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Is X defined in linux/symtab_begin.h?<br />

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I found the define X in the <br />
symtab_begin.h<br />
#define X(sym) { _basic_version(sym) }<br />
<br />

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I found the define X in the
symtab_begin.h
#define X(sym) { _basic_version(sym) }



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Ah, a macro. As I say, I don't have symtab_begin.h or symtab_end.h, so it was impossible for me to find out.<br />
<br />
Thanks,<br />
<br />
David<br />

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Ah, a macro. As I say, I don't have symtab_begin.h or symtab_end.h, so it was impossible for me to find out.

Thanks,

David


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To ozo: Sorry I answered the question at the same time so I didn't see your comment.<br />

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To ozo: Sorry I answered the question at the same time so I didn't see your comment.


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<div class="content wysiwyg-content">
I recently found the following declaration in a program I'm studying:<br />
<br />
static struct symbol_table my_symtab = {<br />
&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#include &lt;linux/symtab_begin.h&gt;<br />
&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;X(printk),<br />
&nbsp; &nbsp; &nbsp; &nbsp; X(vmalloc),<br />
&nbsp; &nbsp; &nbsp; &nbsp; X(vfree),<br />
&nbsp; &nbsp; &nbsp; &nbsp; X(kerneld_send),<br />
&nbsp; &nbsp; &nbsp; &nbsp; X(current_set),<br />
&nbsp; &nbsp; &nbsp; &nbsp; X(sys_call_table),<br />
&nbsp; &nbsp; &nbsp; &nbsp; X(register_symtab_from),<br />
&nbsp; &nbsp; &nbsp; &nbsp; #include &lt;linux/symtab_end.h&gt;<br />
};<br />
<br />
<br />
<br />
I know the symbol_table struct is defined in module.h; but its contents seem to bear no resemblance to the above. Why does the declaration begin and end with the preprocessor instructions, and what exactly do symtab_begin.h and symtab_end.h do? (They're not on my system - Linux 2.0.0 slakware - at all.) Also, what does the X refer to? Is it some obscure preprocessor instruction? (It's not mentioned in Kernighan and Ritchie's book.)<br />
<br />
Thanks for any help,<br />
<br />
David<br />

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</div>


I recently found the following declaration in a program I'm studying:

static struct symbol_table my_symtab = {
   	#include <linux/symtab_begin.h>
   	X(printk),
        X(vmalloc),
        X(vfree),
        X(kerneld_send),
        X(current_set),
        X(sys_call_table),
        X(register_symtab_from),
        #include <linux/symtab_end.h>
};



I know the symbol_table struct is defined in module.h; but its contents seem to bear no resemblance to the above. Why does the declaration begin and end with the preprocessor instructions, and what exactly do symtab_begin.h and symtab_end.h do? (They're not on my system - Linux 2.0.0 slakware - at all.) Also, what does the X refer to? Is it some obscure preprocessor instruction? (It's not mentioned in Kernighan and Ritchie's book.)

Thanks for any help,

David


strange struct declaration

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