alter Mac OSX dependencies build script to get eigen version 3.1.1

This still allows the building of eigen, 2.0.17 just change the version
number at the bottom of the file.

Eigen3 requires an 'out of source' build.

scripts/macosx-build-dependencies.sh

@@ -265,20 +265,29 @@ build_eigen()
   echo "Building eigen" $version "..."
   cd $BASEDIR/src
   rm -rf eigen-$version
-  ## Directory name for v2.0.17
-  rm -rf eigen-eigen-b23437e61a07
+
+  EIGENDIR="none"
+  if [ $version = "2.0.17" ]; then EIGENDIR=eigen-eigen-b23437e61a07; fi
+  if [ $version = "3.1.1" ]; then EIGENDIR=eigen-eigen-43d9075b23ef; fi
+  if [ $EIGENDIR = "none" ]; then
+    echo Unknown eigen version. Please edit script.
+    exit 1
+  fi
+  rm -rf ./$EIGENDIR
+
   if [ ! -f eigen-$version.tar.bz2 ]; then
     curl -LO http://bitbucket.org/eigen/eigen/get/$version.tar.bz2
     mv $version.tar.bz2 eigen-$version.tar.bz2
   fi
   tar xjf eigen-$version.tar.bz2
-  ## File name for v2.0.17
-  ln -s eigen-eigen-b23437e61a07 eigen-$version
+  ln -s ./$EIGENDIR eigen-$version
   cd eigen-$version
+  mkdir build
+  cd build
   if $OPTION_32BIT; then
     EIGEN_EXTRA_FLAGS=";i386"
   fi
-  cmake -DCMAKE_INSTALL_PREFIX=$DEPLOYDIR -DEIGEN_BUILD_LIB=ON -DBUILD_SHARED_LIBS=FALSE -DCMAKE_OSX_DEPLOYMENT_TARGET="$MAC_OSX_VERSION_MIN" -DCMAKE_OSX_ARCHITECTURES="x86_64$EIGEN_EXTRA_FLAGS"
+  cmake -DCMAKE_INSTALL_PREFIX=$DEPLOYDIR -DEIGEN_BUILD_LIB=ON -DBUILD_SHARED_LIBS=FALSE -DCMAKE_OSX_DEPLOYMENT_TARGET="$MAC_OSX_VERSION_MIN" -DCMAKE_OSX_ARCHITECTURES="x86_64$EIGEN_EXTRA_FLAGS" ..
   make -j4
   make install
 }
@@ -297,7 +306,7 @@ done
 
 echo "Using basedir:" $BASEDIR
 mkdir -p $SRCDIR $DEPLOYDIR
-build_eigen 2.0.17
+build_eigen 3.1.1
 build_gmp 5.0.5
 build_mpfr 3.1.0
 build_boost 1.47.0