Thanks Jari and Berend.

I was not aware of that function. I do use it : indeed it may extern 
declarations for Fortran routines. see 
https://r-forge.r-project.org/scm/viewvc.php/pkg/randtoolbox/src/init.c?view=markup&root=rmetrics
 
<https://r-forge.r-project.org/scm/viewvc.php/pkg/randtoolbox/src/init.c?view=markup&root=rmetrics>

However I get a new error when building 

Error: package or namespace load failed for ‘randtoolbox’ in dyn.load(file, 
DLLpath = DLLpath, ...):
 impossible de charger l'objet partagé 
'/Library/Frameworks/R.framework/Versions/3.4/Resources/library/randtoolbox/libs/randtoolbox.so':
  
dlopen(/Library/Frameworks/R.framework/Versions/3.4/Resources/library/randtoolbox/libs/randtoolbox.so,
 6): Symbol not found: _halton_f_
  Referenced from: 
/Library/Frameworks/R.framework/Versions/3.4/Resources/library/randtoolbox/libs/randtoolbox.so
  Expected in: flat namespace
 in 
/Library/Frameworks/R.framework/Versions/3.4/Resources/library/randtoolbox/libs/randtoolbox.so
Erreur : le chargement a échoué
Exécution arrêtée
ERROR: loading failed

Note that I change the name of Fortran routines to halton_f and sobol_f to 
avoid conflict with C version also renamed halton_c and sobol_c.

In the NAMESPACE, I put at the top useDynLib(randtoolbox, .registration = 
TRUE). 

Berend, I do look at your package… I still don’t figure out why it works for 
you!

Regards, Christophe

---------------------------------------
Christophe Dutang
LMM, UdM, Le Mans, France
web: http://dutangc.free.fr <http://dutangc.free.fr/>
> Le 10 mai 2017 à 08:56, Jari Oksanen <jari.oksa...@oulu.fi> a écrit :
> 
> Have you tried using tools:::package_native_routine_registration_skeleton()? 
> If you don't like its output, you can easily edit its results and still avoid 
> most pitfalls.
> 
> Cheers, Jari Oksanen
> ________________________________________
> From: R-devel <r-devel-boun...@r-project.org> on behalf of Berend Hasselman 
> <b...@xs4all.nl>
> Sent: 10 May 2017 09:48
> To: Christophe Dutang
> Cc: r-devel@r-project.org
> Subject: Re: [Rd] registering Fortran routines in R packages
> 
> Christophe,
> 
>> On 10 May 2017, at 08:08, Christophe Dutang <duta...@gmail.com> wrote:
>> 
>> Thanks for your email.
>> 
>> I try to change the name in lowercase but it conflicts with a C 
>> implementation also named halton. So I rename the C function halton2() and 
>> sobol2() while the Fortran function are HALTON() and SOBOL() (I also try 
>> lower case in the Fortran code). Unfortunately, it does not help since I get
>> 
>> init.c:97:25: error: use of undeclared identifier 'halton_'; did you mean 
>> 'halton2'?
>>  {"halton", (DL_FUNC) &F77_SUB(halton),  7},
>> 
>> My current solution is to comment FortEntries array and use 
>> R_useDynamicSymbols(dll, TRUE) for a dynamic search of Fortran routines.
> 
> Have a look at my package geigen and its init.c.
> Could it be that you are missing extern declarations for the Fortran routines?
> 
> 
> Berend
> 
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel


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