Fix Dl_info alias not exported

src/header/dirent/mod.rs

@@ -371,4 +371,4 @@ pub extern "C" fn telldir(dir: &mut DIR) -> c_long {
 }
 
 #[unsafe(no_mangle)]
-pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_posix_dent(a: posix_dent) {}
+pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_posix_dent(_: posix_dent) {}

src/header/dlfcn/mod.rs

@@ -192,3 +192,6 @@ pub unsafe extern "C" fn dlclose(handle: *mut c_void) -> c_int {
 pub extern "C" fn dlerror() -> *mut c_char {
     ERROR.swap(0, Ordering::SeqCst) as *mut c_char
 }
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn cbindgen_stupid_alias_dlinfo_for_dladdr(_: Dl_info) {}

src/header/fcntl/mod.rs

@@ -93,7 +93,7 @@ pub unsafe extern "C" fn open(path: *const c_char, oflag: c_int, mut __valist: .
 }
 
 #[unsafe(no_mangle)]
-pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_fcntl(a: flock) {}
+pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_fcntl(_: flock) {}
 
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn posix_fallocate(fd: c_int, offset: off_t, length: off_t) -> c_int {

src/header/signal/mod.rs

@@ -541,4 +541,4 @@ pub unsafe extern "C" fn psiginfo(info: *const siginfo_t, prefix: *const c_char)
 }
 
 #[unsafe(no_mangle)]
-pub unsafe extern "C" fn cbindgen_stupid_struct_sigevent_for_timer(a: sigevent) {}
+pub unsafe extern "C" fn cbindgen_stupid_struct_sigevent_for_timer(_: sigevent) {}