[PATCH, M2] introduction of --enable-libm2 in top level directory

[Gaius Mulley]

"Joseph S. Myers" <joseph@codesourcery.com> writes:

> On Tue, 19 Nov 2013, Gaius Mulley wrote:
>
> We don't use --enable-<library> options like that.  Instead:
>
> (a) The front end's config-lang.in file sets target_libs, thereby causing 
> the library to be disabled if the language is.  Of course this means you 
> don't actually add the library before the front end - but these build 
> rules are harmless in the absence of the library directory.  (In some 
> cases, additional toplevel logic is needed - see how libitm etc. are 
> disabled when C++ isn't built - but that shouldn't be relevant here.)

ok thanks for directions - I'll resubmit these patches when the front
end is in the tree.

regards,
Gaius