[fortran,patch] Add SELECTED_CHAR_KIND intrinsic

[FX]

> The patch is OK, however, it took me a while to correctly read:
>
>   +  len = (alen > blen) ? alen : blen;
>
> I somehow read:   len = MIN(alen,blen)  instead of  MAX(...)
>
> I therefore wonder whether one should add a comment somewhere.

Or I can make it len = MAX(alen, blen). (MAX is defined as a macro in  
gcc/system.h) That's what I committed.

Regtesting on x86_64-linux showed that I had once again forgotten to  
add the new symbol to gfortran.map, so I committed with the following  
chunk added:

--- trunk/libgfortran/gfortran.map	2008/04/30 21:42:24	134838
+++ trunk/libgfortran/gfortran.map	2008/04/30 21:45:02	134839
@@ -1037,6 +1037,7 @@
      _gfortran_erfc_scaled_r8;
      _gfortran_erfc_scaled_r10;
      _gfortran_erfc_scaled_r16;
+    _gfortran_selected_char_kind;
      _gfortran_st_wait;
  } GFORTRAN_1.0;


>

Thanks Tobias for the very quick review!

FX

-- 
François-Xavier Coudert
http://www.homepages.ucl.ac.uk/~uccafco/