[R] Trying to build R sources on Windows

[Bill Northcott]

I am trying without success to build the R-2.1.0 sources on Windows  
2003 server.

I have MinGW/bin in front of cygwin/bin in the Windows path.

However, I try to build, I get failures trying to include headers  
which are not part of MinGW.  I am definitely using the MinGW  
compilers, so why are the sources trying to access headers which are  
not included?

Examples would be:
argz.h included from l10nflist.c
alloca.h from errors.c
langinfo.h from main.c

Any clues about what I am doing wrong?

Bill Northcott