21:3: error: implicit declaration of function 'ACPI_PTR' [-Werror=implicit-function-declaration]

这个错误是因为在代码中使用了一个未声明的函数ACPI_PTR，导致编译器无法识别该函数。解决方法是在代码中显式地声明该函数或者包含该函数所在的头文件。如果该函数是在外部库中定义的，需要将该库链接到代码中。另外，也可以通过在编译时加上-Wno-error=implicit-function-declaration选项来忽略该错误。

相关问题

error: implicit declaration of function 'ACPI_PTR'

The error message "implicit declaration of function 'ACPI_PTR'" indicates that you are trying to use a function called 'ACPI_PTR' without declaring it or including the necessary header file.

To resolve this issue, you need to include the appropriate header file that declares the 'ACPI_PTR' function. The header file may vary depending on the context and the specific library or API you are using.

First, check the documentation or reference material for the library or API you are using to find out which header file you need to include. Once you have identified the correct header file, make sure to include it at the top of your source file before using the 'ACPI_PTR' function. For example:

#include <acpi.h> // or the appropriate header file

// Rest of your code
// Use the 'ACPI_PTR' function here

By including the correct header file, you should be able to resolve the "implicit declaration" error and properly use the 'ACPI_PTR' function.

/os_intfs.c:1641:5: error: implicit declaration of function ‘wiphy_net’ [-Werror=implicit-function-declaration] dev_net_set(ndev, wiphy_net(adapter_to_wiphy(adapter)));

这是一个编译错误，提示该文件中的第1641行出现了一个隐式声明的函数"wiphy_net"，导致编译失败。这意味着在该文件中没有包含"wiphy.h"头文件或者相关的库文件。你需要确认代码中是否包含了正确的头文件和库文件，并且代码中是否正确引用了这些文件。如果确认无误之后，可以尝试修改编译选项，添加相关的库文件或者头文件路径。