Re: get make error when build gcc-13 on m1 MacOS 13

[Iain Sandoe <iain@sandoe.co.uk>]

> On 14 Jan 2023, at 14:23, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
> 
> On Sat, 14 Jan 2023 at 13:31, 徐保钰 via Gcc-help <gcc-help@gcc.gnu.org> wrote:

>> I want to build gcc-13 on my M1 MacBook Pro. Following official document
>> <https://gcc.gnu.org/install/>, I download source code using git, configure
>> and make.
>> 
>> For configure, I refer to the way of Homebrew configure gcc-12 on link
>> <https://github.com/Homebrew/homebrew-core/blob/master/Formula/gcc.rb>.
> 
> I think Homebrew uses a patched version of GCC, because there are
> changes for M1 support that are not yet available in upstream GCC. So
> the same config used for the Homebrew build will not necessarily work
> for the unpatched upstream sources.

As Jonathan says, the M1 (Arm64 / aarch64) support for macOS is not yet upstreamed.

The prototype / experimental branch is here: https://github.com/iains/gcc-darwin-arm64

I rebase that work from time to time, (should be an update in the next week or so).

NOTE you might run into https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107568 with
the macOS13 SDK - the work-around is to:

 make  BOOT_CFLAGS="-O2 -g -Wno-error=deprecated-declarations” 

(with your -jXX and any other flags you use unchanged)

HTH,
Iain