libarchive Complete Extractor - extractor

Question

I downloaded libarchive-3.3.2.zip and build it using mingw32 according to
https://github.com/libarchive/libarchive/wiki/BuildInstructions
I also set
LIBS += -L$$PWD/libarchive/ -larchive_static
for static-build.
After building, I tried to extract my .zip file using examples in
https://github.com/libarchive/libarchive/wiki/Examples#A_Complete_Extractor
static int copy_data(struct archive *ar, struct archive *aw)
{
int r;
const void *buff;
size_t size;
la_int64_t offset;
for (;;) {
r = archive_read_data_block(ar, &buff, &size, &offset);
if (r == ARCHIVE_EOF)
return (ARCHIVE_OK);
if (r < ARCHIVE_OK)
return (r);
r = archive_write_data_block(aw, buff, size, offset);
if (r < ARCHIVE_OK) {
fprintf(stderr, "%s\n", archive_error_string(aw));
return (r);
}
}
}
static void extract(const char *filename)
{
struct archive *a;
struct archive *ext;
struct archive_entry *entry;
int flags;
int r;
/* Select which attributes we want to restore. */
flags = ARCHIVE_EXTRACT_TIME;
flags |= ARCHIVE_EXTRACT_PERM;
flags |= ARCHIVE_EXTRACT_ACL;
flags |= ARCHIVE_EXTRACT_FFLAGS;
a = archive_read_new();
archive_read_support_format_all(a);
archive_read_support_compression_all(a);
ext = archive_write_disk_new();
archive_write_disk_set_options(ext, flags);
archive_write_disk_set_standard_lookup(ext);
if ((r = archive_read_open_filename(a, filename, 10240))){
exit(1);
}
for (;;) {
qDebug()<<"for;;";
r = archive_read_next_header(a, &entry);
if (r == ARCHIVE_EOF)
break;
if (r < ARCHIVE_OK)
fprintf(stderr, "%s\n", archive_error_string(a));
if (r < ARCHIVE_WARN){
exit(1);
}
r = archive_write_header(ext, entry);
if (r < ARCHIVE_OK)
fprintf(stderr, "%s\n", archive_error_string(ext));
else if (archive_entry_size(entry) > 0) {
r = copy_data(a, ext);
if (r < ARCHIVE_OK){
fprintf(stderr, "%s\n", archive_error_string(ext));
}
if (r < ARCHIVE_WARN){
exit(1); //A1: Program exits here.
}
}
r = archive_write_finish_entry(ext);
if (r < ARCHIVE_OK)
fprintf(stderr, "%s\n", archive_error_string(ext));
if (r < ARCHIVE_WARN){
exit(1);
}
}
archive_read_close(a);
archive_read_free(a);
archive_write_close(ext);
archive_write_free(ext);
exit(0);
}
When I run the above code, it exits at A1.
When I debug
r = copy_data(a, ext);
I found r = -25
and #define ARCHIVE_WARN (-20)
It seems something wrong with my build, but I could not figure it out.