DL Fortran code - cannot resolve symbol c_abs or c_sqrt

[john]

I fear this to be a previously asked question; but I can't find an
answer...
 
I'm attempting to make a dynamically loadable Airy function for complex
arguments. I get some fortran code from NETLIB, copy a bit of C++ to do
the wrapping and compile with the command:

            mkoctfile airy.cc cairy.f

When I try to execute it I get

            octave> airy(-1+i)
            octave: can't resolve symbol 'c_sqrt'

Is there an improved rune with which to compile the code?
Should a fortran library be mentioned somewhere? Or does it come
automatically with Octave?

I'd be grateful for any hints.
         John Smith


My system is thus:
Configuration (please do not edit this section):
-----------------------------------------------

uname output:     Linux arrows 2.0.0 #1 Mon Jun 10 21:11:56 CDT 1996 i586
configure opts:   --enable-shared
Fortran compiler: g77
FFLAGS:           -O
F2C:              
F2CFLAGS:         
FLIBS:            -lf2c -lm -L/usr/lib/gcc-lib/i486-linux/2.7.2
-L/usr/i486-linux/lib -lm
CPPFLAGS:         
INCFLAGS:         -I/usr/local/include -I/usr/local/include/octave-2.0.13
C compiler:       gcc, version 2.7.2
CFLAGS:           -DHAVE_CONFIG_H -mieee-fp -g -O2 -Wall
CPICFLAG:         -fPIC
C++ compiler:     c++, version 2.7.2
CXXFLAGS:         -DHAVE_CONFIG_H -mieee-fp -fno-rtti
-fno-implicit-templates -g -O2 -Wall
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