what does this do ?
dhylands at gmail.com
Mon Jan 14 01:14:50 EST 2013
On Sun, Jan 13, 2013 at 12:09 PM, horseriver <horserivers at gmail.com> wrote:
> On Sun, Jan 13, 2013 at 09:27:45PM -0800, Dave Hylands wrote:
> > Hi,
> > On Sun, Jan 13, 2013 at 11:29 AM, horseriver <horserivers at gmail.com>
> > >
> > > hi:
> > >
> > > In kernel code . some function is defined by
> > __attribute__((__section__(".initcall" level ".init")))
> > >
> > > what does this do ?
> > It puts the address of the function in a linker section named
> > .initcallX.init where X is replaced by the level.
> why ".initcall" and level do not connect together with ## ?
> As I know , precompiler use ## to connect two strings
That's not quite true. ## is the token pasting operator and is for pasting
together pieces of a token to create a larger token.
If you have the tokens someVar_ and somethingElse you could token paste
them together to make someVar_somethingElse
The # operator is a for stringizing,which converts non-strings into strings.
In C and C++ you can "paste" strings together by just putting them one
after the other.
const char *x = "This is a long string.";
is 100% identical to
const char *x = "This" " is a long " "string.";
Shuswap, BC, Canada
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