qt: support building with 10.10+ SDKs

var/spack/repos/builtin/packages/qt/package.py

@@ -56,6 +56,7 @@ class Qt(Package):
     patch('btn_trigger_happy.patch', when='@5.7.0:')
 
     patch('qt4-corewlan-new-osx.patch', when='@4')
+    patch('qt4-el-capitan.patch', when='@4')
 
     # Use system openssl for security.
     depends_on("openssl")

var/spack/repos/builtin/packages/qt/qt4-el-capitan.patch

@@ -0,0 +1,31 @@
+From 27aa46933bb32a88c310fe5918a49a3f34d65dfe Mon Sep 17 00:00:00 2001
+From: Mike McQuaid <mike@mikemcquaid.com>
+Date: Sun, 13 Sep 2015 11:55:59 +0100
+Subject: [PATCH] Fix El Capitan build.
+
+---
+ src/gui/painting/qpaintengine_mac.cpp | 8 +-------
+ 1 file changed, 1 insertion(+), 7 deletions(-)
+
+diff --git a/src/gui/painting/qpaintengine_mac.cpp b/src/gui/painting/qpaintengine_mac.cpp
+index 4aa0668..63b646d 100644
+--- a/src/gui/painting/qpaintengine_mac.cpp
++++ b/src/gui/painting/qpaintengine_mac.cpp
+@@ -340,13 +340,7 @@ CGColorSpaceRef QCoreGraphicsPaintEngine::macDisplayColorSpace(const QWidget *wi
+     }
+ 
+     // Get the color space from the display profile.
+-    CGColorSpaceRef colorSpace = 0;
+-    CMProfileRef displayProfile = 0;
+-    CMError err = CMGetProfileByAVID((CMDisplayIDType)displayID, &displayProfile);
+-    if (err == noErr) {
+-        colorSpace = CGColorSpaceCreateWithPlatformColorSpace(displayProfile);
+-        CMCloseProfile(displayProfile);
+-    }
++    CGColorSpaceRef colorSpace = CGDisplayCopyColorSpace(displayID);
+ 
+     // Fallback: use generic DeviceRGB
+     if (colorSpace == 0)
+-- 
+2.3.8 (Apple Git-58)
+