g77 can find these, but absoft fortran can't. They come indirectly (directly?) from pgplot, and g77 successfully links:
f90 bubbles1.f90 -lpgplot -lX11 -L /usr/X11R6/lib -YEXT_SFX=_ -YEXT_NAMES=ASIS -lm -lcpgplot /usr/lib/libpgplot.so: undefined reference to `do_lio' /usr/lib/libpgplot.so: undefined reference to `e_wsle' /usr/lib/libpgplot.so: undefined reference to `e_wsfe' /usr/lib/libpgplot.so: undefined reference to `s_rsfe' /usr/lib/libpgplot.so: undefined reference to `s_cmp' /usr/lib/libpgplot.so: undefined reference to `r_lg10' /usr/lib/libpgplot.so: undefined reference to `do_uio' /usr/lib/libpgplot.so: undefined reference to `e_rsfe' /usr/lib/libpgplot.so: undefined reference to `r_mod' /usr/lib/libpgplot.so: undefined reference to `f_inqu' /usr/lib/libpgplot.so: undefined reference to `e_rsue' /usr/lib/libpgplot.so: undefined reference to `i_indx' /usr/lib/libpgplot.so: undefined reference to `do_fio' /usr/lib/libpgplot.so: undefined reference to `e_wsfi' /usr/lib/libpgplot.so: undefined reference to `s_cat' /usr/lib/libpgplot.so: undefined reference to `s_stop' /usr/lib/libpgplot.so: undefined reference to `s_wsfi' /usr/lib/libpgplot.so: undefined reference to `G77_getenv_0' /usr/lib/libpgplot.so: undefined reference to `s_rsue' /usr/lib/libpgplot.so: undefined reference to `f_clos' /usr/lib/libpgplot.so: undefined reference to `f_open' /usr/lib/libpgplot.so: undefined reference to `s_wsle' /usr/lib/libpgplot.so: undefined reference to `s_wsfe' /usr/lib/libpgplot.so: undefined reference to `s_copy' --
