[R] cross compiling R for Windows under Linux

[Prof Brian Ripley]

*If* you really have the header paths set correctly it does work, and has 
been tested by several people.

Do read MkRules more carefully and think about how your setting differs 
from the example given.  You have *not* as you claim

# Set this to where the mingw32 include files are. It must be accurate.
HEADER=/users/ripley/R/cross-tools4/i586-mingw32/include

if you used my cross-compiler build (and gave no credit).  Hint: float.h 
is a `mingw32 include file'.

As the comment says, user error here is disastrous, so please take the 
hint.

On Thu, 14 Apr 2005, Lars Schouw wrote:

> Hi
>
> I tried to cross compile R under Linux but get an
> error.
>
> i586-mingw32-gcc -isystem
> /home/schouwl/unpack/mingw/include -O2 -Wall -pedantic
> -I../include -I. -DHAVE_CONFIG_H -DR_DLL_BUILD  -c
> dynload.c -o dynload.o
> dynload.c: In function `R_loadLibrary':
> dynload.c:94: warning: implicit declaration of
> function `_controlfp'
> dynload.c:94: error: `_MCW_IC' undeclared (first use
> in this function)
> dynload.c:94: error: (Each undeclared identifier is
> reported only once
> dynload.c:94: error: for each function it appears in.)
> dynload.c:95: warning: implicit declaration of
> function `_clearfp'
> dynload.c:99: error: `_MCW_EM' undeclared (first use
> in this function)
> dynload.c:99: error: `_MCW_RC' undeclared (first use
> in this function)
> dynload.c:99: error: `_MCW_PC' undeclared (first use
> in this function)
> make[3]: *** [dynload.o] Error 1
> make[2]: *** [../../bin/R.dll] Error 2
> make[1]: *** [rbuild] Error 2
> make: *** [all] Error 2
>
>
> This is the that was reported in the mailing list
> before.
> http://tolstoy.newcastle.edu.au/R/devel/04/12/1571.html
>
> I have set the HEADER correct in MkRules

No, you did not.

> HEADER=/home/schouwl/unpack/mingw/include
> The file float.h is located in the
> ../i586-mingw32/include/float.h
> from there.
>
> I am cross compiling R 2.0.1 source code.
>
> Help would be appreciated..


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595