What is a proper way to build cc_binary

[dunnock]

When I m trying to build cc_binary with Bazel I cannot find how to properly specify dependencies so that linking would work. For instance if compiling provided demo from this repository (see dunnock#1 for full diff):

cc_binary(
    name = "democc",
    srcs = ["src/main.cc"],
    copts = ["-std=c++17"],
    deps = [
        ":blobstore-sys",
        ":blobstore-include",
        ":bridge",
        "//:cxx",
        "//:core",
    ],
)

I get linking errors:

ERROR: /home/maxim/src/rust/cxx/demo/BUILD.bazel:16:10: Linking demo/democc failed: (Exit 1): linux-sandbox failed: error executing CppLink command 
  (cd /home/maxim/.cache/bazel/_bazel_maxim/9a0a14cdd72bc9df5400d22d4d657a3e/sandbox/linux-sandbox/50/execroot/_main && \
  exec env - \
    PATH=/home/maxim/.cache/bazelisk/downloads/sha256/40f243b118f46d1c88842315e78ec5f9f6390980d67a90f7b64098613e60d65b/bin:/opt/intel/oneapi/vtune/2023.2.0/bin64:/opt/intel/oneapi/vtune/latest/bin64/:/usr/local/cuda/bin:/home/maxim/.local/bin:/opt/intel/oneapi/vtune/2023.2.0/bin64:/opt/intel/oneapi/vtune/latest/bin64/:/usr/local/cuda/bin:/home/maxim/.cargo/bin:/home/maxim/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin:/usr/local/go/bin:/home/maxim/go/bin:/usr/local/go/bin:/home/maxim/go/bin \
    PWD=/proc/self/cwd \
    TMPDIR=/tmp \
    ZERO_AR_DATE=1 \
  /home/maxim/.cache/bazel/_bazel_maxim/install/3fd603d608c2d3b856ea3d982b11227c/linux-sandbox -t 15 -w /dev/shm -w /home/maxim/.cache/bazel/_bazel_maxim/9a0a14cdd72bc9df5400d22d4d657a3e/sandbox/linux-sandbox/50/execroot/_main -w /tmp -M /home/maxim/.cache/bazel/_bazel_maxim/9a0a14cdd72bc9df5400d22d4d657a3e/sandbox/linux-sandbox/50/_hermetic_tmp -m /tmp -S /home/maxim/.cache/bazel/_bazel_maxim/9a0a14cdd72bc9df5400d22d4d657a3e/sandbox/linux-sandbox/50/stats.out -D /home/maxim/.cache/bazel/_bazel_maxim/9a0a14cdd72bc9df5400d22d4d657a3e/sandbox/linux-sandbox/50/debug.out -- /usr/bin/gcc @bazel-out/k8-fastbuild/bin/demo/democc-0.params)
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o:main.rs.cc:function org::blobstore::MultiBuf::layout::size(): error: undefined reference to 'org$blobstore$cxxbridge1$MultiBuf$operator$sizeof'
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o:main.rs.cc:function org::blobstore::MultiBuf::layout::align(): error: undefined reference to 'org$blobstore$cxxbridge1$MultiBuf$operator$alignof'
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o:main.rs.cc:function org::blobstore::create_multibuf(rust::cxxbridge1::Vec<unsigned char>): error: undefined reference to 'org$blobstore$cxxbridge1$create_multibuf'
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o:main.rs.cc:function org::blobstore::next_chunk(org::blobstore::MultiBuf&): error: undefined reference to 'org$blobstore$cxxbridge1$next_chunk'
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o:main.rs.cc:function rust::cxxbridge1::Box<org::blobstore::MultiBuf>::allocation::alloc(): error: undefined reference to 'cxxbridge1$box$org$blobstore$MultiBuf$alloc'
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o:main.rs.cc:function rust::cxxbridge1::Box<org::blobstore::MultiBuf>::allocation::dealloc(org::blobstore::MultiBuf*): error: undefined reference to 'cxxbridge1$box$org$blobstore$MultiBuf$dealloc'
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o:main.rs.cc:function rust::cxxbridge1::Box<org::blobstore::MultiBuf>::drop(): error: undefined reference to 'cxxbridge1$box$org$blobstore$MultiBuf$drop'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::String(): error: undefined reference to 'cxxbridge1$string$new'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::String(rust::cxxbridge1::String const&): error: undefined reference to 'cxxbridge1$string$clone'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::String(rust::cxxbridge1::String&&): error: undefined reference to 'cxxbridge1$string$new'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::~String(): error: undefined reference to 'cxxbridge1$string$drop'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::initString(rust::cxxbridge1::String*, char const*, unsigned long): error: undefined reference to 'cxxbridge1$string$from_utf8'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::initString(rust::cxxbridge1::String*, char16_t const*, unsigned long): error: undefined reference to 'cxxbridge1$string$from_utf16'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::String(rust::cxxbridge1::String::lossy_t, char const*, unsigned long): error: undefined reference to 'cxxbridge1$string$from_utf8_lossy'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::String(rust::cxxbridge1::String::lossy_t, char16_t const*, unsigned long): error: undefined reference to 'cxxbridge1$string$from_utf16_lossy'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::operator=(rust::cxxbridge1::String const&) &: error: undefined reference to 'cxxbridge1$string$drop'
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o:cxx.cc:function rust::cxxbridge1::String::operator=(rust::cxxbridge1::String const&) &: error: undefined reference to 'cxxbridge1$string$clone'
...

contents of democc-0.params:

❯ cat bazel-out/k8-fastbuild/bin/demo/democc-0.params
-o
bazel-out/k8-fastbuild/bin/demo/democc
-Wl,-S
-fuse-ld=gold
-B/usr/bin
-Wl,-no-as-needed
-Wl,-z,relro,-z,now
-pass-exit-codes
bazel-out/k8-fastbuild/bin/demo/_objs/democc/main.pic.o
-Wl,--start-lib
bazel-out/k8-fastbuild/bin/demo/_objs/blobstore-sys/blobstore.pic.o
-Wl,--end-lib
-Wl,--start-lib
bazel-out/k8-fastbuild/bin/demo/_objs/bridge/main.rs.pic.o
-Wl,--end-lib
bazel-out/k8-fastbuild/bin/libcxx-3687376307.a
-Wl,--start-lib
bazel-out/k8-fastbuild/bin/_objs/core-lib/cxx.pic.o
-Wl,--end-lib
bazel-out/k8-fastbuild/bin/external/+crate_repositories+vendor__foldhash-0.1.4/libfoldhash-1264529756.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-3f2fb5628a902976.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-5742b2ff1aee27a6.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-0ca9d0e07c79bf1c.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-cc5e90924cebe413.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-057643b1ee86c6e4.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-766a7f754c8a7b1e.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-bea85df8985bb2f0.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-a6ffb752c82ede63.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-faba618726e33e66.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-042a1cb2143833ef.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-9b015ab0e459320f.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-c896c1f3ebd992a5.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-d03b432324732a0e.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-8f13995dfe88b143.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-8e63f34add4b5f76.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libproc_macro-53bdffff3ca9feef.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libprofiler_builtins-f63320f165eccbac.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-092847c11df9843e.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libsysroot-bee2d06ba2b291cb.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-cb7e1a26da719554.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-b3cefab73e1d8804.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-45742ba23c5ac84b.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-7edbe936f6124018.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-1e6496089ac34c68.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-3d4809363f767eb8.a
bazel-out/k8-fastbuild/bin/external/rules_rust++rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-915fd1ebf7e3c376.a
-Wl,--start-lib
bazel-out/k8-fastbuild/bin/external/rules_rust+/ffi/cc/allocator_library/_objs/allocator_library/allocator_library.pic.o
-Wl,--end-lib
-ldl
-lpthread
-Wl,--push-state,-as-needed
-lstdc++
-Wl,--pop-state
-Wl,--push-state,-as-needed
-lm
-Wl,--pop-state

[dunnock]

I figured it out, the bridge is exporting definitions but not the implementations, to make cc linker to pick implementations from Rust those also should be exported as rust_static_library, e.g

 rust_static_library(
    name = "demolib",
    srcs = ["src/main.rs"],
    edition = "2021",
    deps = [
        ":blobstore-sys",
        ":bridge",
        "//:cxx",
    ],
) 

I have implemented this in my linked PR, let me know if that is ok to amend demo that way or is it better to create another democc?