[Driver] Add driver support for Fuchsia

Provide toolchain and tool support for Fuchsia operating system.
Fuchsia uses compiler-rt as the runtime library and libc++, libc++abi
and libunwind as the C++ standard library. lld is used as a default
linker.

Differential Revision: https://reviews.llvm.org/D25117

llvm-svn: 283420

1 files changed, 15 insertions, 0 deletions

diff --git a/clang/lib/Driver/Tools.h b/clang/lib/Driver/Tools.h
index 6577ce92b92..724b82932b1 100644
--- a/clang/lib/Driver/Tools.h
+++ b/clang/lib/Driver/Tools.h
@@ -596,6 +596,21 @@ public:
 };
 } // end namespace nacltools
 
+namespace fuchsia {
+class LLVM_LIBRARY_VISIBILITY Linker : public GnuTool {
+public:
+  Linker(const ToolChain &TC) : GnuTool("fuchsia::Linker", "ld.lld", TC) {}
+
+  bool hasIntegratedCPP() const override { return false; }
+  bool isLinkJob() const override { return true; }
+
+  void ConstructJob(Compilation &C, const JobAction &JA,
+                    const InputInfo &Output, const InputInfoList &Inputs,
+                    const llvm::opt::ArgList &TCArgs,
+                    const char *LinkingOutput) const override;
+};
+} // end namespace fuchsia
+
 /// minix -- Directly call GNU Binutils assembler and linker
 namespace minix {
 class LLVM_LIBRARY_VISIBILITY Assembler : public GnuTool {