我试图在linux内核中学习更多关于kobject的知识,并且在尝试编写使用这种设施的模块时,我收到错误和警告消息,所以我已经在这里放下了相关数据结构的修剪版本以及相应的gcc的错误和警告信息。指定的初始化程序:GCC警告消息:临近初始化和其他警告消息
$ gcc issue.c
issue.c:30:1: error: initializer element is not constant
} ;
^
issue.c:30:1: error: (near initialization for ‘first.attr’)
issue.c:34:1: error: initializer element is not constant
};
^
issue.c:34:1: error: (near initialization for ‘second.attr’)
issue.c:39:8: warning: initialization from incompatible pointer type [enabled by default]
struct bin_attribute *my_bin_attrs[] = { &first_bin_attrs, &second_bin_attrs };
^
issue.c:39:8: warning: (near initialization for ‘my_bin_attrs[0]’) [enabled by default]
issue.c:39:8: warning: initialization from incompatible pointer type [enabled by default]
issue.c:39:8: warning: (near initialization for ‘my_bin_attrs[1]’) [enabled by default]
和样例代码:
#include <stdio.h>
struct attribute {
const char *name;
unsigned short mode;
};
struct bin_attribute {
struct attribute attr;
unsigned int size;
void *private;
};
struct attribute_group {
const char *name;
struct attribute **attrs;
struct bin_attribute **bin_attrs;
};
struct attribute first_attr = {
.name = "FIRST"
};
struct attribute second_attr = {
.name = "SECOND"
};
struct bin_attribute first = {
.attr = first_attr
} ;
struct bin_attribute second = {
.attr = second_attr
};
struct bin_attribute *first_bin_attrs = &first;
struct bin_attribute *second_bin_attrs = &second;
struct bin_attribute *my_bin_attrs[] = { &first_bin_attrs, &second_bin_attrs };
int main(void)
{
struct attribute_group my_group = {
.name = "xyz",
.bin_attrs = my_bin_attrs,
};
return 0;
}
[尝试使用const初始化变量时,错误“initializer元素不是常量”的可能重复(http://stackoverflow.com/questions/3025050/error-initializer-element-is-not-constant-when-试图初始化变量-W) – Dukeling
当你收到一条错误信息时,你应该** !!总是!! **谷歌错误消息试图找出它,然后再问一个关于它的问题。 – Dukeling
“和其他警告信息”当然不是理想的问题。一个问题应该是关于一个错误(/问题)(并且它们是错误的,而不是警告 - 这是有区别的)。 [so]上的帖子旨在为许多用户提供长期价值。如果你通过询问许多事情来污染帖子,任何人在寻找特定帖子时遇到这个帖子的机会都很渺茫,如果他们这样做了,他们将不得不筛选所有其他不适用的信息到其他错误。 – Dukeling