Add clang for 2016.1

lld.spec

@@ -2,12 +2,22 @@
 %define libname %mklibname %{name} %{major}
 %define devname %mklibname %{name} -d
 
+%if %{mdvver} <= 201610
+%bcond_without clang
+%else
+%bcond_with clang
+%endif
+
+%if %{with clang}
+%define debug_package %{nil}
+%endif
+
 %bcond_without git
 
 Summary:	The LLVM Linker
 Name:		lld
 Version:	10.0.1
-Release:	1
+Release:	2
 Group:		Development/Other
 License:	NCSA
 Url:		http://llvm.org
@@ -17,6 +27,10 @@ Source0:	https://github.com/llvm/llvm-project/releases/download/llvmorg-%{versio
 Source0:	http://releases.llvm.org/%{version}/%{name}-%{version}.src.tar.xz
 %endif
 BuildRequires:	cmake
+%if %{with clang}
+BuildRequires:	clang
+BuildRequires:	libcxx-devel
+%endif
 BuildRequires:	llvm-devel = %{version}
 BuildRequires:	ncurses-devel
 BuildRequires:	zlib-devel
@@ -70,6 +84,11 @@ programs that use the LLD infrastructure.
 %setup -qn %{name}-%{version}.src
 
 %build
+%if %{with clang}
+%clang_gcc_wrapper
+export CC=clang
+export CXX=clang++
+%endif
 %cmake \
 	-DLLVM_LINK_LLVM_DYLIB:BOOL=ON \
 	-DLLVM_DYLIB_COMPONENTS="all" \