[swift-users] what is the use of "-frontend" argument to swift?

[Jordan Rose]

Ah, got it. Sorry for being brusque—the question coming in on swift-users rather than swift-dev threw me off. If you need help with tests feel free to ask! (…but probably on swift-dev)

Jordan


> On Dec 5, 2017, at 22:09, Atul Sowani via swift-users <swift-users at swift.org> wrote:
> 
> 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!
> 
> Best regards,
> Atul.
> 
> On Wed, Dec 6, 2017 at 4:16 AM, Jordan Rose <jordan_rose at apple.com <mailto:jordan_rose at apple.com>> wrote:
> -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 docs/Driver.md <https://github.com/apple/swift/blob/master/docs/Driver.md>.
> 
> Jordan
> 
> 
>> On Dec 5, 2017, at 14:23, Kyle Murray via swift-users <swift-users at swift.org <mailto:swift-users at swift.org>> wrote:
>> 
>> Looks like it's an alias for -emit-object:
>> 
>> https://github.com/apple/swift/blob/master/include/swift/Option/Options.td#L576 <https://github.com/apple/swift/blob/master/include/swift/Option/Options.td#L576>
>> 
>> ...which will give an object file as output rather than the default, an executable. 
>> 
>> -Kyle
>> 
>>> On Dec 5, 2017, at 1:49 AM, Atul Sowani via swift-users <swift-users at swift.org <mailto:swift-users at swift.org>> wrote:
>>> 
>>> Hi,
>>> 
>>> 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?
>>> 
>>> Thanks,
>>> Atul.
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