__block_later.m

// clang __block_later.m -o __block_later -framework Foundation
// ./__block_later

#import <Foundation/Foundation.h>

static void (^ the_block)(void);

static void make_the_block(void)
{
	__block int n = 0;
	the_block = _Block_copy(^{
		printf("This block has been called %d times\n", ++n);
	});
}

int main()
{
	make_the_block();
	for (int i = 0; i < 10; ++i)
	{
		the_block();
	}
}