$ sudo ./PGPLOT_install 
...


Warning: Possible change of value in conversion from REAL(4) to INTEGER(4) at (1)
gcc -c -Wall -fPIC -DPG_PPU -O -I. -I/usr/X11R6/include /home/user/ifeffit/pgplot/drivers/pndriv.c
/home/user/ifeffit/pgplot/drivers/pndriv.c: In function �write_image_file�:
/home/user/ifeffit/pgplot/drivers/pndriv.c:225:7: error: dereferencing pointer to incomplete type
make: *** [pndriv.o] Error 1
 = Cleaning up and preparing for test
 = = = = = = = = = = = = = = = = = = = = = = = = = = 
 = Uh-oh.  PGPLOT is missing some important files!
 = It looks like PGPLOT failed during building or
 = is only partially installed.
 = 
 = Please consult the PGPLOT installation instructions
 = in the subdirectory  pgplot/, and the log file:
 =    /home/user/ifeffit/PGPLOT_install.log
 = which contains a full list of commands run.
 =
 = You may want to repeat these steps by hand or 
 = consult the PGPLOT installations instructions 
 = in install-unix.txt
 = = = = = = = = = = = = = = = = = = = = = = = = = =