Michael Hudson-Doyle 956e9e6c83 cmd/link: do not add duplicate symbols to Allsym ... When building shared libraries, all symbols on Allsym are marked reachable. What I didn't realize was that this includes the ".dup" symbols created when "dupok" symbols are read from multiple package files. This breaks now because deadcode makes some assumptions that fail for these ".dup" symbols, but in any case was a bad idea -- I suspect this change makes libstd.so a bunch smaller, but creating it was broken before this CL so I can't be sure. This change simply stops adding these symbols to Allsym, which might make some of the many iterations over Allsym the linker does a touch quicker, although that's not the motivation here. Add a test that no symbols called ".dup" makes it into the runtime shared library. Fixes #14841 Change-Id: I65dd6e88d150a770db2d01b75cfe5db5fd4f8d25 Reviewed-on: https://go-review.googlesource.com/20780 Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com> Reviewed-by: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>		2016-03-17 01:15:19 +00:00
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src	cmd/link: allow symbols from .a files to override those from .so files	2016-01-20 19:53:53 +00:00
shared_test.go	cmd/link: do not add duplicate symbols to Allsym	2016-03-17 01:15:19 +00:00