llvm: add support for building Clang with ASan

Closes #17039.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/Library/Formula/llvm.rb b/Library/Formula/llvm.rb
index d20ea232c..3708ac37e 100644
--- a/Library/Formula/llvm.rb
+++ b/Library/Formula/llvm.rb
@@ -8,6 +8,14 @@ class Clang < Formula
   head      'http://llvm.org/git/clang.git'
 end
 
+class CompilerRt < Formula
+  homepage  'http://llvm.org/'
+  url       'http://llvm.org/releases/3.2/compiler-rt-3.2.src.tar.gz'
+  sha1      '718c0249a00e928f8bba32c84771da998ea4d42f'
+
+  head      'http://llvm.org/git/compiler-rt.git'
+end
+
 class Llvm < Formula
   homepage  'http://llvm.org/'
   url       'http://llvm.org/releases/3.2/llvm-3.2.src.tar.gz'
@@ -23,6 +31,7 @@ class Llvm < Formula
 
   option :universal
   option 'with-clang', 'Build Clang C/ObjC/C++ frontend'
+  option 'with-asan', 'Include support for -faddress-sanitizer (from compiler-rt)'
   option 'shared', 'Build LLVM as a shared library'
   option 'all-targets', 'Build all target backends'
   option 'rtti', 'Build with C++ RTTI'
@@ -33,7 +42,13 @@ class Llvm < Formula
       exit 1
     end
 
-    Clang.new("clang").brew { clang_dir.install Dir['*'] } if build.include? 'with-clang'
+    Clang.new("clang").brew do
+      clang_dir.install Dir['*']
+    end if build.include? 'with-clang'
+
+    CompilerRt.new("compiler-rt").brew do
+      (buildpath/'projects/compiler-rt').install Dir['*']
+    end if build.include? 'with-asan'
 
     if build.universal?
       ENV['UNIVERSAL'] = '1'