[PATCH] fortran/29147 -- Disable integer range checking.

[Brooks Moses]

Steve Kargl wrote:
> The -frange-check option is documented in invoke.texi.
> Jerry implemented the option to permit Inf and NaN 
> to be computed (e.g., "real :: x = 1. / 0.").  During
> constant folding, the Inf would trigger an overflow
> error. 
> 
> There is a section in gfortran.texi that describes 
> gfortran-specific extensions involving BOZ constants.
> You may want to read this text and perhaps add a blurb
> about -fno-range-check.

The attached patch includes the relevant documentation changes in both 
locations.  I've tested it on both PDF and HTML document generation.

- Brooks

(Note that I don't have commit privileges; could the approver please 
commit this for me?)
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