[PATCH fortran] Use fold_build everywhere

[FX Coudert]

> Attached is an updated version of the patch which also modifies the  
> copyright years of the touched files and which fixes a typo I made  
> when I tried to fix formatting in the diff.

My understanding was that the copyright years in the files need to  
include year X iff a release of the codebase is done in year X,  
independently of whether the file was actually modified or not. From  
http://www.gnu.org/prep/maintain/html_node/Copyright-Notices.html:
> To update the list of year numbers, add each year in which you have  
> made nontrivial changes to the package. (Here we assume you're  
> using a publicly accessible revision control server, so that every  
> revision installed is also immediately and automatically  
> published.) When you add the new year, it is not required to keep  
> track which files have seen significant changes in the new year and  
> which have not. It is recommended and simpler to add the new year  
> to all files in the package, and be done with it for the rest of  
> the year.
>

Other than that, the patch is OK. To satisfy my curiosity: I  
sometimes used buildN() instead of fold_buildN() when I know that the  
expression can't be simplified, to avoid extra burden on the middle- 
end, was that wrong or is it just that the benefit is too small to  
notice?

FX
>

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