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cmd/link: split text sections for arm 32-bit
This CL is a roll-forward (tweaked slightly) of CL 467715, which turned on text section splitting for GOARCH=arm. The intent is to avoid recurrent problems with external linking where there is a disagreement between the Go linker and the external linker over whether a given branch will reach. In the past our approach has been to tweak the reachability calculations slightly to try to work around potential linker problems, but this hasn't proven to be very robust; section splitting seems to offer a better long term fix. Fixes #58425. Change-Id: I7372d41abce84097906a3d0805b6b9c486f345d6 Reviewed-on: https://go-review.googlesource.com/c/go/+/531795 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
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