Re: [PATCH 06/12] use a shell function for _AC_CHECK_HEADER_MONGREL

[Paolo Bonzini]

> AC_CHECK_HEADERS invokes a shell for loop on 
> the variable ac_header, which it then reads after the expansion of 
> AC_CHECK_HEADER has executed; but here you are assigning into it 
> (fortunately, 
> you are reassigning the value it already had).  But what's wrong with using
> $[]2 instead of $ac_header?

I was not sure whether we accepted shells that did not save positional
parameters, but we actually don't.  I will redo patches 7-12 to apply
the tricks you did (body function, no repeated AS_VAR_PUSHDEF) and not
save arguments into variables.

> Meanwhile, before I actually work on this patch, I noticed a small 
> optimization 
> that I will be applying soon:

Is this really worth it?...

Paolo