`cargo {run,test} --all-features` fails on Arch and Fedora due to LLVM linking problems

[kkysen]

On Arch and Fedora, cargo run --all-features (or cargo build --all-features and then using c2rust transpile) and cargo test --all-features crash:

Arch:

     Running unittests (target/release/deps/c2rust_ast_exporter-08a638edb21ed379)
: CommandLine Error: Option 'openmp-ir-builder-optimistic-attributes' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options
error: test failed, to rerun pass '-p c2rust-ast-exporter --lib'

Fedora:

     Running unittests (target/release/deps/c2rust_ast_exporter-08a638edb21ed379)
: CommandLine Error: Option 'help-list' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options
error: test failed, to rerun pass '-p c2rust-ast-exporter --lib'

It appears this may be due to linking multiple or the wrong version(s) of LLVM on these platforms.

[kkysen]

On Fedora (and presumably it's the same on Arch), cargo test --all-features -p c2rust-ast-exporter causes the crash:

[docker@docker c2rust]$ cargo test --all-features -p c2rust-ast-exporter
    Finished test [unoptimized + debuginfo] target(s) in 0.03s
     Running unittests (target/debug/deps/c2rust_ast_exporter-31215c8a555ec241)
: CommandLine Error: Option 'print-summary-global-ids' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options
error: test failed, to rerun pass '-p c2rust-ast-exporter --lib'

Caused by:
  process didn't exit successfully: `/home/docker/c2rust/target/debug/deps/c2rust_ast_exporter-31215c8a555ec241` (signal: 6, SIGABRT: process abort signal)

cargo test -p c2rust-ast-exporter and cargo test --all-features -p c2rust-* for all other c2rust-* workspace crates works fine.

[kkysen]

On Fedora, libLLVM-12 and libclang-cpp are dynamically linked into the binary as shown by ldd, though they are not on Ubuntu, where things work. Though they are both linked in with or without --all-features, though their order differs:

Fedora: --all-features vs. --default-features:

-       linux-vdso.so.1 (0x00007fff8ddd9000)
-       libclang-cpp.so.12 => /lib64/libclang-cpp.so.12 (0x00007f1599c05000)
-       libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f1599be4000)
-       libm.so.6 => /lib64/libm.so.6 (0x00007f1599aa0000)
-       libtinfo.so.6 => /lib64/libtinfo.so.6 (0x00007f1599a71000)
-       libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f1599852000)
-       libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f1599837000)
-       libdl.so.2 => /lib64/libdl.so.2 (0x00007f159982e000)
-       libc.so.6 => /lib64/libc.so.6 (0x00007f159965f000)
-       /lib64/ld-linux-x86-64.so.2 (0x00007f159d47a000)
-       libLLVM-12.so => /lib64/libLLVM-12.so (0x00007f1593a97000)
-       libffi.so.6 => /lib64/libffi.so.6 (0x00007f1593a8c000)
-       libedit.so.0 => /lib64/libedit.so.0 (0x00007f1593a4f000)
-       libz.so.1 => /lib64/libz.so.1 (0x00007f1593a33000)
+       linux-vdso.so.1 (0x00007fffa1155000)
+       libclang-cpp.so.12 => /lib64/libclang-cpp.so.12 (0x00007f3aab195000)
+       libLLVM-12.so => /lib64/libLLVM-12.so (0x00007f3aa55cd000)
+       libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f3aa53ae000)
+       libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f3aa5393000)
+       libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f3aa5372000)
+       libm.so.6 => /lib64/libm.so.6 (0x00007f3aa522e000)
+       libdl.so.2 => /lib64/libdl.so.2 (0x00007f3aa5225000)
+       libc.so.6 => /lib64/libc.so.6 (0x00007f3aa5056000)
+       /lib64/ld-linux-x86-64.so.2 (0x00007f3aae32a000)
+       libffi.so.6 => /lib64/libffi.so.6 (0x00007f3aa504b000)
+       libedit.so.0 => /lib64/libedit.so.0 (0x00007f3aa500e000)
+       libz.so.1 => /lib64/libz.so.1 (0x00007f3aa4ff4000)
+       libtinfo.so.6 => /lib64/libtinfo.so.6 (0x00007f3aa4fc5000)

--all-features: Ubuntu vs. Fedora

-        linux-vdso.so.1 (0x00007ffcc2531000)
-        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fefb55b8000)
-        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fefb559c000)
-        libtinfo.so.6 => /lib/x86_64-linux-gnu/libtinfo.so.6 (0x00007fefb556a000)
-        libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fefb533e000)
-        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fefb531e000)
-        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fefb50f4000)
-        /lib64/ld-linux-x86-64.so.2 (0x00007fefb58aa000)
+        linux-vdso.so.1 (0x00007ffe10532000)
+        libclang-cpp.so.12 => /lib64/libclang-cpp.so.12 (0x00007f13a3867000)
+        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f13a3846000)
+        libm.so.6 => /lib64/libm.so.6 (0x00007f13a3702000)
+        libtinfo.so.6 => /lib64/libtinfo.so.6 (0x00007f13a36d3000)
+        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f13a34b4000)
+        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f13a3499000)
+        libdl.so.2 => /lib64/libdl.so.2 (0x00007f13a3490000)
+        libc.so.6 => /lib64/libc.so.6 (0x00007f13a32c1000)
+        /lib64/ld-linux-x86-64.so.2 (0x00007f13a70dc000)
+        libLLVM-12.so => /lib64/libLLVM-12.so (0x00007f139d6f9000)
+        libffi.so.6 => /lib64/libffi.so.6 (0x00007f139d6ee000)
+        libedit.so.0 => /lib64/libedit.so.0 (0x00007f139d6b1000)
+        libz.so.1 => /lib64/libz.so.1 (0x00007f139d695000)

[kkysen]

It appears the problem is that --all-features turns on --features llvm-static, which works on most OSes, but does not actually statically link on Fedora (and presumably Arch, too). I'm not sure why it fails to statically link. I'll try #483 again now with --features dynamic-instrumentation instead of --all-features, which implies --features dynamic-instrumentation llvm-static.