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fix linux cross-compilation, take 2

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We were using `cfg!(target_arch)` checks, which are not correct, as
those check the architecture of the compiled build script, not the clang
target.
This commit is contained in:
Nathan Froyd 2017-05-15 17:08:24 -04:00
parent abb2985ffe
commit 536154475c
1 changed files with 10 additions and 8 deletions
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18
components/style/build_gecko.rs
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@ -153,14 +153,16 @@ mod bindings {
}
if cfg!(target_os = "linux") {
builder = builder.clang_arg("-DOS_LINUX=1");
// We may be cross-compiling with a clang that defaults to
// a different architecture, so we should explicitly specify
// the bitness being used here. Specifying --target instead
// leads to difficulties with LLVM search paths.
if cfg!(target_arch = "x86") {
builder = builder.clang_arg("-m32")
} else if cfg!(target_arch = "x86_64") {
builder = builder.clang_arg("-m64")
// cfg!(target_arch) will tell us the architecture that this .rs
// file is being compiled for. We want the architecture that
// the clang we're going to invoking is compiling for, which
// isn't necessarily the same thing. Cargo provides the
// (undocumented) CARGO_CFG_TARGET_ARCH for this purpose
let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
if target_arch == "x86" {
builder = builder.clang_arg("-m32");
} else if target_arch == "x86_64" {
builder = builder.clang_arg("-m64");
}
} else if cfg!(target_os = "solaris") {
builder = builder.clang_arg("-DOS_SOLARIS=1");