Importing serde_derive breaks linking with -no-pie

[fintelia]

I am trying to compile/link an rust binary with the 'position independent executable' option disabled: RUSTFLAGS='-C link-args=-no-pie' cargo build. Unfortunately this fails with some message about there being an undefined reference to 'main':

Cargo.toml

[dependencies]
serde_derive = "1.0.27"

main.rs

fn main() {
    println!("Hello, world!");
}

Output

$ RUSTFLAGS='-C link-args=-no-pie' cargo run
    Updating registry `https://github.com/rust-lang/crates.io-index`
   Compiling unicode-xid v0.0.4                                                 
   Compiling quote v0.3.15
   Compiling synom v0.11.3
   Compiling syn v0.11.11
   Compiling serde_derive_internals v0.19.0
   Compiling serde_derive v1.0.27
error: linking with `cc` failed: exit code: 1
  |
  = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive0.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive1.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive10.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive11.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive12.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive13.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive14.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive15.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive2.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive3.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive4.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive5.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive6.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive7.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive8.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.serde_derive9.rcgu.o" "-o" "/home/jonathan/tmp/nopie/target/debug/deps/libserde_derive-15f8c0303f68afa3.so" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.crate.metadata.rcgu.o" "/home/jonathan/tmp/nopie/target/debug/deps/serde_derive-15f8c0303f68afa3.crate.allocator.rcgu.o" "-Wl,--gc-sections" "-Wl,-z,relro,-z,now" "-nodefaultlibs" "-L" "/home/jonathan/tmp/nopie/target/debug/deps" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "proc_macro-dbb3728015139f51" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "syntax-fd13c29373df4f32" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "rustc_errors-586e8b64fc2b1ee1" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "syntax_pos-b92697c9516e22cd" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "rustc_data_structures-9356121041ab101f" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "term-b0a9d9a4fa46c516" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "serialize-0c02b46e132d65cd" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-l" "rustc_cratesio_shim-d85d281c1ae4fbed" "-Wl,-Bstatic" "/home/jonathan/tmp/nopie/target/debug/deps/libserde_derive_internals-dfff010d8f3870c4.rlib" "/home/jonathan/tmp/nopie/target/debug/deps/libsyn-6778c577bae6261b.rlib" "/home/jonathan/tmp/nopie/target/debug/deps/libsynom-8f1e831ed05d238b.rlib" "/home/jonathan/tmp/nopie/target/debug/deps/libunicode_xid-64639fedc42b2f52.rlib" "/home/jonathan/tmp/nopie/target/debug/deps/libquote-7fb350a7f66c2b76.rlib" "-L" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bdynamic" "-l" "std-0c7689c28c53c7bc" "-Wl,-Bstatic" "/home/jonathan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-9800ad35a81c8987.rlib" "-Wl,-Bdynamic" "-l" "util" "-l" "util" "-l" "dl" "-l" "rt" "-l" "pthread" "-l" "pthread" "-l" "gcc_s" "-l" "c" "-l" "m" "-l" "rt" "-l" "pthread" "-l" "util" "-l" "util" "-shared" "-no-pie"
  = note: /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crt1.o: In function `_start':
          (.text+0x20): undefined reference to `main'
          collect2: error: ld returned 1 exit status
          

error: aborting due to previous error

error: Could not compile `serde_derive`.

To learn more, run the command again with --verbose.

[dtolnay]

Thanks! I don't think this is something we can fix in Serde so I filed rust-lang/cargo#5115 to follow up in Cargo.