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rustbuild: Tweak how we cross-compile LLVM

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In preparation for upgrading to LLVM 5.0 it looks like we need to tweak how we
cross compile LLVM slightly. It's using `CMAKE_SYSTEM_NAME` to infer whether to
build libFuzzer which only works on some platforms, and then once we configure
that it needs to apparently reach into the host build area to try to compile
`llvm-config` as well. Once these are both configured, though, it looks like we
can successfully cross-compile LLVM.
This commit is contained in:
Alex Crichton 2017-07-28 12:17:52 -07:00
parent 6f815ca771
commit 069a1b3c8f
1 changed files with 8 additions and 0 deletions
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8
src/bootstrap/native.rs
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@ -154,6 +154,14 @@ impl Step for Llvm {
let host = build.llvm_out(build.build).join("bin/llvm-tblgen");
cfg.define("CMAKE_CROSSCOMPILING", "True")
.define("LLVM_TABLEGEN", &host);
if target.contains("netbsd") {
cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
} else if target.contains("freebsd") {
cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
}
cfg.define("LLVM_NATIVE_BUILD", build.llvm_out(build.build).join("build"));
}
let sanitize_cc = |cc: &Path| {