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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>If you compile with the -v option you’ll see how -frontend is used, (below, with some comments by me):<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>frank@DESKTOP-6Q7P3OK:~/src/swift$ swiftc -v -module-name CTest CTest.swift ../c/CTest.o<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>Swift version 4.0.2 (swift-4.0.2-RELEASE)<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>Target: x86_64-unknown-linux-gnu<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>Compile:<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>/home/frank/swift-4.0.2-RELEASE-ubuntu16.04/usr/bin/swift -frontend -c -primary-file CTest.swift -target x86_64-unknown-linux-gnu -disable-objc-interop -color-diagnostics -module-name CTest -o /tmp/CTest-f4b853.o<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>Extract “autolink data”:<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>/home/frank/swift-4.0.2-RELEASE-ubuntu16.04/usr/bin/swift-autolink-extract /tmp/CTest-f4b853.o ../c/CTest.o -o /tmp/CTest-8bd3ee.autolink<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>Link:<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Courier New"'>/usr/bin/clang++ -fuse-ld=gold -target x86_64-unknown-linux-gnu -Xlinker -rpath -Xlinker /home/frank/swift-4.0.2-RELEASE-ubuntu16.04/usr/lib/swift/linux /home/frank/swift-4.0.2-RELEASE-ubuntu16.04/usr/lib/swift/linux/x86_64/swift_begin.o /tmp/CTest-f4b853.o ../c/CTest.o -L /home/frank/swift-4.0.2-RELEASE-ubuntu16.04/usr/lib/swift/linux -lswiftCore --target=x86_64-unknown-linux-gnu @/tmp/CTest-8bd3ee.autolink /home/frank/swift-4.0.2-RELEASE-ubuntu16.04/usr/lib/swift/linux/x86_64/swift_end.o -o CTest<o:p></o:p></span></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a name="_MailEndCompose"><o:p> </o:p></a></p><span style='mso-bookmark:_MailEndCompose'></span><p class=MsoNormal><b>From:</b> swift-users-bounces@swift.org [mailto:swift-users-bounces@swift.org] <b>On Behalf Of </b>Atul Sowani via swift-users<br><b>Sent:</b> Tuesday, December 5, 2017 11:10 PM<br><b>To:</b> swift-users@swift.org<br><b>Subject:</b> Re: [swift-users] what is the use of "-frontend" argument to swift?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Thanks Kyle and Jordan! That's the information I was looking for. Anyway I am not using these options explicitly, but found that they are invoked while Swift test suite is run. A few test cases are failing for me on ppc64le and while analyzing it I came across these options. Thanks for the info!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Best regards,<o:p></o:p></p></div><div><p class=MsoNormal>Atul.<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Dec 6, 2017 at 4:16 AM, Jordan Rose <<a href="mailto:jordan_rose@apple.com" target="_blank">jordan_rose@apple.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal>-c is an alias for -emit-object. -frontend is "magically start talking to Swift's implementation details" and you shouldn't use it. More info in <a href="https://github.com/apple/swift/blob/master/docs/Driver.md" target="_blank">docs/Driver.md</a>.<o:p></o:p></p></div><div><p class=MsoNormal><span style='color:#888888'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'>Jordan<o:p></o:p></span></p></div><div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Dec 5, 2017, at 14:23, Kyle Murray via swift-users <<a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Looks like it's an alias for <span style='font-family:"Menlo",serif'>-emit-object</span>:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="https://github.com/apple/swift/blob/master/include/swift/Option/Options.td#L576" target="_blank">https://github.com/apple/swift/blob/master/include/swift/Option/Options.td#L576</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>...which will give an object file as output rather than the default, an executable. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>-Kyle<o:p></o:p></p><div><p class=MsoNormal><br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Dec 5, 2017, at 1:49 AM, Atul Sowani via swift-users <<a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>Hi,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>What is the purpose of "-frontend -c" arguments of swift? I tried "swift --help" but that does not mention it. Also I couldn't find it easily in any swift documents. Can somebody kindly let me know the purpose of these arguments?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal>Atul.<o:p></o:p></p></div></div><p class=MsoNormal>_______________________________________________<br>swift-users mailing list<br><a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a><br><a href="https://lists.swift.org/mailman/listinfo/swift-users" target="_blank">https://lists.swift.org/mailman/listinfo/swift-users</a><o:p></o:p></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal>_______________________________________________<br>swift-users mailing list<br><a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a><br><a href="https://lists.swift.org/mailman/listinfo/swift-users" target="_blank">https://lists.swift.org/mailman/listinfo/swift-users</a><o:p></o:p></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>