Build GCC with -Os for multi libs

[Kai Ruottu]

Sebastian Huber wrote:
> Hi,
>
> normally the GCC multi libs (libc, libgcc, libstdc++ for the target) are built
> with the optimization level -O2. How can I change this to -Os?
>   

Either :

1. Setting things like CFLAGS in environment before writing 'configure'

Or if this is too late, already configured :

2. Editing the produced Makefile(s) before writing 'make', searching for 
all the *FLAGS defined in it/them.