[patch] PR31546 - add --enable-intermodule

[Paolo Bonzini]

Bernhard Fischer wrote:
> Hi,
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31546#c5
> 
> add option to build libgfortran and fortran with -combine.
> 
> This creates a smaller binary and may also create a faster binary. The
> former is the main motivation from my POV.
> 
> This is completely optional and is not enabled if you do not configure
> gcc with '--enable-intermodule'.

The libgfortran part is ok.  For the front-end part I would like to see 
code size figures too; since the other front-ends do not support it, I 
would prefer to do it for all-or-none (except Ada of course).

Paolo