Makefile

default: all

CFLAGS += -I/home/jacob/dev/libgit2/include
LDFLAGS += -L/home/jacob/dev/libgit2/build
LIBRARIES += -lgit2
OBJECTS = sample.o

all: $(OBJECTS)
	gcc $(CFLAGS) $(LDFLAGS) -o out.out $(OBJECTS) $(LIBRARIES)

sample.c

#include <git2.h>
#include <stdio.h>

int main()
{
	git_repository *repo = NULL;
	//const char *url = "file:///tmp/test-repo";
	const char *url = "file:///home/jacob/dev/libgit2";
	const char *path = "/tmp/test-dest";
	const git_error *e;
	int error;

	git_libgit2_init();
	printf("before clone\n");
	error = git_clone(&repo, url, path, NULL);
	printf("after clone\n");
	if (error < 0) {
		e = giterr_last();
		printf("Error %d/%d: %s\n", error, e->klass, e->message);
		exit(error);
	}

	git_libgit2_shutdown();
	return 0;
}