Building gcc-12 on MacOS Ventura (aarch64)

Building gcc-12 on MacOS Ventura (aarch64)

[Chris Johns]

Hi,

I am sorting out some issues building RTEMS on MacOS including the M processors.
The building gcc-12.2.1 for the few architectures I tested fail with sig faults
in xgcc when building the runtime. I tried arm, aarch64 and sparc. As a result I
wondered about bootstrapping gcc and using that to build the tools rather than
clang from Xcode.

Is aarch64-apple-darwin supported? I am seeing:

*** Configuration aarch64-apple-darwin22.3.0 not supported

Thanks
Chris

Re: Building gcc-12 on MacOS Ventura (aarch64)

[Jonathan Wakely]

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On Fri, 24 Mar 2023, 23:03 Chris Johns, <chris@contemporary.net.au> wrote:

> Hi,
>
> I am sorting out some issues building RTEMS on MacOS including the M
> processors.
> The building gcc-12.2.1 for the few architectures I tested fail with sig
> faults
> in xgcc when building the runtime. I tried arm, aarch64 and sparc. As a
> result I
> wondered about bootstrapping gcc and using that to build the tools rather
> than
> clang from Xcode.
>
> Is aarch64-apple-darwin supported?



No. Iain Sandoe has some personal branches with changes to support it, but
the changes are not in the official gcc repo yet. If you search the
gcc-help@gcc.gnu.org list you'll find links to his code. I think Homebrew
is his patches too.


I am seeing:
>
> *** Configuration aarch64-apple-darwin22.3.0 not supported
>
> Thanks
> Chris
>

Re: Building gcc-12 on MacOS Ventura (aarch64)

[Jonathan Wakely]

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On Fri, 24 Mar 2023, 23:07 Jonathan Wakely, <jwakely.gcc@gmail.com> wrote:

>
>
> On Fri, 24 Mar 2023, 23:03 Chris Johns, <chris@contemporary.net.au> wrote:
>
>> Hi,
>>
>> I am sorting out some issues building RTEMS on MacOS including the M
>> processors.
>> The building gcc-12.2.1 for the few architectures I tested fail with sig
>> faults
>> in xgcc when building the runtime. I tried arm, aarch64 and sparc. As a
>> result I
>> wondered about bootstrapping gcc and using that to build the tools rather
>> than
>> clang from Xcode.
>>
>> Is aarch64-apple-darwin supported?
>
>
>
> No. Iain Sandoe has some personal branches with changes to support it, but
> the changes are not in the official gcc repo yet. If you search the
> gcc-help@gcc.gnu.org list you'll find links to his code. I think Homebrew
> is his patches too.
>

*uses his patches too.


>
> I am seeing:
>>
>> *** Configuration aarch64-apple-darwin22.3.0 not supported
>>
>> Thanks
>> Chris
>>
>

Re: Building gcc-12 on MacOS Ventura (aarch64)

[Chris Johns]

On 25/3/2023 10:07 am, Jonathan Wakely wrote:
> On Fri, 24 Mar 2023, 23:07 Jonathan Wakely, <jwakely.gcc@gmail.com
> <mailto:jwakely.gcc@gmail.com>> wrote:
>     On Fri, 24 Mar 2023, 23:03 Chris Johns, <chris@contemporary.net.au
>     <mailto:chris@contemporary.net.au>> wrote:
> 
>         Hi,
> 
>         I am sorting out some issues building RTEMS on MacOS including the M
>         processors.
>         The building gcc-12.2.1 for the few architectures I tested fail with sig
>         faults
>         in xgcc when building the runtime. I tried arm, aarch64 and sparc. As a
>         result I
>         wondered about bootstrapping gcc and using that to build the tools
>         rather than
>         clang from Xcode.
> 
>         Is aarch64-apple-darwin supported?
> 
>     No. Iain Sandoe has some personal branches with changes to support it, but
>     the changes are not in the official gcc repo yet. If you search the
>     gcc-help@gcc.gnu.org <mailto:gcc-help@gcc.gnu.org> list you'll find links to
>     his code. I think Homebrew is his patches too.
> 
> *uses his patches too.
> 

I tried Iain's repo and it fails in the same way.

I have been building the tools on MacOS for over a decade with just the Apple
base to make sure we have a clean platform without any issues. To do that I
avoid MacPorts and Homebrew. I am fine with our users making use of those
packages however knowing a build works with just the Apple support makes our
support simpler.

Chris

Re: Building gcc-12 on MacOS Ventura (aarch64)

[Stuff Received]

On 2023-03-24 19:51, Chris Johns wrote:
> On 25/3/2023 10:07 am, Jonathan Wakely wrote:
>> On Fri, 24 Mar 2023, 23:07 Jonathan Wakely, <jwakely.gcc@gmail.com
>> <mailto:jwakely.gcc@gmail.com>> wrote:
>>      On Fri, 24 Mar 2023, 23:03 Chris Johns, <chris@contemporary.net.au
>>      <mailto:chris@contemporary.net.au>> wrote:
>>
>>          Hi,
>>
>>          I am sorting out some issues building RTEMS on MacOS including the M
>>          processors.
>>          The building gcc-12.2.1 for the few architectures I tested fail with sig
>>          faults
>>          in xgcc when building the runtime. I tried arm, aarch64 and sparc. As a
>>          result I
>>          wondered about bootstrapping gcc and using that to build the tools
>>          rather than
>>          clang from Xcode.
>>
>>          Is aarch64-apple-darwin supported?
>>
>>      No. Iain Sandoe has some personal branches with changes to support it, but
>>      the changes are not in the official gcc repo yet. If you search the
>>      gcc-help@gcc.gnu.org <mailto:gcc-help@gcc.gnu.org> list you'll find links to
>>      his code. I think Homebrew is his patches too.
>>
>> *uses his patches too.
>>
> 
> I tried Iain's repo and it fails in the same way.
> 
> I have been building the tools on MacOS for over a decade with just the Apple
> base to make sure we have a clean platform without any issues. To do that I
> avoid MacPorts and Homebrew. I am fine with our users making use of those
> packages however knowing a build works with just the Apple support makes our
> support simpler.
> 
> Chris

I am able to build gcc from Iain's repo gcc-darwin-arm64 on an M1 Mini, 
running macos 11.3.1, using the following configuration.  (Change your 
language preferences accordingly.)  I used make -j4.

CC=/opt/homebrew/bin/gcc-12 \
CXX=/opt/homebrew/bin/g++-12 \
../../src/gcc-darwin-arm64/configure \
--prefix=$HOME/gm2/arm64 \
--exec-prefix=$HOME/gm2/arm64 \
--enable-languages=c,c++,m2 \
--with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk \
--with-mpc=/opt/homebrew \
--with-gmp=/opt/homebrew \
--with-mpfr=/opt/homebrew \
--disable-bootstrap \
--enable-threads=posix

However, you must first define HAVE_FCNTL_H to 1 in libiberty/config.h 
(that is missed somehow by configure).

Sincerely,
N.

Re: Building gcc-12 on MacOS Ventura (aarch64)

[Chris Johns]

On 25/3/2023 11:08 am, Stuff Received wrote:
> On 2023-03-24 19:51, Chris Johns wrote:
>> On 25/3/2023 10:07 am, Jonathan Wakely wrote:
>>> On Fri, 24 Mar 2023, 23:07 Jonathan Wakely, <jwakely.gcc@gmail.com
>>> <mailto:jwakely.gcc@gmail.com>> wrote:
>>>      On Fri, 24 Mar 2023, 23:03 Chris Johns, <chris@contemporary.net.au
>>>      <mailto:chris@contemporary.net.au>> wrote:
>>>
>>>          Hi,
>>>
>>>          I am sorting out some issues building RTEMS on MacOS including the M
>>>          processors.
>>>          The building gcc-12.2.1 for the few architectures I tested fail with
>>> sig
>>>          faults
>>>          in xgcc when building the runtime. I tried arm, aarch64 and sparc. As a
>>>          result I
>>>          wondered about bootstrapping gcc and using that to build the tools
>>>          rather than
>>>          clang from Xcode.
>>>
>>>          Is aarch64-apple-darwin supported?
>>>
>>>      No. Iain Sandoe has some personal branches with changes to support it, but
>>>      the changes are not in the official gcc repo yet. If you search the
>>>      gcc-help@gcc.gnu.org <mailto:gcc-help@gcc.gnu.org> list you'll find
>>> links to
>>>      his code. I think Homebrew is his patches too.
>>>
>>> *uses his patches too.
>>>
>>
>> I tried Iain's repo and it fails in the same way.
>>
>> I have been building the tools on MacOS for over a decade with just the Apple
>> base to make sure we have a clean platform without any issues. To do that I
>> avoid MacPorts and Homebrew. I am fine with our users making use of those
>> packages however knowing a build works with just the Apple support makes our
>> support simpler.
>>
>> Chris
> 
> I am able to build gcc from Iain's repo gcc-darwin-arm64 on an M1 Mini, running
> macos 11.3.1, using the following configuration.  (Change your language
> preferences accordingly.)  I used make -j4.
> 
> CC=/opt/homebrew/bin/gcc-12 \
> CXX=/opt/homebrew/bin/g++-12 \
> ../../src/gcc-darwin-arm64/configure \
> --prefix=$HOME/gm2/arm64 \
> --exec-prefix=$HOME/gm2/arm64 \
> --enable-languages=c,c++,m2 \
> --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk \
> --with-mpc=/opt/homebrew \
> --with-gmp=/opt/homebrew \
> --with-mpfr=/opt/homebrew \
> --disable-bootstrap \
> --enable-threads=posix
> 
> However, you must first define HAVE_FCNTL_H to 1 in libiberty/config.h (that is
> missed somehow by configure).

Thanks for this. It was helpful.

I installed homebrew and the `gcc` package and updated the RTEMS RSB to use
homebrew if installed. I can build RTEMS tools:

% /Users/chris/development/rtems/6/bin/sparc-rtems6-gcc --version
sparc-rtems6-gcc (GCC) 12.2.1 20230224 (RTEMS 6, RSB
f0e34eab8bf33b833a7d9d0b2bddd3b89f6d83cb-modified, Newlib 17ac400)
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

% file /Users/chris/development/rtems/6/bin/sparc-rtems6-gcc
/Users/chris/development/rtems/6/bin/sparc-rtems6-gcc: Mach-O 64-bit executable
arm64

This will work for us. Thanks to those who responded.

Chris