefault() const;
+  bool isPICDefaultForced() const;
+};
+
 class LLVM_LIBRARY_VISIBILITY Windows : public ToolChain {
 public:
   Windows(const Driver &D, const llvm::Triple& Triple, const ArgList &Args);
-- 
cgit v1.2.3-18-g5258