为什么Rust找不到wl\u显示\u获取\u注册表？
在编写代码以使用Wayland客户端API时，Rust似乎无法找到为什么Rust找不到wl\u显示\u获取\u注册表？,rust,wayland,Rust,Wayland,在编写代码以使用Wayland客户端API时，Rust似乎无法找到wl\u display\u get\u registry符号。文件的objdump也找不到符号。然而，用GCC编译的C程序能够找到符号 为什么C程序能找到符号，而Rust却找不到？如何修复Rust程序以查找符号 操作系统：Ubuntu 18.04 LTS 生锈 建造 rustc-o wayland main.rs 输出 错误：与'cc'链接失败：退出代码：1 | =注意：“cc”“-Wl，--as needed”“-Wl，-z
wl\u display\u get\u registryrustc-o wayland main.rs
错误：与'cc'链接失败：退出代码：1
|
=注意：“cc”“-Wl，--as needed”“-Wl，-z，noexecstack”“-m64”“-L”“/home/myrddin/.rustup/toolschains/stable-x86_/lib/rustlib/x86_64-unknown-linux-gnu/lib”“wayland.main0.rcgu.o”“wayland.main 1.rcgu.o”“wayland.main.2.rcgu.o”“wayland.main3.rcgu.o”“wayland.o”“wayland.main.main4.rcgu.o”“-o”“wayland”“wayland”“wayland.crator.gu.o”“wayland“-Wl，--gc sections”“-pie”“-Wl，-z，relro，-z，nodefaultlibs”“-L”“/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib”“-L”“wayland client”“-Wl，--start group”“-Wl，--Bstatic”/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-2da986ecbb2c5327.rlib”“/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/rustlib/x86_64-unknown-linux-gnu/lib/lib/lib/lib/libpanic\u unwind-57F46848C9F4ee.rlib”/home/myrddin/.rustup/toolstanks/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/lib/liballoc\u jemalloc-23263fe5893322f6.rlib”“/home/myrddin/.rustup/toolstanks/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/lib/lib/lib/libunwind-6ed5262c9a3a3a.rlib/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc_system-99c162b689d4349.rlib”“/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/lib/lib/lib-cd4155b85267875.rlib”/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/lib/liballoc-3876ac10aa96a1e3.rlib”“/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/lib/lib/lib/lib/libstd\unicode-598B0E9AC382E9A.rlib/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-4eabb2b1c31071b8.rlib”“-Wl，--end-group”“/home/myrddin/.rustup/toolschains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu-gnu-gnu/lib/lib/lib/lib/lib编译器内置程序-D7A656735ceae9e.rlib”“-Wl，--l”“-l”“-l”“-l”“-l”“-pthread“-l”“pthread”“-l”“gcc_s”“-l”“c”“-l”“m”“-l”“rt”“-l”“pthread”“-l”“util”“-l”“util”
=注意：wayland.main3.rcgu.o:在函数'main:：main'中：
main3-317d481089b8c8fe83113de504472633.rs:（.text.\u ZN4main4main17h52709beaa06fe157E+0x109）：对“wl\u显示\u获取\u注册表”的未定义引用
collect2:错误：ld返回了1个退出状态
gcc-o wayland-lwayland客户端main.c
已连接到Wayland显示服务器。
从航路显示中检索注册表。
已检索注册表。
已断开与Wayland显示服务器的连接。
#包括
#包括
int main（）
{
结构wl_显示*显示；
结构WLU注册表*注册表；
显示=wl\U显示\U连接（空）；
如果（显示==NULL）
{
fprintf（stderr，“无法连接到Wayland显示服务器。\n”）；
返回1；
}
fprintf（标准输出，“连接到Wayland显示服务器。\n”）；
fprintf（stdout，“从航路显示检索注册表。\n”）；
注册表=wl\U显示\U获取\U注册表（显示）；
if（注册表==NULL）
{
fprintf（stderr，“无法检索注册表。\n”）；
}
其他的
{
fprintf（标准输出，“检索到注册表。\n”）；
}
wl_显示_断开（显示）；
fprintf（标准输出，“与Wayland显示服务器断开连接。\n”）；
返回0；
}
objdumpobjdump-TC/usr/lib/x86_64-linux-gnu/libwayland-client.so | grep“wl_display*”
000000000000 5F60 g DF.text 0000000000000 275基本wl\u显示\u连接
0000000000006960 g DF.文本00000000000000 78基本wl\U显示\U刷新
0000000000006a90 g DF.文本000000000000000 C基本wl\U显示\U调度
00000000000067b0 g DF.文本00000000000000 42基本wl\u显示\u取消\u读取
00000000000068c0 g DF.text 000000000000000 C基本wl\u显示\u调度\u挂起
0000000000006800 g DF.text 00000000000000 BF基本wl\u显示\u调度\u队列\u挂起
00000000000061e0 g DF.文本00000000000000 57基本wl\U显示\U断开
0000000000006be0 g DF.text 00000000000000 FC基本wl\u显示\u往返\u队列
00000000000068d0 g DF.文本00000000000000 2C基本wl\u显示\u获取\u错误
0000000000005610 g DF.text 00000000000000 31基本wl\u显示\u创建\u队列
0000000000006740 g DF.text 00000000000000 52基本wl\u显示\u准备\u读取\u队列
0000000000006900 g DF.text 00000000000000 51基本wl\u显示\u获取\u协议\u错误
000000000000 5DC0 g DF.文本0000000000000 194基本wl\U显示\U连接到\U fd
00000000000069e0 g DF.text 00000000000000 AC基本wl\u显示\u调度\u队列
0000000000006ce0 g DF.文本000000000000000 C基本wl\U显示\U往返
0000000000006250 g DF.文本0000000000000 4F0基本wl\U显示\U读取\U事件
0000000000006240 g DF.文本000000000000000 4基本wl\U显示\U获取\U fd
0000000000 20DCE0 g DO.data.rel.ro 00000000000000 28基本WLU显示界面
00000000000067a0 g DF.文本000000000000000 C基本wl\U显示\U准备\U读取
wayland client protocols.hwl\u display\u get\u registrystatic inlinepub enum WLDisplay {}
pub enum WLProxy {}
pub enum WLRegistry {}
const WL_DISPLAY_GET_REGISTRY: ::std::os::raw::c_uint = 1;
#[link(name = "wayland-client")]
extern "C" {
#[no_mangle]
static wl_registry_interface: WLInterface;
pub fn wl_display_connect(name: *const ::std::os::raw::c_char) -> *mut WLDisplay;
pub fn wl_display_disconnect(display: *mut WLDisplay) -> ();
pub fn wl_proxy_marshal_constructor(
proxy: *mut WLProxy,
opcode: ::std::os::raw::c_uint,
interface: *const WLInterface,
) -> *mut WLProxy;
}
#[repr(C)]
pub struct WLMessage {
pub name: *const ::std::os::raw::c_char,
pub signature: *const ::std::os::raw::c_char,
pub types: *const *const WLInterface,
}
#[repr(C)]
pub struct WLInterface {
pub name: *const ::std::os::raw::c_char,
pub version: ::std::os::raw::c_int,
pub request_count: ::std::os::raw::c_int,
pub requests: *const WLMessage,
pub event_count: ::std::os::raw::c_int,
pub events: *const WLMessage,
}
fn wl_display_get_registry(display: *mut WLDisplay) -> *mut WLRegistry {
let proxy: *mut WLProxy;
unsafe {
proxy = wl_proxy_marshal_constructor(
display as *mut _ as *mut WLProxy,
WL_DISPLAY_GET_REGISTRY,
&wl_registry_interface,
);
proxy as *mut _ as *mut WLRegistry
}
}
fn main() {
let display: *mut WLDisplay;
let registry: *mut WLRegistry;
unsafe {
display = wl_display_connect(::std::ptr::null());
if display.is_null() == true {
eprintln!("Unable to connect to the Wayland display server.");
return;
}
println!("Connected to Wayland display server.");
println!("Retrieving the registry from the Wayland display.");
registry = wl_display_get_registry(display);
if registry.is_null() == true {
eprintln!("Unable to retrieve registry.");
} else {
println!("Registry retrieved.");
}
wl_display_disconnect(display);
println!("Disconnected from Wayland display server.");
}
}
pub enum WLDisplay {}
pub enum WLProxy {}
pub enum WLRegistry {}
const WL_DISPLAY_GET_REGISTRY: ::std::os::raw::c_uint = 1;
#[link(name = "wayland-client")]
extern "C" {
#[no_mangle]
static wl_registry_interface: WLInterface;
pub fn wl_display_connect(name: *const ::std::os::raw::c_char) -> *mut WLDisplay;
pub fn wl_display_disconnect(display: *mut WLDisplay) -> ();
pub fn wl_proxy_marshal_constructor(
proxy: *mut WLProxy,
opcode: ::std::os::raw::c_uint,
interface: *const WLInterface,
) -> *mut WLProxy;
}
#[repr(C)]
pub struct WLMessage {
pub name: *const ::std::os::raw::c_char,
pub signature: *const ::std::os::raw::c_char,
pub types: *const *const WLInterface,
}
#[repr(C)]
pub struct WLInterface {
pub name: *const ::std::os::raw::c_char,
pub version: ::std::os::raw::c_int,
pub request_count: ::std::os::raw::c_int,
pub requests: *const WLMessage,
pub event_count: ::std::os::raw::c_int,
pub events: *const WLMessage,
}
fn wl_display_get_registry(display: *mut WLDisplay) -> *mut WLRegistry {
let proxy: *mut WLProxy;
unsafe {
proxy = wl_proxy_marshal_constructor(
display as *mut _ as *mut WLProxy,
WL_DISPLAY_GET_REGISTRY,
&wl_registry_interface,
);
proxy as *mut _ as *mut WLRegistry
}
}
fn main() {
let display: *mut WLDisplay;
let registry: *mut WLRegistry;
unsafe {
display = wl_display_connect(::std::ptr::null());
if display.is_null() == true {
eprintln!("Unable to connect to the Wayland display server.");
return;
}
println!("Connected to Wayland display server.");
println!("Retrieving the registry from the Wayland display.");
registry = wl_display_get_registry(display);
if registry.is_null() == true {
eprintln!("Unable to retrieve registry.");
} else {
println!("Registry retrieved.");
}
wl_display_disconnect(display);
println!("Disconnected from Wayland display server.");
}
}