build: make contrib/uuid dependency optional

On Linux systems we should use the libuuid from the distribution and not
bundle and statically link the contrib/uuid/ bits.

libglusterfs/src/compat-uuid.h has been introduced and should become an
abstraction layer for different UUID APIs. Non-Linux operating systems
should implement their compatibility layer there.

Once all operating systems have an implementation in compat-uuid.h, we
can remove contrib/uuid/ from the repository completely.

Change-Id: I345e5357644be2521685e00358bb8c83c4ea0577
BUG: 1206587
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/10129
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/libglusterfs/src/compat-uuid.h b/libglusterfs/src/compat-uuid.h
new file mode 100644
index 00000000000..4161b958508
--- /dev/null
+++ b/libglusterfs/src/compat-uuid.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
+ * This file is part of GlusterFS.
+ *
+ * This file is licensed to you under your choice of the GNU Lesser
+ * General Public License, version 3 or any later version (LGPLv3 or
+ * later), or the GNU General Public License, version 2 (GPLv2), in all
+ * cases as published by the Free Software Foundation.
+ */
+
+#ifndef _GF_UUID_H
+#define _GF_UUID_H
+
+#if defined(HAVE_LIBUUID) /* Linux like libuuid.so */
+
+#include <uuid.h>
+
+static inline void
+gf_uuid_clear (uuid_t uuid)
+{
+        uuid_clear (uuid);
+}
+
+static inline int
+gf_uuid_compare (uuid_t u1, uuid_t u2)
+{
+        return uuid_compare (u1, u2);
+}
+
+static inline void
+gf_uuid_copy (uuid_t dst, uuid_t src)
+{
+        uuid_copy (dst, src);
+}
+
+static inline void
+gf_uuid_generate (uuid_t uuid)
+{
+        uuid_generate  (uuid);
+}
+
+static inline int
+gf_uuid_is_null (uuid_t uuid)
+{
+        return uuid_is_null (uuid);
+}
+
+static inline int
+gf_uuid_parse (const char *in, uuid_t uuid)
+{
+        return uuid_parse (in, uuid);
+}
+
+static inline void
+gf_uuid_unparse (const uuid_t uuid, char *out)
+{
+        uuid_unparse (uuid, out);
+}
+
+/* TODO: add more uuid APIs, use constructs like this:
+#elif defined(__NetBSD__) * NetBSD libc *
+
+#include <string.h>
+
+static inline void
+gf_uuid_clear (uuid_t uuid)
+{
+        memset (uuid, 0, sizeof (uuid_t));
+}
+
+*/
+
+#else /* use bundled Linux like libuuid from contrib/uuid/ */
+
+#include "uuid.h"
+
+#endif /* HAVE_UUID */
+#endif /* _GF_UUID_H */