[R-pkg-devel] Including "Rmath.h" in C code for an R package

[Duncan Murdoch]

On 2024-06-02 7:39 p.m., Iris Simmons wrote:
> To avoid the remapping of beta to Rf_beta, you should
> define R_NO_REMAP_RMATH before you include Rmath:
> 
> #define R_NO_REMAP_RMATH
> #include <Rmath.h>

... and then remember to include the "Rf_" prefix on the routines that 
you do want to use.

Duncan Murdoch

> 
> On Sun, Jun 2, 2024, 19:33 Gregory Raskind <graskind1 using gmail.com> wrote:
> 
>> Hi,
>>
>> I'm extending an R package that uses the R C API directly. I'd like to use
>> some distribution functions, so I included the "Rmath.h" header. The issue
>> is that this introduces macros that have unintended consequences for the
>> code. For example, I have a local variable named "beta", which is expanded
>> to "Rf_beta".
>>
>> Is there a way of including the "Rmath.h" header without applying the
>> macros to my code? E.g. if I want to use the beta function, I would use it
>> with "Rf_beta(a,b)", but "beta" would remain my local variable.
>>
>> Thanks for your time!
>>
>> Best,
>> Greg
>>
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>>
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