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3c029ebd3f
We changed to `llvm.compiler.used` because of the behaviour of `gold`, which refuses to coalesce sections that have different `SHF_GNU_RETAIN` flags, which causes problems with metadata. Originally I thought we were going to have to generate two sections with distinct names and have the runtime look for both of them, but it turns out that the runtime only wants to see sections that have `SHF_GNU_RETAIN` in any case. It's really the reflection code that is interested in being able to see non-retained sections. The upshot is that we don't need to use `llvm.compiler.used`; it's just fine if we have duplicate sections, as long as the reflection code looks for them when it's inspecting an ELF image. This also means we no longer need to pass `-z nostart-stop-gc` to the linker if we're using `lld`. rdar://123504095
19 lines
862 B
Swift
19 lines
862 B
Swift
// RUN: %swiftc_driver -emit-ir %s -o - -Xfrontend -disable-implicit-concurrency-module-import -Xfrontend -disable-implicit-string-processing-module-import | %FileCheck %s -check-prefix ELF
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// Check that the swift auto link section is available in the object file.
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// RUN: %swiftc_driver -c %s -o %t -Xfrontend -disable-implicit-concurrency-module-import
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// RUN: llvm-readelf %t -S | %FileCheck %s -check-prefix SECTION
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// Checks that the swift auto link section is removed from the final binary.
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// RUN: %swiftc_driver -emit-executable %s -o %t -Xfrontend -disable-implicit-concurrency-module-import
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// RUN: llvm-readelf %t -S | %FileCheck %s -check-prefix NOSECTION
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// REQUIRES: OS=linux-gnu
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print("Hi from Swift!")
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// ELF: @llvm.used = {{.*}}ptr @_swift1_autolink_entries
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// SECTION: .swift1_autolink_entries
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// NOSECTION-NOT: .swift1_autolink_entries
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