2f0828ef7c
The ptrto field of the type data cannot be relied on when dynamic linking: a type T may be defined in a module that makes no use of pointers to that type, but another module can contain a package that imports the first one and does use *T pointers. The second module will end up defining type data for *T and a type.*T symbol pointing at it. It's important that calling .PtrTo() on the refect.Type for T returns this type data and not some synthesized object, so we need reflect to be able to find it! Fortunately, the reflect package already has a mechanism for doing this sort of thing: ChanOf/MapOf/etc look for pre-existing type data by name. So this change just extends PtrTo() to consult this too, and changes the compiler to include pointer types in the data consulted when compiling for dynamic linking. Change-Id: I3773c066fd0679a62e9fc52a84bf64f1d67662b7 Reviewed-on: https://go-review.googlesource.com/8232 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> |
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The Go Programming Language
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
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See https://golang.org/doc/install or doc/install.html for more details.