Netgen 5.3.1 build OCC 7

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Procedure:

Download Netgen in sourceforge.net

wget https://sourceforge.net/projects/netgen-mesher/files/netgen-mesher/5.3/netgen-5.3.1.tar.gz
tar xvzf netgen-5.3.1.tar.gz
mv netgen-5.3.1/* .
rm netgen-5.3.1* -fR

Patch nglib-occt7

curl -L https://github.com/FreeCAD/homebrew-freecad/releases/download/0/nglib-occt7.patch | patch -p1

OR

wget https://raw.githubusercontent.com/luvres/netgen/master/nglib-occt7.patch
patch -p1 < nglib-occt7.patch

Patch occdir

curl -L https://raw.githubusercontent.com/luvres/netgen/master/occdir.patch | patch

OR

wget https://raw.githubusercontent.com/luvres/netgen/master/occdir.patch
patch -p0 < occdir.patch

Occdir patch source

sed -i '/DOCCGEOMETRY/s/\/usr/$occdir/' configure
sed -i '/DOCCGEOMETRY/s/inc/include/' configure
sed -i '/DOCCGEOMETRY/s/\/usr/$occdir/' configure.ac
sed -i '/DOCCGEOMETRY/s/inc/include/' configure.ac