How to Use the Sun Fortran Library

Question

I wish to use the Sun Fortran Library of functions, but I am having trouble compiling my program. I would appreciate some help on selecting the proper compiler options, code modifications, etc.
My OS is Fedora 10 on a 64-bit system. I use the latest Sun Studio Express. I have used the Sun f95 compiler for quite some time as well, but this is my first use of one of the functions from the Sun Fortran Library.
Here is my first attempt after doing some unsuccessful research of my own on this issue:
PROGRAM test
IMPLICIT NONE
REAL*8 x, y
REAL*8, EXTERNAL :: d_lgamma
x=2.0
y=d_lgamma(x)
y=EXP(y)
WRITE(*,*) x, y
END PROGRAM test
Here's how I tried to compile:
f95 -lm test.f95test.o: In function `MAIN_':
test.f95:(.text+0x91): undefined reference to `d_lgamma_'
Obviously I am not doing this correctly. Is it possible that the Sun compiler and libraries have not been installed correctly on my system? How can I test if this is case?
Thank you for your help with this matter.

Answer 1

The routine d_lgamma_ is not supplied as part of Sun's Fortran product.
Sun's Fortran team does not maintain the library that contains that
routine. The team that does support the library has not yet ported it to
Linux. Different teams have different priorities.
In this case, there is a simple workaround. The C routine
#include <math.h>
double
d_lgamma_(double *x)
return (lgamma(*x));
implements the routine d_lgamma_.
Bob Corbett