gcc linker list

.gitignore

linker_list
*.o

linker_list.c

#include "linker_list.h"
#include <stdio.h>
#include <stdlib.h>

struct kek {
	int i;
	float f;
	const char* s;
};

LINKER_LIST_ITEM(struct kek, lalka) = {42, 3.14f, "ololo"};
LINKER_LIST_ITEM(struct kek, lalka) = {1337, 2.71f, "azaza"};

LINKER_LIST_DECLARE(struct kek, lalka)

static int kek_cmp(const void* a, const void* b)
{
	struct kek* ka = (struct kek*)a;
	struct kek* kb = (struct kek*)b;
	return ka->i - kb->i;
}

int main()
{
	LINKER_LIST_FOREACH(struct kek, lalka, k)
	{
		printf("before %d %f %s\n", k->i, k->f, k->s);
	}
	LINKER_LIST_QSORT(struct kek, lalka, kek_cmp);
	LINKER_LIST_FOREACH(struct kek, lalka, k)
	{
		printf("after  %d %f %s\n", k->i, k->f, k->s);
	}
	return 0;
}

linker_list.h

#ifndef LINKER_LIST_H
#define LINKER_LIST_H
#define LINKER_LIST_CONCAT2(x, y) x##y
#define LINKER_LIST_CONCAT1(x, y) LINKER_LIST_CONCAT2(x,y)
#define LINKER_LIST_ITEM(T, N) static T LINKER_LIST_CONCAT1(__LINKER_LIST_ITEM_ ## N, __LINE__) __attribute((__section__(#N))) __attribute((__used__))
#define LINKER_LIST_DECLARE(T, N) \
extern T LINKER_LIST_CONCAT1(__start_, N); \
extern T LINKER_LIST_CONCAT1(__stop_, N);
#define LINKER_LIST_FOREACH(T, N, V) for(T* V = &LINKER_LIST_CONCAT1(__start_, N); V !=  &LINKER_LIST_CONCAT1(__stop_, N); V++)
#define LINKER_LIST_QSORT(T, N, F) qsort((void*)&LINKER_LIST_CONCAT1(__start_, N), &LINKER_LIST_CONCAT1(__stop_, N) - &LINKER_LIST_CONCAT1(__start_, N), sizeof(T), F)
#define LINKER_LIST_QSORT_R(T, N, F, A) qsort_r((void*)&LINKER_LIST_CONCAT1(__start_, N), &LINKER_LIST_CONCAT1(__start_, N) - &LINKER_LIST_CONCAT1(__stop_, N), sizeof(T), F, A)
#endif//LINKER_LIST_H

Makefile

all: linker_list

linker_list: linker_list.c linker_list.h
	gcc -o $@ $< -Wall -O2

test: linker_list
	./linker_list