implementation of DACOSD

i have this error when porting a Fortran program from tru 64 to Linux:

[dma@alhena SIMECAFLD]$ make
f77  long_onde.F -o long_onde.o -c -Wall
long_onde.F: In subroutine `long_onde':
long_onde.F:423: warning:
                            radrad=dacosd(z/rayray) +i
                                   ^
Reference to unimplemented intrinsic `DACOSD' at (^) (assumed EXTERNAL)
long_onde.F:423:
                            radrad=dacosd(z/rayray) +i
                                   ^
Invalid declaration of or reference to symbol `dacosd' at (^) [initially
seen at (^)]
make: *** [long_onde.o] Error 1

i assume this due to dacosd not yet implemented under gcc
(see http://gcc.gnu.org/onlinedocs/gcc-3.4.1/g77/DACosD-Intrinsic.html)

does anyone have an implementation of the function DACOSD ?

in a way as simple as dsind and dcosd can be implemented:

*       *****************************************************************
        real*8 FUNCTION DSIND( angle )
*       *****************************************************************
	implicit none
	real*8 angle
	real*8 pi

	if( angle .eq. 180.0 ) then
	  dsind = 0.
	else
	  pi=acos(0.)*2
	  dsind = dsin( angle * pi / 180.0 )
	endif
	return
	end

*       *****************************************************************
        real*8 FUNCTION DCOSD( angle )
*       *****************************************************************
	implicit none
	real*8 angle
	real*8 pi
	
	if( angle .eq. 90.0 ) then
	  dcosd = 0.
	else if( angle .eq. 270.0 ) then
	  dcosd = 0.
        else	
	  pi=acos(0.)*2
	  dcosd = dcos( angle * pi / 180.0 )
	endif
	return
	end

any help greatly appreciated

Damien
--

Damien MATTEI

email: Damien (dot) Mattei (AT) obs*azur (dot) fr
and replace * with -
.

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