Boostrap fails on i386-pc-solaris2.10 - libquadmath error

[Tobias Burnus]

Rainer Orth wrote:
> While the build completed with the patch I've posted, fortran testing
> for the non-default multilib is completely broken, e.g.

That's in a way the a duplicate of PR 46516. Or at least the solution is 
similar: Getting rid of libgfortran.spec and fall back (again) to having 
the compiler itself adding the "-lquad". The only difficulty is: Having 
__float128 is not sufficient, one also needs to have some support 
libgcc. Thus, one needs to sort out how this is handled in gcc - and in 
particular in libgcc/config.host and gcc/config.gcc.

Tobias,
who disliked the solution of using libgfortran.spec with all the issues 
it caused.