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[SR-10116] Driver does not handle single-file -c -o correctly when doing multiple frontend invocations #52518

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jckarter opened this issue Mar 15, 2019 · 1 comment
Open

[SR-10116] Driver does not handle single-file -c -o correctly when doing multiple frontend invocations #52518

jckarter opened this issue Mar 15, 2019 · 1 comment
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself legacy driver Area → compiler: the integrated C++ legacy driver. Succeeded by the swift-driver project

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@jckarter
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Previous ID SR-10116
Radar None
Original Reporter @jckarter
Type Bug
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, Driver
Assignee None
Priority Medium

md5: 51960b168e9e03fd58eea634ef3c3565

relates to:

  • SR-7704 swiftc -emit-module -c, driver documentation and diagnostics

Issue Description:

If you specify a single-file compilation job that requires multiple frontend invocations, such as swiftc -emit-module-path foo.swiftmodule -c -o foo.o foo.swift to simultaneously emit a module and an object output, then the driver ignores the -o flag. Passing -force-single-frontend-invocation works around this.
@belkadan
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This is not quite a starter bug because the driver's a bit of a thorny mess, but it shouldn't be too hard to find where we decide whether it's okay to use -o to pick the name of an object file or SIL output and count the number of inputs.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself legacy driver Area → compiler: the integrated C++ legacy driver. Succeeded by the swift-driver project
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@jckarter @belkadan