fuse-rs cannot build with target x86_64-unknown-linux-musl

[teawater]

With target x86_64-unknown-linux-musl

cargo build --jobs 10 --examples --target x86_64-unknown-linux-musl
   Compiling fuse-sys v0.4.0-dev (/home/teawater/fuse-rs/fuse-sys)
   Compiling regex v1.5.5
error: failed to run custom build command for `fuse-sys v0.4.0-dev (/home/teawater/fuse-rs/fuse-sys)`

Caused by:
  process didn't exit successfully: `/home/teawater/fuse-rs/target/debug/build/fuse-sys-b1102c79a2fb4df4/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-env-changed=FUSE_NO_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_ALLOW_CROSS_x86_64-unknown-linux-musl
  cargo:rerun-if-env-changed=PKG_CONFIG_ALLOW_CROSS_x86_64_unknown_linux_musl
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG_ALLOW_CROSS
  cargo:rerun-if-env-changed=PKG_CONFIG_ALLOW_CROSS
  cargo:rerun-if-env-changed=PKG_CONFIG_x86_64-unknown-linux-musl
  cargo:rerun-if-env-changed=PKG_CONFIG_x86_64_unknown_linux_musl
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64-unknown-linux-musl
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64_unknown_linux_musl
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR

  --- stderr
  pkg-config has not been configured to support cross-compilation.

  Install a sysroot for the target platform and configure it via
  PKG_CONFIG_SYSROOT_DIR and PKG_CONFIG_PATH, or install a
  cross-compiling wrapper for pkg-config and set it via
  PKG_CONFIG environment variable.
  thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: ()', fuse-sys/build.rs:12:10
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: build failed

Without x86_64-unknown-linux-musl can build.

cargo build --jobs 10 --examples
   Compiling cfg-if v1.0.0
   Compiling quick-error v1.2.3
   Compiling regex-syntax v0.6.25
   Compiling thread-scoped v1.0.2
   Compiling fuse-abi v0.4.0-dev (/home/teawater/fuse-rs/fuse-abi)
   Compiling termcolor v1.1.3
   Compiling libc v0.2.121
   Compiling memchr v2.4.1
   Compiling log v0.4.16
   Compiling fuse-sys v0.4.0-dev (/home/teawater/fuse-rs/fuse-sys)
   Compiling humantime v1.3.0
   Compiling aho-corasick v0.7.18
   Compiling atty v0.2.14
   Compiling fuse v0.4.0-dev (/home/teawater/fuse-rs)
   Compiling regex v1.5.5
   Compiling env_logger v0.6.2
    Finished dev [unoptimized + debuginfo] target(s) in 6.31s

[Xuanwo]

Please set env: PKG_CONFIG_ALLOW_CROSS=1

[famz]

The lib can build with PKG_CONFIG_ALLOW_CROSS=1 set, but I have a link error:

  = note: "cc" "-m64" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/rcrt1.o" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crti.o" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crtbeginS.o" "/tmp/rustc2Ik28f/symbols.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.18d7d8pz9mq9djva.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.1h3em126u5obk6c9.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.1k9rlzvzui81uzzy.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.1z1uisrt21k44r5i.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.23loediq03seq2ov.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.26b9al7v0nq43yvh.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.2ff33lx3ktepylli.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.2g7rsggatot65bao.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.2iq2e2ykv108tbd9.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.2qwhd0bskklq2rfl.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.36qmki34ro70c20h.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.3hxlfk6nwtfglt1z.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.3igu6qis06d5xvz0.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.3izfesopnck12kzl.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.3j4a9okamsrzt46b.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.3nqp38tfrqry3yys.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.3uiazbaafp9ojzrd.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.43p16cntq8pqhcux.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.46ee5gnndjty7gpw.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.4823km4gu448x4xm.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.49w0e52xqbmm182o.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.4daola7dfof5qrkz.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.4ivph1mq2q8y7yee.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.4ked6e0771dxwu3d.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.4uvotqzmusejsh2t.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.4uwxdbzxsr3josnq.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.52brxao47gmv13q8.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.52iegm9gsfb3vga0.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.52t60y1phh2x15vf.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.58adi2a2h78hswts.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.5cmjkjomb9lvf4h9.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.5cva3bv4msr33l1z.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.6lbfkky6kd70vve.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.j8e694vrmo4qyxc.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.l4lhu6cn6vach56.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.o2ru8qyeyaobjun.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.x0ooplm0qqr1zua.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.xdwbgbrsq66gpwy.rcgu.o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b.5bsd91ddl4frjhpr.rcgu.o" "-Wl,--as-needed" "-L" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps" "-L" "/home/fam/src/cassia/efused/target/debug/deps" "-L" "/usr/lib/x86_64-linux-gnu" "-L" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib" "-Wl,-Bstatic" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/libfuse-b6b3fdf6e7a886b7.rlib" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/libthread_scoped-6ce18bec8f7a30d5.rlib" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/liblog-b64e542dca7df01c.rlib" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/libcfg_if-e9302419824021d9.rlib" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/libfuse_sys-ae0f5e53cb387c77.rlib" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/libfuse_abi-88e01912041fd48a.rlib" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/liblibc-89426c4259882705.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-dd72223b9d53f0d3.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libpanic_unwind-74b4388f60f323df.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libobject-b64562206e8b8c08.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libmemchr-59dc3350c65ec3d1.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libaddr2line-4f67e8862fa0e329.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libgimli-364f22b05c7e89fa.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_demangle-4f16bb484d771bf4.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd_detect-2352afce7d18a4c3.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libcfg_if-349ddeef5dc70ada.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libhashbrown-e4fefbea61ed5f5f.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libminiz_oxide-7490af1cc8ac0fa3.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libadler-ce7363c87f2dd801.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_std_workspace_alloc-51b2a570aa0a2601.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind-3c1b6bc94e3089f6.rlib" "-lunwind" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libcfg_if-f1db3cccdee749da.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/liblibc-9fa9ee5bbebb767f.rlib" "-lc" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/liballoc-0d873ef1f248a1f3.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_std_workspace_core-f1818df12a324b46.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libcore-76930f0ff19494f5.rlib" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libcompiler_builtins-be4ea8801358b306.rlib" "-Wl,-Bdynamic" "-lfuse" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-nostartfiles" "-L" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib" "-L" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained" "-o" "/home/fam/src/cassia/efused/target/x86_64-unknown-linux-musl/debug/deps/efused-94ef31dc00cca65b" "-Wl,--gc-sections" "-static-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crtendS.o" "/home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crtn.o"
  = note: /usr/bin/ld: /home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-dd72223b9d53f0d3.rlib(std-dd72223b9d53f0d3.std.a5fc7cf8-cgu.0.rcgu.o): in function `std::sys::unix::os::home_dir::fallback':
          /rustc/69f9c33d71c871fc16ac445211281c6e7a340943/library/std/src/sys/unix/os.rs:626: warning: Using 'getpwuid_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
          /usr/bin/ld: /home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-dd72223b9d53f0d3.rlib(std-dd72223b9d53f0d3.std.a5fc7cf8-cgu.0.rcgu.o): in function `<std::sys_common::net::LookupHost as core::convert::TryFrom<(&str,u16)>>::try_from::{{closure}}':
          /rustc/69f9c33d71c871fc16ac445211281c6e7a340943/library/std/src/sys_common/net.rs:206: warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
          /usr/bin/ld: /home/fam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-dd72223b9d53f0d3.rlib(std-dd72223b9d53f0d3.std.a5fc7cf8-cgu.0.rcgu.o): undefined reference to symbol '__tls_get_addr@@GLIBC_2.3'
          /usr/bin/ld: /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2: error adding symbols: DSO missing from command line
          collect2: error: ld returned 1 exit status

  = note: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
  = note: use the `-l` flag to specify native libraries to link
  = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)

I think the issue lies around "-Wl,-Bdynamic" "-lfuse" but even setting fuse_STATIC=1 doesn't help. My cargo command line is:

PKG_CONFIG_ALL_STATIC=1 fuse_STATIC=1 PKG_CONFIG_ALLOW_CROSS=1 cargo build --target=x86_64-unknown-linux-musl -vv