show how to specify alternate path to clang compiler

llvm-svn: 155678

1 files changed, 11 insertions, 5 deletions

diff --git a/lld/docs/getting_started.rst b/lld/docs/getting_started.rst
index d20b25700d6..75cfd1905a1 100644
--- a/lld/docs/getting_started.rst
+++ b/lld/docs/getting_started.rst
@@ -14,7 +14,7 @@ Building lld
 On Unix-like Systems
 ~~~~~~~~~~~~~~~~~~~~
 
-#. Get the required tools.
+1. Get the required tools.
 
   * `CMake 2.8`_\+.
   * make (or any build system CMake supports).
@@ -28,12 +28,12 @@ On Unix-like Systems
 .. _libc++: http://libcxx.llvm.org/
 .. _Python 2.4: http://python.org/download/
 
-#. Check out LLVM::
+2. Check out LLVM::
 
      $ cd path/to/llvm-project
      $ svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
 
-#. Check out lld::
+3. Check out lld::
 
      $ cd llvm/tools
      $ svn co http://llvm.org/svn/llvm-project/lld/trunk lld
@@ -41,13 +41,19 @@ On Unix-like Systems
   * lld can also be checked out to ``path/to/llvm-project`` and built as an external
     project.
 
-#. Build LLVM and lld::
+4. Build LLVM and lld::
 
      $ cd path/to/llvm-build/llvm (out of source build required)
      $ cmake -G "Unix Makefiles" path/to/llvm-project/llvm
      $ make
 
-#. Test::
+  * If you want to build with clang and it is not the default compiler or
+    it is installed in an alternate location, you'll need to tell the cmake tool
+    the location of the C and C++ compiler via CMAKE_C_COMPILER and
+    CMAKE_CXX_COMPILER. For example::
+        $ cmake -DCMAKE_CXX_COMPILER=/path/to/clang++ -DCMAKE_C_COMPILER=/path/to/clang ...
+
+5. Test::
 
      $ make lld-test