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e648c96c5f
Rust's current compilation model makes it impossible on Windows to generate one object file with a complete and final set of dllexport annotations. This is because when an object is generated the compiler doesn't actually know if it will later be included in a dynamic library or not. The compiler works around this today by flagging *everything* as dllexport, but this has the drawback of exposing too much. Thankfully there are alternate methods of specifying the exported surface area of a dll on Windows, one of which is passing a `*.def` file to the linker which lists all public symbols of the dynamic library. This commit removes all locations that add `dllexport` to LLVM variables and instead dynamically generates a `*.def` file which is passed to the linker. This file will include all the public symbols of the current object file as well as all upstream libraries, and the crucial aspect is that it's only used when generating a dynamic library. When generating an executable this file isn't generated, so all the symbols aren't exported from an executable. To ensure that statically included native libraries are reexported correctly, the previously added support for the `#[linked_from]` attribute is used to determine the set of FFI symbols that are exported from a dynamic library, and this is required to get the compiler to link correctly. |
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| .. | ||
| cfg | ||
| clean.mk | ||
| crates.mk | ||
| ctags.mk | ||
| debuggers.mk | ||
| dist.mk | ||
| docs.mk | ||
| grammar.mk | ||
| host.mk | ||
| install.mk | ||
| llvm.mk | ||
| main.mk | ||
| perf.mk | ||
| platform.mk | ||
| prepare.mk | ||
| reconfig.mk | ||
| rt.mk | ||
| rustllvm.mk | ||
| snap.mk | ||
| stage0.mk | ||
| target.mk | ||
| tests.mk | ||
| util.mk | ||