Disable sbrk() use in GNU tools.

[brooks]

Summary

We'd like to remove sbrk() eventually so we should stop depending on it.

[emaste]

gnu/usr.bin/binutils/as/config.h

72 ↗

(On Diff #44905)

Should be /* #undef HAVE_SBRK */ for consistency with the other not-defined ones?

[brooks]

gnu/usr.bin/binutils/as/config.h

72 ↗

(On Diff #44905)

That would be more consistent, but all of these are generated files that will never be regenerated and are on the chopping block already.

[emaste]

No objection from me.

[emaste]

Although we still need to make sure that everything still works with this change.

[brooks]

In D16141#342277, @emaste wrote:

Although we still need to make sure that everything still works with this change.

I'll fire off a tinderbox run which should exercise . Do you think this warrants an exp-run as well?

[emaste]

I doubt an exp-run is necessary, as only three binutils are built today, as, ld, objdump (on some subset of architectures), and if anything does break I expect it would most likely be found by tinderbox.

[andrew]

I'm running a tinderbox on ref12-aarch64 with this and an unrelated patch to binutils to test cross building from arm64.

[brooks]

I've finally done a tinderbox run on this with make tinderbox UNIVERSE_TARGET=toolchain JFLAG=-j16. All targets built and compiled things so I think we're ready to go.

[brooks]

• Rebase
• Add /* #undef HAVE_SBRK */ comments.