R help - Oct 2006 - Linking R with Fortran 90: make: m2c: Command not found

Following the setup in Prof.Duncan Murdoch's page, I have successfully
compiled the DLL for one Fortran 95 program using Gfortran and got 300 times
speed  boost.  For the second set of fortran programs, However, I have this
error message

R CMD SHLIB -o jiangang    kdtree2.f90  jian.f90 gang.f90
m2c    -o jian.o jian.mod
make: m2c: Command not found
make: *** [jian.o] Error 127

Can anyone point me to the direction to solve this problem. Thank you in
advance.
 
Jason Liao, http://www.geocities.com/jg_liaoAssociate Professor of Biostatistics
Drexel University School of Public Health
245 N. 15th Street, Mail Stop 660
Philadelphia, PA 19102-1192
phone 215-762-3934

Why is this an error?

  mat <- matrix(1:64, 8, 8)
  x <- y <- 1:8
  z <- outer(x, y, function(x, y) mat[x,y])

when this is not an error:

  mat <- matrix(1:64, 8, 8)
  x <- y <- 1:8
  z <- outer(x, y, function(x, y) paste("mat[", x, ",",
y, "]", sep=""))

Alberto Monteiro

Jason Liao <jg_liao at yahoo.com> wrote:
> Following the setup in Prof.Duncan Murdoch's page, I have successfully
compiled the DLL for one Fortran 95 program using Gfortran and got 300 times
speed  boost.  For the second set of fortran programs, However, I have this
error message
> 
> R CMD SHLIB -o jiangang    kdtree2.f90  jian.f90 gang.f90
> m2c    -o jian.o jian.mod
> make: m2c: Command not found
> make: *** [jian.o] Error 127
> 
> Can anyone point me to the direction to solve this problem. Thank you in
advance.
>  
As there has been no other answer, I will point something out,
even though I am NOT an expert in this procedure.  m2c is a
compiler for the language Modula-2.  You are not using that (are
you?), but it seems to be invoked (by make) because of your
Fortran module file (jian.mod).  Fortran compilers in my
experience don't need to be told to look for x.mod when you have
specified x.obj.  Can you run this procedure without mentioning
the module file?

I hope this helps.

MHP

-- 
Mike Prager, NOAA, Beaufort, NC
* Opinions expressed are personal and not represented otherwise.
* Any use of tradenames does not constitute a NOAA endorsement.

many Thanks to Mike Prager and José Fernández Menéndez  for your help. I tried
what Mike suggested in various ways but the problem is still there. Jose's
solution worked beautifully in producing a dll. After dyn.load() the dll,
however, is.loaded() gives me a false answer. I still need to investigate this
later part. Progress has been made, nevertheless.

Jason

from http://gcc.gnu.org/wiki/GfortranFAQ:


Gfortran creates a file namemod= for each module name. This confuses the gnu
make, which thinks that .mod
files are Modula2 source code files. You must override this built-in
rule by adding the following line somewhere in your Makefile. 

%.o : %.mod
 
hope this helps!!!



Jason Liao, 
http://www.geocities.com/jg_liaoAssociate Professor of Biostatistics
Drexel University School of Public Health
245 N. 15th Street, Mail Stop 660
Philadelphia, PA 19102-1192
phone 215-762-3934

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