[PATCH] Fix build on Solaris 2.5.1

[Paul Thomas]

Eric,

>has broken the build on SPARC/Solaris 2.5.1 because io/io.h now includes 
>gthr.h, which pulls <pthread.h>.  The problem is that the latter header file 
>defines uint8_t, uint32_t and uint64_t (and only those, not the full C99 set) 
>so they conflict with the last chance definitions in libgfortran.h...
>
>  
>
...and on Cygwin.  I can make, using an existing, recent gcc, but cannot 
bootstrap at all.  The problem is exactly those defines above.

Paul