[R-pkg-devel] R CMD check warning about .inc files.

Dear All,

Since some C header files in a package I maintain have identical macro
definitions (which have a different meanings, since other macro
definitions differ), I tried to reduce code duplication to split the
common macros into their own files, which don't get #included directly
by any C files. To give a minimal example, in the following two header
files,

BEGIN foo1.h

#define BAR 1
#define BAZ(x) ((x)+BAR)

END foo1.h

BEGIN foo2.h

#define BAR 2
#define BAZ(x) ((x)+BAR)

END foo2.h

BAZ() macro has redundant definition. I'd like to get rid of the code
duplication with the following three files:

BEGIN foo1.h

#define BAR 1
#include "foo_common.inc"

END foo1.h

BEGIN foo2.h

#define BAR 2
#include "foo_common.inc"

END foo2.h

BEGIN foo_common.inc

#define BAZ(x) ((x)+BAR)

END foo_common.inc

However, I get an R CMD check warning of the form

Subdirectory ?src? contains:
  foo_common.inc

Is there a way to tell R CMD check that .inc files are OK? Or, should I
use a different extension? I don't want to use .c, because those files
only contain macros and not anything that compiles to object code, and
I don't want to use .h, because these are not meant to be included as
header files by any C code.

                                        Thank you in advance,
                                        Pavel

--
Pavel Krivitsky
Lecturer in Statistics
National Institute of Applied Statistics Research Australia (NIASRA)
School of Mathematics and Applied Statistics | Building 39C Room 154
University of Wollongong NSW 2522 Australia
T +61 2 4221 3713
Web (NIASRA): http://niasra.uow.edu.au/index.html
Web (Personal): http://www.krivitsky.net/research
ORCID: 0000-0002-9101-3362

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