Automatic library init

Automatic library init

[David L. Martin]

I am updating a whole set of libraries at work, one of the complaints I
am dealing with is the need to initialize the library.

Back in the day (Borland days), there used to be a pragma directive that
could be used to automatically call a function with-in the library on
startup.  I know something like this must exist in gcc but I can't find
it.

Does anyone have info?

Re: Automatic library init

[Steven Smith]

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> Back in the day (Borland days), there used to be a pragma directive that
> could be used to automatically call a function with-in the library on
> startup.  I know something like this must exist in gcc but I can't find
> it.
I think the approved method is to use constructor functions:

void cons_func(void) __attribute__((constructor));

void cons_func(void)
{
	/* Do initialisation stuff here */
}

Note that it isn't hugely well defined what order constructor
functions get called in, so be careful when calling other libraries.

Steven.

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