freemat-4.1 build error

gistfile1.txt

[ 32%] Building CXX object libs/libGraphics/CMakeFiles/Graphics.dir/GLRenderEngine.cpp.o
cd /usr/ports/pobj/freemat-4.1/build-i386/libs/libGraphics && /usr/bin/c++   -DFREEMAT_VERSION=\"4.1\" -DRESOURCEDIR=\"/usr/local/share/FreeMat
-4.1\" -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -DHAVE_PCRE -DHAVE_FFTW -DHAVE_FFTWF -DHAVE_ZLIB -DHAVE_UMFPACK -DHAVE_AMD -DHAVE_PORTAUD
IO19 -DHAVE_BOOST -DHAVE_LLVM -DDYN_BLAS -O2 -pipe   -I/usr/local/include -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/thirdparty/UMFP
ACK/Include -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/thirdparty/UFconfig -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/thi
rdparty/AMD/Include -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/thirdparty/UFConfig -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/
libs/libFreeMat -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libGraphics -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libMex 
-I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libXP -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libCore -I/usr/ports/pobj/fre
emat-4.1/FreeMat-4.1-Source/libs/libFN -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libMatC -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-
Source/libs/libMath/libDynBlas -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/src -I/usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/src/toolbo
x/jit -I/usr/ports/pobj/freemat-4.1/build-i386/libs/libGraphics -I/usr/local/include/X11/qt4 -I/usr/local/include/X11/qt4/QtCore -I/usr/local/i
nclude/X11/qt4/QtGui -I/usr/local/include/X11/qt4/QtOpenGL -I/usr/local/include/X11/qt4/QtSvg -o CMakeFiles/Graphics.dir/GLRenderEngine.cpp.o -
c /usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libGraphics/GLRenderEngine.cpp
In file included from /usr/local/include/X11/qt4/QtOpenGL/QtOpenGL:5,
                 from /usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libGraphics/GLRenderEngine.hpp:23,
                 from /usr/ports/pobj/freemat-4.1/FreeMat-4.1-Source/libs/libGraphics/GLRenderEngine.cpp:19:
/usr/local/include/X11/qt4/QtOpenGL/qgl.h:77:20: error: GL/gl.h: No such file or directory
/usr/local/include/X11/qt4/QtOpenGL/qgl.h:79:23: error: GL/glu.h: No such file or directory