From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Arthur Miller Newsgroups: gmane.emacs.devel Subject: Re: Q: What is default architecture for code produced by native compiler? 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envelope-from=arthur.miller@live.com; helo=EUR01-VE1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:272937 Archived-At: Andrea Corallo writes: > Arthur Miller writes: > >> Just wonder, is it generic x86 or something later or does it uses >> native for architecture and cpu flags (-march=native and -mcpu=native)? > > I'd say is GCC's default. > >> If it is generic, do we have option to pass in arch and cpu flags? > > No we don't, even if we could expose it using > 'gcc_jit_context_add_command_line_option' for non obsolete versions of > GCC. > > Regards > > Andrea I am sorry to bother, but I have just seen: (defcustom native-comp-driver-options nil "Options passed verbatim to the native compiler's back-end driver. Note that not all options are meaningful; typically only the options affecting the assembler and linker are likely to be useful. Passing these options is only available in libgccjit version 9 and above." :type '(repeat string) ; FIXME is this right? :version "28.1") I have tested with: (setq native-comp-driver-options '("-march=native" "-mcpu=native")) but I see no difference in emitted code when I dissaemble produced binaries.