Re: [Rd] compiling R under cygwin

From: Duncan Murdoch <murdoch_at_stats.uwo.ca>
Date: Tue, 21 Aug 2007 06:52:56 -0400

Denham Robert wrote:
> 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 would expect other subtle problems as well, because Cygwin is not a normal Unix. I don't know whether any of these differences matter to R, but some things to look out for are:

Duncan Murdoch
>
> 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
>

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