help gfortran

mperez · 12-16-2007, 05:06 AM

Hi everyone

I'm trying to compile an old fortran file (.f) with gfortran

gfortran -o k2b1 k2b1

/tmp/ccamVShq.o: In function `MAIN__':
k2b1.f

.text+0x1b9): undefined reference to `julday_'
k2b1.f

.text+0x1d6): undefined reference to `flmoon_'
k2b1.f

.text+0x30d): undefined reference to `flmoon_'
k2b1.f

.text+0x3f5): undefined reference to `caldat_'
collect2: ld returned 1 exit status

can somebody help me?

help!
ps. gfortran -V : 4.2.1 (OpenSuSe10.3)
i was usig the option -ffree-form
-ff2c

Tinkster · 12-16-2007, 11:43 AM

You're referencing a file that defines calendar functions
but aren't linking it to your program.

Cheers,
Tink

colucix · 12-16-2007, 12:50 PM

julday, caldat and flmoon are classic functions of Numerical Recipes in Fortran: you have to compile them and your main program together, by specifying them first on the command line. The compiler will build the functions and then the main program which calls them.