Bindings for types mentioned in whitelisted function's signature are not generated

[fitzgen]

The transitive nature of whitelisting means that bindings for these types should be generated.

Testcase incoming...

[fitzgen]

$ ./target/debug/bindgen ./linux_bindings.h --whitelist-function dl_iterate_phdr

Input:

struct dl_phdr_info {
    int x;
};

int dl_iterate_phdr(struct dl_phdr_info *);

Output:

/* automatically generated by rust-bindgen */

extern "C" {
    pub fn dl_iterate_phdr(arg1: *mut dl_phdr_info) -> ::std::os::raw::c_int;
}

Note the lack of a definition for dl_phdr_info, despite it being in the signature of the whitelisted dl_iterate_phdr function.