Re: How to determine what is default x86-64 -march= value for a given release of gcc?

To: Jonathan Wakely <jwakely.gcc@xxxxxxxxx>
Subject: Re: How to determine what is default x86-64 -march= value for a given release of gcc?
From: Bradley Lucier via Gcc-help <gcc-help@xxxxxxxxxxx>
Date: Mon, 23 Sep 2024 19:53:23 -0400
Cc: lucier@xxxxxxxxxx, Alexander Monakov <amonakov@xxxxxxxxx>, gcc-help@xxxxxxxxxxx
In-reply-to: <86f6ee92-17d9-4afd-a3a5-5685e5bd74c0@purdue.edu>
References: <c72c1e0e-a57f-4621-bbe6-f28e97405bcd@purdue.edu> <743c92a4-1f14-1add-6aa8-bcd1964f9451@ispras.ru> <c36ae208-53a5-48da-bcdc-7fa95978edce@purdue.edu> <CAH6eHdQsOmHU0U2RnMMM-hjeOh69GYOmFprfj64QTrX5UZXgqA@mail.gmail.com> <86f6ee92-17d9-4afd-a3a5-5685e5bd74c0@purdue.edu>
Reply-to: Bradley Lucier <lucier@xxxxxxxxxx>
User-agent: Mozilla Thunderbird

On 9/23/24 15:26, Bradley Lucier wrote:

Is there a way to test in the C source whether the architecture you'recompiling for has a specific instruction?


OK, I understand now, there should be some type of configure test for this.

Thanks again for the explanations.

Brad

References:
- How to determine what is default x86-64 -march= value for a given release of gcc?
  - From: Bradley Lucier via Gcc-help
- Re: How to determine what is default x86-64 -march= value for a given release of gcc?
  - From: Alexander Monakov
- Re: How to determine what is default x86-64 -march= value for a given release of gcc?
  - From: Bradley Lucier via Gcc-help
- Re: How to determine what is default x86-64 -march= value for a given release of gcc?
  - From: Jonathan Wakely via Gcc-help
- Re: How to determine what is default x86-64 -march= value for a given release of gcc?
  - From: Bradley Lucier via Gcc-help