configure: add '-Wundef' to warning flags

[lttng-tools.git] / src / common / compat / string.h

diff --git a/src/common/compat/string.h b/src/common/compat/string.h
index fd4f2f021c38c29e7df97567270e3b103cbff0b6..4a96cb1456ffd2a928d18439007cfc3959b2b5e5 100644 (file)
--- a/src/common/compat/string.h
+++ b/src/common/compat/string.h
@@ -109,7 +109,7 @@ static inline int lttng_fls(int val)
 }
 #endif /* HAVE_FLS */
 
-#if HAVE_MEMRCHR
+#ifdef HAVE_MEMRCHR
 static inline
 void *lttng_memrchr(const void *s, int c, size_t n)
 {