Building R package with .c sub-routine files

Create a file named Makevars in the same directory and put the  
following line in it:

OBJECTS=file1.o

Then R CMD SHLIB will only compile file1.c.

Kjell

Lets say I have two source files  file1.c and file2.c

The latter just contains sub-routines to be used by the first. i.e.  
in file1.c I
have the line

#include "file2.c"

Let's say "R CMD SHLIB file1.c" runs perfectly and I want to  
include the code in
a package, "R CMD build" also runs fine but R CMD check" gives

* checking whether package 'myPackage' can be installed ... ERROR
Installation failed.
See '/pathto/myPackage.Rcheck/00install.out' for details.

basically the compiler is trying to compile file2.c independantly  
of file1.c
which is not what I want and prevents a proper build

What's the easiest way to enforce the correct file dependencies  
when building  R
packages?

cheers
David

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Building R package with .c sub-routine files

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