Apple's GCC 42 enhancements (was Re: [CFT] Experimental gcc update).

[Warner Losh]

On Nov 24, 2013, at 5:54 AM, David Chisnall wrote:

> On 23 Nov 2013, at 22:11, Pedro Giffuni <pfg at freebsd.org> wrote:
> 
>> I have particular interest in -fwritable-strings
>> and the block support, mostly with the idea of making our gcc
>> somewhat more compatible to clang.
> 
> I would absolutely love to see our GCC have blocks support.  It would be very nice to be able to use blocks in libc.  
> 
> I have some macros that allow code to call blocks even when compiled with a compiler that doesn't support them, but having native blocks support would be fantastic.  It's worth noting that Apple's libc includes a few _b variants of standard library functions:
> 
> scandir_b
> err_set_exit_b
> fts_open_b
> glob_b
> atexit_b
> bsearch_b
> heapsort_b
> mergesort_b
> psort_b
> qsort_b
> 
> These all do the same as their non-_b-suffixed equivalents, but take a block as an argument instead of a function pointer.  Adding them has been on my todo list for a while, and this would give me a strong incentive to do so...

Cool! Any chance clang supports this Apple extension? :)

Warner