Re: [Plplot-general] f95-support

[Alan W. I. <ir...@be...>]

On 2006-05-15 14:20+0900 Valery Pipin wrote:

> After export F77=3Dgfortran export FC=3Dgfortran and
> export F77FLAGS=3D'-O3' export FCFLAGS=3D'-O3'
>
> I've get
> /bin/sh ../../libtool --mode=3Dcompile gfortran -I. -O3 -c -o sfstubsf95.=
lo
> sfstubsf95.f95
> gfortran -I. -O3 -c sfstubsf95.f95  -fPIC -o .libs/sfstubsf95.o
> In file sfstubsf95.f95:69
>
>      module plplot
>                  1
> In file sfstubs.f95:227
>
>     Included at sfstubsf95.f95:66
>
>      common /plplot/ tr
>                    2
> Error: Global name 'plplot' at (1) is already being used as a COMMON at (=
2)
> make[4]: *** [sfstubsf95.lo] =EF=DB=C9=C2=CB=C1 1
>
> Then I replaced the corresponding  name of common block in   sfstubs.f95
> from  common /plplot/ to  common /plplot1/.
> After this compilation and checks  for f95 goes smoothly.

Good.  That makes four (actually probably five) platforms where gfortran is
working.  I have just now put in a similar fix for the nameclash into CVS i=
n
response to somebody else's report on the plplot-devel list.  When it
becomes available for anon cvs (bindings/f95/sfstubs.f and some of the
fortran 95 examples should change), please try it out.

> The common blocks is obsolete in F90-95. I would recommend to  use
> "USE" .

Noted, but not implemented yet.  I would like to change this whole area of
the API to use proper callbacks (where the API of the function or subroutin=
e
name being passed as an argument of the library routine is fully specified)=
=2E
Is this C-like approach available in fortran 95 (perhaps with the interface
statement)?  If so, then a number of different routines (e.g., plcon0,
plcon1, etc) could be replaced by one routine (plcont) in the fortran 95
interface, and there will be no more need for the common block.

> This experiment was on altlinux where we have gfortran-4.1.  I shall chec=
k my
> dapper part this afternoon.
>
> For intel fortran I've get the linkage error:
> /bin/sh ../../libtool --mode=3Dlink ifort -I. -O3   -o
=2E...

I don't want to discourage you; your experiments with ifort may eventually
pay off.  However, from what I have heard from the libtool experts, we are
limited to just gfortran for now because libtool is not yet ready for full
fortran 9x support.  Once libtool is improved in this respect (hopefully
within a few months from now), then the plplot fortran 95 interface should
be able to support commercial fortran compilers such as ifort, pgf90, and
the absoft fortran compiler.

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the
Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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Linux-powered Science
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