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Without it, at least on ARM64 with older BFD linker, it will
include the file of the object file (which is of a temporary path)
as a debug symbol into the binary, causing the build to be
nondeterministic. Adding a .file directive makes it to create a
STT_FILE symbol with deterministic input, and prevent the linker
creating one using the temporary object file path.

Fixes #57035.

Change-Id: I3ab716b240f60f7a891af2f7e10b467df67d1f31
Reviewed-by: Bryan Mills <>
TryBot-Result: Gopher Robot <>
Run-TryBot: Cherry Mui <>


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The Go Programming Language

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