I try to build a dynamic library for some class defined in a BAZEL project with cc_shared_library, but the constructed dynamic library does not have symbol information for member functions returning pointer member variables.

The definition of some classes is as follows.

class TestClass {

public:

 const TypeA& member_a() const { return *(CHECK_NOTNULL(member_a_)); }

 TypeA* mutable_member_a() { return (CHECK_NOTNULL(member_a_.get)).get(); }

 // ...

 // There are some public interfaces for other members similar to the above here.

private:

 std::unique_ptr<TypeA> member_a_;

 // ...

 // There are many other class object member similar to member_a_ here.

};

The BUILD file is as follows.

cc_library(

 name = "test_class",

 srcs = ["test_class.cc"],

 hdrs = ["test_class.h"],

 deps = ["//path/to:type_a", "//path/to:other_type"],

)

(In other BUILD file)

cc_shared_library(

 name = "_test_class",

 deps = ["//path/to:test_class"],

)

After I built _test_class target, I use nm -A bazel-bin/path/to/lib_test_class.so. I can not find symbol information similar to mutable_member_a(), but I can find symbol for member_a(). I really hope to understand why symbols like mutable_member_a() are not present and how to make the dynamic library contain these symbols.

This project has a main entry function which uses TestClass objects. I build executable file which dynamically links to ‘bazel-bin/path/to/lib_test_class.so’. I can find weak symbols of mutable_member_a() of TestClass, which is so weird. Here is some other BUILD information.