coredumpctl: fix build with !HAVE_XZ

Fixes the following build error:

  CCLD     coredumpctl
src/journal/coredumpctl.o: In function `save_core':
/src/systemd-master/src/journal/coredumpctl.c:656:
undefined reference to `decompress_stream'
collect2: error: ld returned 1 exit status
make[2]: *** [coredumpctl] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

1 files changed, 6 insertions, 0 deletions

diff --git a/src/journal/coredumpctl.c b/src/journal/coredumpctl.c
index 08d8cdfeb7..ba78539826 100644
--- a/src/journal/coredumpctl.c
+++ b/src/journal/coredumpctl.c
@@ -644,6 +644,7 @@ static int save_core(sd_journal *j, int fd, char **path, bool *unlink_temp) {
                                 goto error;
                         }
                 } else if (filename) {
+#if HAVE_XZ
                         _cleanup_close_ int fdf;
 
                         fdf = open(filename, O_RDONLY | O_CLOEXEC);
@@ -658,6 +659,11 @@ static int save_core(sd_journal *j, int fd, char **path, bool *unlink_temp) {
                                 log_error("Failed to decompress %s: %s", filename, strerror(-r));
                                 goto error;
                         }
+#else
+                        log_error("Cannot decompress file. Compiled without XZ support.");
+                        r = -ENOTSUP;
+                        goto error;
+#endif
                 } else {
                         if (r == -ENOENT)
                                 log_error("Coredump neither in journal file nor stored externally on disk.");