Andreas Wittmann wrote:
Hello Dirk,
thank you for your chick answer.
I tried another file and there it works. so i removed all files
which were created during of the compilation of add.c in windows
and so i could compile it under ubuntu too. During the windows
compilation there is some *.o file which is created during the
compilation, if i delete it and try the compilation under ubuntu
everything works fine, don't know why?
The object files produced during a Windows build won't work on a
different target system. There's a --preclean option to R CMD SHLIB and
R CMD INSTALL that will remove products of earlier builds; it's a good
idea to use it when you start compiling for a new system.
Duncan Murdoch
best regards
Andreas
Dirk Eddelbuettel wrote:
On Sun, Oct 19, 2008 at 01:27:06AM +0200, Andreas Wittmann wrote:
Dear R useRs,
on ubuntu 8.04 i try to create a shared object out of a c-file
this is
// add.c
#include <Rinternals.h>
SEXP addiere(SEXP a, SEXP b)
{
int i, n;
n = length(a);
for (i = 0; i < n; i++)
REAL(a)[i] += REAL(b)[i];
return(a);
}
in terminal i type
R CMD SHLIB add.c
and get
gcc -std=gnu99 -shared -o add.so add.o -L/usr/lib/R/lib -lR
add.o: file not recognized: File format not recognized
my gcc version is 4.2.3 and my R version is 2.7.2.
I can't replicate that on Ubuntu 8.04:
[EMAIL PROTECTED]:/tmp$ R CMD SHLIB add.c
gcc -std=gnu99 -I/usr/share/R/include -fpic -g -O2 -c add.c -o add.o
gcc -std=gnu99 -shared -o add.so add.o -L/usr/lib/R/lib -lR
[EMAIL PROTECTED]:/tmp$
Works fine here. Have you compiled other files? Or are you maybe
missing some -dev packages?
Dirk
Searching R-help, Writing R Extensions and R Installation and
Administration guide
i don't get any idea whats wrong here?
Creating a dll-file on windows xp with the same c-file works fine.
best regards
Andreas
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and provide commented, minimal, self-contained, reproducible code.
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and provide commented, minimal, self-contained, reproducible code.
