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

[Richard Biener]

On Thu, Dec 4, 2014 at 2:52 PM, FX <fxcoudert@gmail.com> wrote:
>> 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?

Can you try adding it as

T_CFLAGS += -mdynamic-no-pic

in gcc/config/t-tarwin instead?

> FX
>
>