[R] Step by step: Making an R package with Fortran 95
sjnovick at yahoo.com
Fri May 22 14:18:47 CEST 2009
To all. I need your help. The big question is: How do I make an R library
with Fortran 95 files? You may assume that I am a pretty decent programmer
in both R and Fortran. I lay out a scenario and need your help!
I know how to make an ordinary R package and have dabbled with R + Fortran
95 *.dll linking. I do not have a great handle on the whole Makevars file
and whatever else I might need to get things working to build a new R
package. By the way, I'm using R 2.8.1 and Windows XP (and sometimes
Let's take this simple situation. Suppose I'm using Windows XP and place
the Folder for the package "Testme" in C:\Program
Files and folders:
DESCRIPTION file -- I understand this file
NAMESPACE file: This one has the contents
man directory: I put my *.Rd files here. I understand this part.
R directory: I put my *.R files here. One of these files calls upon a
Fortran 95 subroutine with
I understand this part.
src directory: I put my *.f95 files here. Also, I put a Makevars file
Suppose that I have two *.f95 files, named CalculatorModule.f95 and
CalculatorModule.f95 contains a Fortran 95 module.
ANiceSubroutine.f95 uses the functions in
Calculator.Module.f95 with the "USE" command. To be consistent with my R
file (above), ANiceSubroutine.f95 contains the subroutine: "MySubroutine".
Finally: I issue the command from a DOS Shell in the directory C:\Program
This results in errors.
Here are the problems:
1. The order of compilation must be f95 -c CalculatorModule.f95
ANiceSubroutine.f95. Unfortunately, R compiles them alphabetically. So, I
was given errors making the *.o files.
I overcame this problem by renaming the files
a01.CalculatorModule.f95 and a02.ANiceSubroutine.f95. I would rather not
have to name the files this way if I don't have to! When I did this, R
compiled the Fortran files in the correct order, but I still have errors.
2. Here was the error output. Help?????
C:\Program Files\R\R-2.8.1\src\gnuwin32>make pkg-Testme
---------- Making package Testme ------------
adding build stamp to DESCRIPTION
installing NAMESPACE file and metadata
making DLL ...
"g95" -O3 -c a01.CalculatorMod.f95 -o a01.CalculatorMod.o
"g95" -O3 -c a02.ANiceSubroutine.f95 -o a02.ANiceSubroutine.o
windres --preprocessor="gcc -E -xc -DRC_INVOKED" -I
de -i Testme_res.rc -o Testme_res.o
"g95" -shared -s -o Testme.dll Testme.def a01.CalculatorMod.o
Testme_res.o -LC:/PROGRA~1/R/R-28~1.1/bin -lR
ld: Testme.def:6: syntax error
ld:Testme.def: file format not recognized; treating as linker script
ld:Testme.def:2: syntax error
make: *** [Testme.dll] Error 1
make: *** [srcDynlib] Error 2
make: *** [all] Error 2
make: *** [pkg-Testme] Error 2
Thanks for helping!!! :)
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