The version of LLVM-7 in Debian unstable breaks rustc currently.
Can you try it with the LLVM-7 from Debian testing? i.e. this one:
$ apt-cache policy llvm-7
llvm-7:
Installed: 1:7-6
Candidate: 1:7-6
Version table:
1:7.0.1~+rc2-2 300
300 http://deb.debian.org/debian unstable/main amd64 Packages
*** 1:7-6 990
990 http://deb.debian.org/debian testing/main amd64 Packages
100 /var/lib/dpkg/status
X
brian m. carlson:
> Package: rustc
> Version: 1.30.0+dfsg1-2
> Severity: important
>
> If you attempt to build a release binary, rustc fails because of a bad
> relocation when making a PIE object.
>
> Steps to reproduce:
> 1. git clone https://github.com/rust-lang-nursery/rust-clippy.git
> 2. cd rust-clippy
> 3. git checkout v0.0.212
> 4. cargo build --verbose --release
> 5. Notice that the build fails.
> 6. Notice messages like the following:
>
> = note: /usr/bin/ld: /home/bmc/checkouts/external/rust-clippy/target/release/build/serde-3ddadc5e75c3de00/build_script_build-3ddadc5e75c3de00.build_script_build.140spq3r-cgu.2.rcgu.o: relocation R_X86_64_32S against `.rodata.cst16' can not be used when making a PIE object; recompile with -fPIC
> /usr/bin/ld: /home/bmc/checkouts/external/rust-clippy/target/release/build/serde-3ddadc5e75c3de00/build_script_build-3ddadc5e75c3de00.build_script_build.140spq3r-cgu.4.rcgu.o: relocation R_X86_64_32 against symbol `rust_eh_personality' can not be used when making a PIE object; recompile with -fPIC
> /usr/bin/ld: /home/bmc/checkouts/external/rust-clippy/target/release/build/serde-3ddadc5e75c3de00/build_script_build-3ddadc5e75c3de00.build_script_build.140spq3r-cgu.6.rcgu.o: relocation R_X86_64_32 against symbol `rust_eh_personality' can not be used when making a PIE object; recompile with -fPIC
> /usr/bin/ld: /home/bmc/checkouts/external/rust-clippy/target/release/build/serde-3ddadc5e75c3de00/build_script_build-3ddadc5e75c3de00.build_script_build.140spq3r-cgu.9.rcgu.o: relocation R_X86_64_32 against symbol `rust_eh_personality' can not be used when making a PIE object; recompile with -fPIC
> /usr/bin/ld: final link failed: nonrepresentable section on output
> collect2: error: ld returned 1 exit status
>
> I see similar errors on a project of my own which compiled fine on
> November 3. I also see this failure with rust 1.31.0 beta from
> experimental.
>
> -- System Information:
> Debian Release: buster/sid
> APT prefers unstable-debug
> APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'stable'), (1, 'experimental-debug'), (1, 'experimental')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
>
> Kernel: Linux 4.18.0-2-amd64 (SMP w/4 CPU cores)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> Init: systemd (via /run/systemd/system)
> LSM: AppArmor: enabled
>
> Versions of packages rustc depends on:
> ii binutils 2.31.1-7
> ii gcc 4:8.2.0-2
> ii libc6 2.27-8
> ii libc6-dev [libc-dev] 2.27-8
> ii libgcc1 1:8.2.0-9
> ii libllvm7 1:7.0.1~+rc2-2
> ii libstd-rust-dev 1.30.0+dfsg1-2
> ii libstdc++6 8.2.0-9
>
> Versions of packages rustc recommends:
> ii cargo 0.31.0-2
> ii rust-gdb 1.30.0+dfsg1-2
>
> Versions of packages rustc suggests:
> ii rust-doc 1.30.0+dfsg1-2
> pn rust-src <none>
>
> -- no debconf information
>
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