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?
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
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
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