[Rd] building a libR.a for BlueGene/L

[Hin-Tak Leung]

Quoting the last few lines of config.log is not useful - you need to 
post the whole of it (or let it be downloaded from somewhere), since the
error is a good deal further up.

The error and fix is as it says - it seems that your fortran compiler
(blrts_xlf) disagree with your C compiler (blrts_xlf) about how big
is int and double (On most usual boxes these days int is 32-bit and
double is 64-bit), and you will need to read your compiler's manual
about what size are used for int and double accordingly; this is highly
compiler-specific so you'll have to read it up yourself.

Sean Hill wrote:
> We would like to compile a minimal R library that could be linked  
> into an application that will be run on a BlueGene/L system with  
> 8,192 processors. This is a system that requires no shared libraries,  
> no graphical interface, must be single threaded, and will be cross- 
> compiled.  I would statically link the code for the packages we require.
> 
>  From looking through the code, it seems like it should be possible  
> to build such a version.  However, it would be invaluable to have the  
> advice and aid of the people who truly know this software.
> 
> Thus far, I have configured the build to use the appropriate  
> compilers.  I had to tell configure that it was crosscompiling by  
> editing the config.site file (it didn't recognize that it was).   
> However, I am currently hitting a roadblock with configure failing  
> with the report:
> WARNING: blrts_xlf and blrts_xlc disagree on int and double
> configure: error: Maybe change CFLAGS or FFLAGS
> 
> The last lines in config.log are:
> #ifdef __cplusplus
> extern "C" void exit (int) throw ();
> 
> configure: exit 1
> 
> Thank you very much for any assistance,
> Best
> Sean
> 
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