port: Silence macro redefinition warnings on FreeBSD

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I32473a65116fd9e4120a852a8cbc5c145e9609f7

diff --git a/include/lttng/align.h b/include/lttng/align.h
index ebf03e8dbb0c61a7f724f115e5144b3a7243fb58..8f227eb9ecb49b04cd4d48f1ef763c4a8d6acabb 100644 (file)
--- a/include/lttng/align.h
+++ b/include/lttng/align.h
@@ -33,9 +33,13 @@
 #define PAGE_SIZE              sysconf(_SC_PAGE_SIZE)
 #endif
 
+#ifndef PAGE_MASK      /* FreeBSD and macOS defines their own PAGE_MASK. */
 #define PAGE_MASK              (~(PAGE_SIZE - 1))
+#endif
 #define __ALIGN_MASK(v, mask)  (((v) + (mask)) & ~(mask))
+#ifndef ALIGN          /* FreeBSD and macOS defines their own ALIGN. */
 #define ALIGN(v, align)                __ALIGN_MASK(v, (__typeof__(v)) (align) - 1)
+#endif
 #define PAGE_ALIGN(addr)       ALIGN(addr, PAGE_SIZE)
 
 /**