Hang during release build with UEFI

Tái hiện hiện tượng treo bằng cargo b -r -vv với một thư mục target được chia sẻ trên toàn cục, sau đó kiểm tra build_uefi_bootloader và bước cargo install bootloader-x86_64-uefi được mô tả trong báo cáo. So sánh với một thư mục target tạm thời được cô lập. Được xem là hoàn tất khi bản build release không còn bị treo với cấu hình được báo cáo, hoặc khi giới hạn này được ghi rõ trong tài liệu.

Running cargo b -r -vv produces the following output where it hangs (seemingly indefinitely) at zero CPU usage:

[bootloader 0.11.5] warning: `bootloader-x86_64-bios-stage-2` (bin "bootloader-x86_64-bios-stage-2") generated 2 warnings
[bootloader 0.11.5]     Finished stage-2 [optimized] target(s) in 1.51s
[bootloader 0.11.5]    Replacing /home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin/bootloader-x86_64-bios-stage-2
[bootloader 0.11.5]     Replaced package `bootloader-x86_64-bios-stage-2 v0.11.5 (/tmp/bootloader/bios/stage-2)` with `bootloader-x86_64-bios-stage-2 v0.11.5 (/tmp/bootloader/bios/stage-2)` (executable `bootloader-x86_64-bios-stage-2`)
[bootloader 0.11.5] warning: be sure to add `/home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin` to your PATH to be able to run the installed binaries
[bootloader 0.11.5]     Finished stage-3 [optimized + debuginfo] target(s) in 1.52s
[bootloader 0.11.5]    Replacing /home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin/bootloader-x86_64-bios-stage-3
[bootloader 0.11.5]     Replaced package `bootloader-x86_64-bios-stage-3 v0.11.5 (/tmp/bootloader/bios/stage-3)` with `bootloader-x86_64-bios-stage-3 v0.11.5 (/tmp/bootloader/bios/stage-3)` (executable `bootloader-x86_64-bios-stage-3`)
[bootloader 0.11.5] warning: be sure to add `/home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin` to your PATH to be able to run the installed binaries
[bootloader 0.11.5]     Finished stage-4 [optimized + debuginfo] target(s) in 1.52s
[bootloader 0.11.5]    Replacing /home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin/bootloader-x86_64-bios-stage-4
[bootloader 0.11.5]     Replaced package `bootloader-x86_64-bios-stage-4 v0.11.5 (/tmp/bootloader/bios/stage-4)` with `bootloader-x86_64-bios-stage-4 v0.11.5 (/tmp/bootloader/bios/stage-4)` (executable `bootloader-x86_64-bios-stage-4`)
[bootloader 0.11.5] warning: be sure to add `/home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin` to your PATH to be able to run the installed binaries
[bootloader 0.11.5] cargo:rustc-env=BIOS_BOOT_SECTOR_PATH=/home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin/bootloader-x86_64-bios-boot-sector.bin
[bootloader 0.11.5] cargo:rustc-env=BIOS_STAGE_2_PATH=/home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin/bootloader-x86_64-bios-stage-2.bin
[bootloader 0.11.5] cargo:rustc-env=BIOS_STAGE_3_PATH=/home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin/bootloader-x86_64-bios-stage-3.bin
[bootloader 0.11.5] cargo:rustc-env=BIOS_STAGE_4_PATH=/home/fm208/.cargo/target/release/build/bootloader-ad4dca68f01168c6/out/bin/bootloader-x86_64-bios-stage-4.bin
    Building [=======================> ] 133/135: bootloader(build)    

I believe this is cargo install boot loader-x86_64-uefi hanging in build_uefi_bootloader due to my usage of a globally shared target-dir set in ~/.cargo/config.toml.

I can fix this by creating a temporary directory and overriding the target directory to use that, or override the target directory to create one in the root of the bootloader directory, or some other place. Also happy to close this as a WONTFIX, but I know quite a few people use a global directory to avoid large build directories cluttering their drive in different locations.