libQGLViewer 2.6.1. Patch to have the framework linked in the lib directory

Closes Homebrew/homebrew#37101.

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

Formula/libqglviewer.rb

@@ -2,8 +2,8 @@ require 'formula'
 
 class Libqglviewer < Formula
   homepage 'http://www.libqglviewer.com/'
-  url 'http://www.libqglviewer.com/src/libQGLViewer-2.5.1.tar.gz'
-  sha1 '21e10a28153cb649e29bbe9a288eecc280b30f0e'
+  url 'http://www.libqglviewer.com/src/libQGLViewer-2.6.1.tar.gz'
+  sha1 '9220b3f2b8629df36bf91cc8de397e65b2cab476'
 
   head 'https://github.com/GillesDebunne/libQGLViewer.git'
 
@@ -19,6 +19,12 @@ class Libqglviewer < Formula
 
   depends_on 'qt'
 
+  # This patches makes the package install QGLViewer.framework under
+  # #{lib}, where it will be picked by homebrew.
+  # Patch has been submitted to the developer, check with versions
+  # newer than 2.6.1 if this is still required.
+  patch :DATA
+
   def install
     args = ["PREFIX=#{prefix}"]
     args << "CONFIG += x86 x86_64" if build.universal?
@@ -29,3 +35,44 @@ class Libqglviewer < Formula
     end
   end
 end
+
+__END__
+diff --git a/QGLViewer/QGLViewer.pro b/QGLViewer/QGLViewer.pro
+index d805aa0..736a58f 100644
+--- a/QGLViewer/QGLViewer.pro
++++ b/QGLViewer/QGLViewer.pro
+@@ -240,26 +240,14 @@ macx|darwin-g++ {
+	FRAMEWORK_HEADERS.path = Headers
+	QMAKE_BUNDLE_DATA += FRAMEWORK_HEADERS
+
+-	DESTDIR = $${HOME_DIR}/Library/Frameworks/
+-
+-	# For a Framework, 'include' and 'lib' do no make sense.
+-	# These and prefix will all define the DESTDIR, in that order in case several are defined
+-	!isEmpty( INCLUDE_DIR ) {
+-	  DESTDIR = $${INCLUDE_DIR}
+-	}
+-
+-	!isEmpty( LIB_DIR ) {
+-	  DESTDIR = $${LIB_DIR}
+-	}
+-
+-	!isEmpty( PREFIX ) {
+-	  DESTDIR = $${PREFIX}
+-	}
+-
+-	QMAKE_POST_LINK=cd $$DESTDIR/QGLViewer.framework/Headers && (test -L QGLViewer || ln -s . QGLViewer)
+-
+-	#QMAKE_LFLAGS_SONAME  = -Wl,-install_name,@executable_path/../Frameworks/
+-	#QMAKE_LFLAGS_SONAME  = -Wl,-install_name,
++        !isEmpty( LIB_DIR ) {
++            DESTDIR = $${LIB_DIR}
++        }
++
++        # or to $${PREFIX}/lib otherwise
++        !isEmpty( PREFIX ) {
++            DESTDIR = $${PREFIX}/lib
++        }
+
+	# Framework already installed, with includes
+	INSTALLS -= include target