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Right now, gold produces errors like warning: while linking my_exe: symbol 'ns::Tpl<Arg>::~Tpl()' defined in multiple places (possible ODR violation): ./path/to/some_header.h:38 ./path/to/other_header.h:490 While trying to figure out why this is happening, I wanted to know which object files those definitions came from. The attached patch changes the output to: warning: while linking my_exe: symbol 'ns::Tpl<Arg>::~Tpl()' defined in multiple places (possible ODR violation): ./path/to/some_header.h:38 from libfoo.a(obj1.o) ./path/to/other_header.h:490 from libfoo.a(obj2.o) where the object file after "from" is an arbitrary object file including that location. This may be spammy in ordinary use, but it should be useful while we iron out the false positives. Jeffrey Yasskin
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