Fix warning: 'XATTR_NAME_SMACK' macro redefined.

Recent Linux uapi <linux/xattr.h> headers define XATTR_NAME_SMACK.
The <sys/xattr.h> include at the top of lib/lsm.h means that even
though the direct include of <linux/xattr.h> is guarded, it may
have already happened transitively anyway.

(The alternative fixes would be to hard-code the correct value for
XATTR_NAME_SMACK here instead, or #undef XATTR_NAME_SMACK.)

diff --git a/lib/lsm.h b/lib/lsm.h
index 3a5b7eb..e21d424 100644 (file)
--- a/lib/lsm.h
+++ b/lib/lsm.h
@@ -23,7 +23,9 @@
 #include <sys/smack.h>
 #include <linux/xattr.h>
 #else
+#ifndef XATTR_NAME_SMACK
 #define XATTR_NAME_SMACK 0
+#endif
 //ssize_t fgetxattr (int fd, char *name, void *value, size_t size);
 #define smack_smackfs_path(...) (-1)
 #define smack_new_label_from_self(...) (-1)