mathgl 2.0.3 plus options

MathGL gets a major overhaul because it can do a lot more.

- Upgrade to 2.0.3
- By default enable glut, gsl, jpeg, png, pthread, pdf
- Disable python (refuses to find numpy)
- Disable octave interface (installs a tarball to ~/ocatave)
- Add a dep on jpeg to support our default image capability
- Add a dep on libharu to support our default pdf capability.
- Add a dep on cmake because it's the only builder now.
- Add an option to enable fltk widget and mglview using X11.
- Add an option to enable qt4 widget, udav, and mglview using Qt4.
- Add an option to enable wxWidgets widget
- Add an option to enable GIF support.
- Add an option to enable hdf5 support.
- Add optional deps for the above options.
- Remove a symlink in the source, ChangeLog, to fix install errors.
- Build OOS.
- Install the `mgl_example` files manually.
- Works well with superenv.

Closes Homebrew/homebrew#14799.

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

Formula/mathgl.rb

@@ -2,23 +2,52 @@ require 'formula'
 
 class Mathgl < Formula
   homepage 'http://mathgl.sourceforge.net/'
-  url 'http://downloads.sourceforge.net/mathgl/mathgl-1.11.2.tar.gz'
-  sha1 '16b9ab58e654c5b91374f8a35eafc33630d7f5c0'
+  url 'http://sourceforge.net/projects/mathgl/files/mathgl/mathgl%202.0.3/mathgl-2.0.3.tar.gz'
+  sha1 'c032cf53de3f6d3d5e45f6ff9e26889617770f02'
 
-  depends_on 'gsl'
-  depends_on :libpng
+  option 'fltk',   'Build the fltk widget and mglview using X11'
+  option 'qt4',    'Build the Qt widget, the udav gui, and mglview using Qt4'
+  option 'wx',     'Build the wxWidget widget'
+  option 'gif',    'Build support for GIF'
+  option 'hdf5',   'Build support for hdf5'
+
+  depends_on 'cmake'   => :build
+  depends_on 'gsl'     => :recommended
+  depends_on 'jpeg'    => :recommended
+  depends_on 'libharu' => :recommended
+  depends_on :libpng   => :recommended
+  depends_on 'hdf5'   if build.include? 'hdf5'
+  depends_on 'fltk'   if build.include? 'fltk'
+  depends_on 'qt'     if build.include? 'qt4'
+  depends_on 'wxmac'  if build.include? 'wx'
+  depends_on 'giflib' if build.include? 'gif'
+  depends_on :x11 if build.include? 'fltk'
 
   def install
-    ENV['LIBS'] = '-lz'
+    args = std_cmake_args + %w[
+      -Denable-glut=ON
+      -Denable-gsl=ON
+      -Denable-jpeg=ON
+      -Denable-pthread=ON
+      -Denable-pdf=ON
+      -Denable-python=OFF
+      -Denable-octave=OFF
+    ]
 
-    # Fixed upstream: this line can be removed when v2 is released
-    inreplace ["mgl/mgl_export.cpp", "mgl/mgl_data_png.cpp"] do |s|
-      s.gsub! /#include <png.h>/, "#include <zlib.h>\n#include <png.h>"
+    args << '-Denable-qt=ON'      if build.include? 'qt4'
+    args << '-Denable-gif=ON'     if build.include? 'gif'
+    args << '-Denable-hdf5_18=ON' if build.include? 'hdf5'
+    args << '-Denable-fltk=ON'    if build.include? 'fltk'
+    args << '-Denable-wx=ON'      if build.include? 'wx'
+    args << '..'
+    rm 'ChangeLog' if File.exist? 'ChangeLog' # rm this problematic symlink.
+    mkdir 'brewery' do
+      system 'cmake', *args
+      system 'make install'
+      cd 'examples' do
+        bin.install Dir['mgl*_example']
+      end
     end
-
-    system "./configure", "--prefix=#{prefix}"
-    system "make"
-    system "make install"
   end
 
   def test