b1da18fe9b
rustbuild: allow dynamically linking LLVM The makefiles and `mklldeps.py` called `llvm-config --shared-mode` to find out if LLVM defaulted to shared or static libraries, and just went with that. But under rustbuild, `librustc_llvm/build.rs` was assuming that LLVM should be static, and even forcing `--link-static` for 3.9+. Now that build script also uses `--shared-mode` to learn the default, which should work better for pre-3.9 configured for dynamic linking, as it wasn't possible back then to choose differently via `llvm-config`. Further, the configure script now has a new `--enable-llvm-link-shared` option, which allows one to manually override `--link-shared` on 3.9+ instead of forcing static. Update: There are now four static/shared scenarios that can happen for the supported LLVM versions: - 3.9+: By default use `llvm-config --link-static` - 3.9+ and `--enable-llvm-link-shared`: Use `--link-shared` instead. - 3.8: Use `llvm-config --shared-mode` and go with its answer. - 3.7: Just assume static, maintaining the status quo. |
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| .. | ||
| archive_ro.rs | ||
| build.rs | ||
| Cargo.toml | ||
| diagnostic.rs | ||
| ffi.rs | ||
| lib.rs | ||