/configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... none
checking how to run the C preprocessor... gcc -E
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... none
checking for ranlib... ranlib
checking for a BSD-compatible install... /usr/bin/install -c
checking how to run the C++ preprocessor... g++ -E
checking for egrep... grep -E
checking for ANSI C header files... yes
checking for an ANSI C-conforming const... yes
checking for inline... inline
checking whether time.h and sys/time.h may both be included... yes
checking for ar... ar
checking for ld... ld
checking whether byte ordering is bigendian... no
checking for X... libraries , headers 
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking GL/gl.h usability... yes
checking GL/gl.h presence... yes
checking for GL/gl.h... yes
checking GL/glut.h usability... yes
checking GL/glut.h presence... yes
checking for GL/glut.h... yes
checking GL/glx.h usability... yes
checking GL/glx.h presence... yes
checking for GL/glx.h... yes
checking X11/Xlib.h usability... yes
checking X11/Xlib.h presence... yes
checking for X11/Xlib.h... yes
checking X11/Xatom.h usability... yes
checking X11/Xatom.h presence... yes
checking for X11/Xatom.h... yes
checking X11/keysym.h usability... yes
checking X11/keysym.h presence... yes
checking for X11/keysym.h... yes
checking plib/ssg.h usability... no
checking plib/ssg.h presence... no
checking for plib/ssg.h... no
configure: error: Can't find plib/ssg.h. PLIB can be found on http://plib.sourceforge.net/