[Rd] compiling R under cygwin

[Denham Robert]

For various reasons, it suits our workplace to have a cygwin version of
R.  I am pretty sure that cygwin is still not a supported environment
for R, but we have managed to compile R-2.5.1 under cygwin without too
many dramas.  Our procedure is described below.  We still have a few
problems compiling libraries without manually changing files from .so to
.dll, but it seems ok.
 
I was wondering whether this information is likely to be useful to
others, and if we should spend any time looking in to ways in which the
configure/build/install code could be modified to allow a standard
install.
 
Notes on building R under cygwin:
 
export FFLAGS=-O3
export CFLAGS=-O3
export CXXFLAGS=-O3
export OBJCFLAGS=-O3
export FCFLAGS=-O3
export LDFLAGS='-lblas -lg2c -lintl'
 
export R_OSTYPE=unix
 
./configure --prefix=/opt/freeware/R/R-2.5.1 \
--with-tcl-config=/usr/lib/tclConfig.sh \
--with-tk-config=/usr/lib/tkConfig.sh \
--with-blas=-lblas \
--with-lapack=-llapack \
--enable-R-shlib
 
comment out Win32 in src/include/config.h and set Unix to 1, change .so
to .dll. change .so to .dll and in Makeconf.
in src/extra/xdr/rpc/types.h comment out defn of malloc.
 
Change .so to .dll in Makefile's
 
edit Makeconf and set R_OSTYPE to unix
 
make -j2
 
when blas doesn't link, re-run command with -lblas -lg2c on end and
change output to .dll
 
edit Rstrptime.c and change wcstod to atof.
 
in modules:
when X11 and internet falls over add -lintl to link line. add -lg2c and
-lblas to lapack
 
comment out library/base/R/library.R lines 47-51 to avoid arch check
which seems to go wrong!
 
make -j2
make install
 
edit  /opt/freeware/R/R-2.5.1/lib/R/etc/Makeconf and add '-lintl -lg2c
-lblas' to the end of ALL_LIBS
so the module building works. Change .so to .dll also
(can't see how to to this for the build tho...)
 

Our cygwin info is:
             sysname              release              version 
     "CYGWIN_NT-5.1" "1.5.20s(0.155/4/2)"  "20060527 19:21:22" 


 
 
Robert Denham
Environmental Statistician
Remote Sensing Centre
Telephone 07 3896 9899 
www.nrw.qld.gov.au <http://www.nrw.qld.gov.au/> 
 
Department of Natural Resources & Water
QScape Building, 80 Meiers Road, Indooroopilly Qld 4068

************************************************************************
The information in this email together with any attachments is
intended only for the person or entity to which it is addressed
and may contain confidential and/or privileged material.
Any form of review, disclosure, modification, distribution
and/or publication of this email message is prohibited, unless
as a necessary part of Departmental business.
If you have received this message in error, you are asked to
inform the sender as quickly as possible and delete this message
and any copies of this message from your computer and/or your
computer system network.