Add shared and rtti options to LLVM.

* Added a --shared option to build LLVM as a shared library.
  (Shouldn't be used with --universal as it will cause the build to fail)

* Added a --rtti option to build LLVM with RTTI information.
  (Can be used, for example, to build LLVM for use with Rubinius)

Closes #3847.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

1 files changed, 20 insertions, 4 deletions

diff --git a/Library/Formula/llvm.rb b/Library/Formula/llvm.rb
index 2c6718e0b..eb0df61f1 100644
--- a/Library/Formula/llvm.rb
+++ b/Library/Formula/llvm.rb
@@ -2,6 +2,8 @@ require 'formula'
 
 def build_clang?; ARGV.include? '--with-clang'; end
 def build_universal?; ARGV.include? '--universal'; end
+def build_shared?; ARGV.include? '--shared'; end
+def build_rtti?; ARGV.include? '--rtti'; end
 
 class Clang <Formula
   url       'http://llvm.org/releases/2.8/clang-2.8.tgz'
@@ -16,12 +18,19 @@ class Llvm <Formula
 
   def options
     [['--with-clang', 'Also build & install clang'],
+     ['--shared', 'Build shared library'],
+     ['--rtti', 'Build with RTTI information'],
      ['--universal', 'Build both i386 and x86_64 architectures']]
   end
 
   def install
     ENV.gcc_4_2 # llvm can't compile itself
 
+    if build_shared? && build_universal?
+      onoe "Cannot specify both shared and universal (will not build)"
+      exit 1
+    end
+
     if build_clang?
       clang_dir = Pathname.new(Dir.pwd)+'tools/clang'
       Clang.new.brew { clang_dir.install Dir['*'] }
@@ -32,10 +41,17 @@ class Llvm <Formula
       ENV['UNIVERSAL_ARCH'] = 'i386 x86_64'
     end
 
-    system "./configure", "--prefix=#{prefix}",
-                          "--enable-targets=host-only",
-                          "--enable-optimized"
-    system "make" # seperate steps required, otherwise the build fails
+    ENV['REQUIRES_RTTI'] = '1' if build_rtti?
+
+    configure_options = ["--prefix=#{prefix}",
+                         "--enable-targets=host-only",
+                         "--enable-optimized"]
+
+    configure_options << "--enable-shared" if build_shared?
+
+    system "./configure", *configure_options
+
+    system "make" # separate steps required, otherwise the build fails
     system "make install"
 
     if build_clang?