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Check that 'style' is compiled in a supported configuration.

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Provide an explanatory error message when the compilation would fail because of missing or duplicate items.
This commit is contained in:
Simon Sapin 2017-12-10 02:58:31 +01:00
parent c6bf85eca9
commit 890257ebc3
1 changed files with 9 additions and 0 deletions
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9
components/style/build.rs
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@ -94,6 +94,15 @@ fn generate_properties() {
}
fn main() {
let gecko = cfg!(feature = "gecko");
let servo = cfg!(feature = "servo");
if !(gecko || servo) {
panic!("The style crate requires enabling one of its 'servo' or 'gecko' feature flags");
}
if gecko && servo {
panic!("The style crate does not support enabling both its 'servo' or 'gecko' \
feature flags at the same time.");
}
println!("cargo:rerun-if-changed=build.rs");
println!("cargo:out_dir={}", env::var("OUT_DIR").unwrap());
generate_properties();