bugfix of failing to compile cargo-xbuild

ref: rust-lang/rust#62896

Author: a2not

.circleci/config.yml

@@ -15,7 +15,7 @@ jobs:
           command: 'rustup override add nightly'
       - run:
           name: install cargo-xbuild
-          command: 'cargo install cargo-xbuild --debug'
+          command: 'cargo install cargo-xbuild'
       - run:
           name: additional configuration for cargo-xbuild
           command: 'rustup component add rust-src'

Cargo.toml

@@ -42,3 +42,4 @@ panic = "abort" # disable stack unwinding on panic
 # profile used for `cargo build --release`
 [profile.release]
 panic = "abort" # disable stack unwinding on panic
+codegen-units = 1