basic-improvements merge status

[Gabriel Dos Reis]

David Edelsohn <dje@watson.ibm.com> writes:

| >>>>> Jan Hubicka writes:
| 
| >> #ifndef HAVE_SINF
| >> float
| >> sinf(float x)
| >> {
| >> return (float) sin(x);
| >> }
| >> #endif
| >> 
| >> is being compiled as
| 
| Jan> I think we can deal with -fno-builtin-fsin to avoid gcc from being
| Jan> active on optimizing this.
| Jan> The name sinf is reserved by C90 standard, so this is not valid C.
| 
| 	Maybe libstdc++-v3/libmath/stubs.c should be compiled with
| -fno-builtins.

This is papering over broken assumptions made by the transformation.

Moreover, not all functions are missing at the same time.  So
-fno-builtin will be overly pessimistic an assumption.  There ought to
be a way to tell the compiler which library function not to optimize.

-- Gaby