[patch, build] Restore bootstrap in building libcc1 on darwin

[Rainer Orth]

FX <fxcoudert@gmail.com> writes:

>> The default BOOT_CFLAGS are: -O2 -g -mdynamic-no-pic
>> the libiberty pic build appends: -fno-common (and not even -fPIC) [NB
>> -fPIC _won't_ override -mdynamic-no-pic, so that's not a simple way out]
>> This means that the PIC library is being built with non-pic relocs.
>
> config/mh-darwin says that -mdynamic-no-pic is there because it “speeds
> compiles by 3-5%”. I don’t think we care about speed when the bootstrap
> fails, so can we remove it altogether?

Darwin/i686 still doesn't bootstrap without this patch, I believe.
Shouldn't it be applied to trunk before GCC 5 ships, rather than leaving
that target broken?

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University