20020924: Unsatisfied UDUNITS symbols when linking readgeneral.f

Hans-Juergen,

>Date: Tue, 24 Sep 2002 11:08:15 +0200 (METDST)
>From: Hans-Juergen Panitz <address@hidden>
>Organization: Institut =?iso-8859-1?Q?f=FCr?= Meteorologie und Klimaforschung
>To: address@hidden
>Subject: Re: 20020923: Unsatisfied UDUNITS symbols when linking readgeneral.f
>Keywords: 200209231227.g8NCRs103672

The above message contained the following:

> thank you for your quick answer. I performed the command you suggested
> for all unsatisfied symbols (The result of the nm command for the
> whole library is attached). The result was:
> 
> $ nm -g /opt/udunits/lib/libudunits.a |grep -i uttime
> uttime_             |      4760|extern|entry  |$CODE$
> $ nm -g /opt/udunits/lib/libudunits.a |grep -i utcaltime
> utcaltime_          |     19120|extern|entry  |$CODE$
> $ nm -g /opt/udunits/lib/libudunits.a |grep -i utopen   
> utopen_             |     11736|extern|entry  |$CODE$
> $ nm -g /opt/udunits/lib/libudunits.a |grep -i utfree
> utfree_             |     19520|extern|entry  |$CODE$
> $ nm -g /opt/udunits/lib/libudunits.a |grep -i utdec 
> utdec_              |     12432|extern|entry  |$CODE$
> $ nm -g /opt/udunits/lib/libudunits.a |grep -i utcaltime
> utcaltime_          |     19120|extern|entry  |$CODE$
> $ nm -g /opt/udunits/lib/libudunits.a |grep -i utmake   
> utmake_             |     19368|extern|entry  |$CODE$
> 
> All symbols are defined it the library but all with an underscore at the end.
> Thus I included the underscore whenever the routines appear in the FORTRAN 
> program.
> 
> Then I performed the following f90-command:
> 
> f90 -o readgeneral  readgeneral.f -L/opt/netcdf/lib -lnetcdf 
> -L/opt/udunits/lib 
> -ludunits
> 
> that lead to the following result:
> 
> readgeneral.f
>    main program 
>    external subroutine GRIDREAD
>    external subroutine UNPACK
>    external subroutine TIMEINDEX
>    external subroutine XHOUR
>    external subroutine UDPARSE
>    external subroutine UDUERR
>    external function NBLEN
> 
> 4069 Lines Compiled
> /usr/ccs/bin/ld: (Warning) At least one PA 2.0 object file (readgeneral.o) 
> was 
> detected. The linked output may not run on a PA 1.x system.
> /usr/ccs/bin/ld: Unsatisfied symbols:
>    ceil (code)
>    floor (code)
>    log10 (code)
>    pow (code)
>    fmod (code)

The above symbols are the names of functions in the Standard C math
library.  They are used by the UDUNITS library.

Try adding a reference to the math library to your link-command.
Typically, the reference is "-lm".  For example

    f90 -o readgeneral  readgeneral.f -L/opt/netcdf/lib -lnetcdf 
-L/opt/udunits/lib -ludunits -lm

Please let me know if this helps.

Regards,
Steve Emmerson   <http://www.unidata.ucar.edu>