From 3ec40c062e5b3bdfebc5cbfb36a5766d1d0905d6 Mon Sep 17 00:00:00 2001
From: Xiyue Deng
Date: Thu, 24 Oct 2013 00:26:09 -0700
Subject: Clang standard library selection.

* Add new ENV function for selecting stdlib for Clang.
  - The selection is no-op for non-system-clang compilers.
  - Both superenv and stdenv are handled.
* Add new HOMEBREW_CCCFG flag and ccwrapper handling.
---
 Library/Homebrew/extend/ENV/std.rb   | 12 ++++++++++++
 Library/Homebrew/extend/ENV/super.rb | 13 +++++++++++++
 2 files changed, 25 insertions(+)

(limited to 'Library/Homebrew')

diff --git a/Library/Homebrew/extend/ENV/std.rb b/Library/Homebrew/extend/ENV/std.rb
index 0d5613256..92bdfd794 100644
--- a/Library/Homebrew/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/ENV/std.rb
@@ -333,6 +333,18 @@ module Stdenv
     end
   end
 
+  def libcxx
+    if compiler == :clang
+      append 'CXX', '-stdlib=libc++'
+    end
+  end
+
+  def libstdcxx
+    if compiler == :clang
+      append 'CXX', '-stdlib=libstdc++'
+    end
+  end
+
   def replace_in_cflags before, after
     CC_FLAG_VARS.each do |key|
       self[key] = self[key].sub(before, after) if has_key?(key)
diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index 2be8a62d4..169a4200c 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -99,6 +99,7 @@ module Superenv
     #     make/bsdmake wrappers currently.
     # x - Enable C++11 mode.
     # g - Enable "-stdlib=libc++" for clang.
+    # h - Enable "-stdlib=libstdc++" for clang.
     #
     # On 10.8 and newer, these flags will also be present:
     # s - apply fix for sed's Unicode support
@@ -123,6 +124,18 @@ module Superenv
     end
   end
 
+  def libcxx
+    if self['HOMEBREW_CC'] == 'clang'
+      append 'HOMEBREW_CCCFG', "g", ''
+    end
+  end
+
+  def libstdcxx
+    if self['HOMEBREW_CC'] == 'clang'
+      append 'HOMEBREW_CCCFG', "h", ''
+    end
+  end
+
   # m32 on superenv does not add any CC flags. It prevents "-m32" from being erased.
   def m32
     append 'HOMEBREW_CCCFG', "3", ''
-- 
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