isis build error

hi, i'm seeing the following error when building isis on a solaris 5.8
host. has this problem been reported previously? suggestions? 
the contents of my site.def include:

SLANGINC = # directory containing slang.h
SLANGINC = /usr/local/include
SLANGLIB = # directory containing libslang.a (or .so)
SLANGLIB = /usr/local/lib

FITSINC = # directory containing fitsio.h
FITSINC = /usr/local/include/cfitsio
FITSLIB = # directory containing libcfitsio.a
FITSLIB = /usr/local/lib


PGPLOTINC = # directory containing cpgplot.h
PGPLOTINC = /usr/local/pgplot
PGPLOTLIB = # directory containing libpgplot.a (or .so)
PGPLOTLIB = /usr/local/pgplot

the version of pgplot installed is v5.2.2
thanks in advance,
janet


gcc -o /usr/local/isis-0.9.67/src/objs/isis  /usr/local/isis-0.9.67/src/objs/isis.o  -Wl,-R/opt/SUNWspro/lib -L/usr/local/isis-0.9.67/src/objs -L/usr/local/isis-0.9.67/libsrc/objs -L/usr/local/isis-0.9.67/math/objs -L/usr/local/lib -L/usr/local/lib -L/usr/local/pgplot -lcmds -lisis -lisismath -lslang -lcpgplot -lpgplot -lcfitsio -ldl -lX11 -lsocket  -lnsl -L/opt/SUNWspro/lib -lF77 -lM77 -lsunmath -lm        
/usr/local/lib/libpgplot.so: undefined reference to `e_wsfe'
/usr/local/lib/libpgplot.so: undefined reference to `s_rsfe'
/usr/local/lib/libpgplot.so: undefined reference to `s_cmp'
/usr/local/lib/libpgplot.so: undefined reference to `r_lg10'
/usr/local/lib/libpgplot.so: undefined reference to `do_uio'
/usr/local/lib/libpgplot.so: undefined reference to `e_rsfe'
/usr/local/lib/libpgplot.so: undefined reference to `r_mod'
/usr/local/lib/libpgplot.so: undefined reference to `f_inqu'
/usr/local/lib/libpgplot.so: undefined reference to `e_rsue'
/usr/local/lib/libpgplot.so: undefined reference to `i_indx'
/usr/local/lib/libpgplot.so: undefined reference to `do_fio'
/usr/local/lib/libpgplot.so: undefined reference to `e_wsfi'
/usr/local/lib/libpgplot.so: undefined reference to `s_cat'
/usr/local/lib/libpgplot.so: undefined reference to `s_stop'
/usr/local/lib/libpgplot.so: undefined reference to `s_wsfi'
/usr/local/lib/libpgplot.so: undefined reference to `G77_getenv_0'
/usr/local/lib/libpgplot.so: undefined reference to `s_rsue'
/usr/local/lib/libpgplot.so: undefined reference to `f_clos'
/usr/local/lib/libpgplot.so: undefined reference to `f_open'
/usr/local/lib/libpgplot.so: undefined reference to `s_wsfe'
/usr/local/lib/libpgplot.so: undefined reference to `s_copy'
collect2: ld returned 1 exit status
make[1]: *** [/usr/local/isis-0.9.67/src/objs/isis] Error 1
make[1]: Leaving directory `/usr/local/isis-0.9.67/src'
make: *** [all] Error 2
origins:/usr/local/isis-0.9.67>   


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