/Drivers/Wireless_module.c:254:17: warning: implicit declaration of function 'dispaly_log' [-Wimplicit-function-declaration]

The compiler is warning that it cannot find a declaration for the function 'display_log' in the current scope. This means that the function has not been defined or declared before it is used in the code. This could be a typo or a missing header file that contains the function declaration. It is important to declare all functions before they are used to avoid potential errors and undefined behavior.

相关问题

linux内核报错：drivers/pmeminfo/process_mem.c:157:2: error: implicit declaration of function 'seq_printf' [-Werror,-Wimplicit-function-declaration] seq_printf(m, "%u\n", top_n); ^ drivers/pmeminfo/process_mem.c:175:9: error: implicit declaration of function 'single_open' [-Werror,-Wimplicit-function-declaration] return single_open(file, process_mem_show, NULL); ^ drivers/pmeminfo/process_mem.c:175:9: note: did you mean 'simple_open'? ./include/linux/fs.h:3243:12: note: 'simple_open' declared here extern int simple_open(struct inode *inode, struct file *file); ^ drivers/pmeminfo/process_mem.c:182:11: error: use of undeclared identifier 'seq_read' .read = seq_read, ^ drivers/pmeminfo/process_mem.c:183:13: error: use of undeclared identifier 'seq_lseek' .llseek = seq_lseek, ^ drivers/pmeminfo/process_mem.c:184:13: error: use of undeclared identifier 'single_release' .release = single_release, ^

这些错误是由于缺少头文件或者没有正确包含所需的头文件。`seq_printf`，`single_open`，`seq_read`，`seq_lseek`和`single_release`都是序列文件的函数。因此，您需要包含`<linux/seq_file.h>`头文件来解决这些错误。例如，在您的`.c`文件中添加以下行：

#include <linux/seq_file.h>

如果还有其他依赖关系，则需要添加相应的头文件。另外，请确保您的Makefile中正确包含了所有需要的源文件和头文件。

packages/amlogic/LibPlayer/amplayer/player/player.c:1553:13: error: static declaration of 'check_use_double_write' follows non-static declaration packages/amlogic/LibPlayer/amplayer/player/player.c:1387:9: note: previous implicit declaration of 'check_use_double_write' was here packages/amlogic/LibPlayer/amplayer/player/player.c: In function 'check_di_strong_dm': packages/amlogic/LibPlayer/amplayer/player/player.c:1597:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] packages/amlogic/LibPlayer/amplayer/player/player.c: In function 'check_top_botom_invert': packages/amlogic/LibPlayer/amplayer/player/player.c:1674:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] packages/amlogic/LibPlayer/amplayer/player/player.c: In function 'player_thread': packages/amlogic/LibPlayer/amplayer/player/player.c:1976:5: warning: implicit declaration of function 'avpkt_cache_init' [-Wimplicit-function-declaration] packages/amlogic/LibPlayer/amplayer/player/player.c:1996:13: warning: passing argument 4 of 'send_event' makes integer from pointer without a cast [enabled by default] In file included from packages/amlogic/LibPlayer/amplayer/player/player.c:20:0:

这个错误提示包含多个信息，其中主要的错误是“static declaration of 'check_use_double_write' follows non-static declaration”，意思是在 player.c 文件中，定义了同名的函数 check_use_double_write，一个是非静态的，一个是静态的，造成了冲突。

另外还有多个警告提示，可以先忽略。

解决方法是将其中一个函数的声明修改为与定义的类型一致，或者将其中一个函数的声明修改为静态声明，以避免编译器的冲突。

例如，如果你有以下代码：

void check_use_double_write();  // 声明一个非静态函数

static void check_use_double_write() {  // 静态定义一个同名函数
  // 函数体
}

可以将声明修改为静态声明：

static void check_use_double_write();  // 静态声明一个函数

static void check_use_double_write() {  // 静态定义一个同名函数
  // 函数体
}

或者将定义修改为非静态定义：

void check_use_double_write() {  // 非静态定义一个函数
  // 函数体
}

static void check_use_double_write() {  // 静态定义一个同名函数
  // 函数体
}