From 4fe8f89039a715e37e1aeb5953383627fc260ab4 Mon Sep 17 00:00:00 2001
From: FX Coudert <fxcoudert@gmail.com>
Date: Sun, 3 Sep 2017 23:34:52 +0200
Subject: [PATCH] gcc@4.9: patch for Xcode 9

---
 Formula/gcc@4.9.rb | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Formula/gcc@4.9.rb b/Formula/gcc@4.9.rb
index e3b1eb26d3..1dc35ecde8 100644
--- a/Formula/gcc@4.9.rb
+++ b/Formula/gcc@4.9.rb
@@ -59,6 +59,23 @@ class GccAT49 < Formula
   # GCC bootstraps itself, so it is OK to have an incompatible C++ stdlib
   cxxstdlib_check :skip
 
+  # Fix build with Xcode 9
+  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82091
+  if DevelopmentTools.clang_build_version >= 900
+    patch do
+      url "https://raw.githubusercontent.com/Homebrew/formula-patches/c2dae73416/gcc%404.9/xcode9.patch"
+      sha256 "92c13867afe18ccb813526c3b3c19d95a2dd00973f9939cf56ab7698bdd38108"
+    end
+  end
+
+  # Fix issues with macOS 10.13 headers and parallel build on APFS
+  if MacOS.version >= :high_sierra
+    patch do
+      url "https://raw.githubusercontent.com/Homebrew/formula-patches/19d56dcb8c/gcc%404.9/high_sierra.patch"
+      sha256 "360ba78af8b13cda0503eef2c809b98404613a7cda9798e53c8b65a9b61b37b5"
+    end
+  end
+
   def install
     # GCC will suffer build errors if forced to use a particular linker.
     ENV.delete "LD"