Fix warning about undefined behavior when expanding macro

See e.g. https://reviews.llvm.org/D15866 for more information

diff --git a/src/track/heaptrack_inject.cpp b/src/track/heaptrack_inject.cpp
index 45ffd74..cf3a69f 100644 (file)
--- a/src/track/heaptrack_inject.cpp
+++ b/src/track/heaptrack_inject.cpp
@@ -43,7 +43,11 @@
 #error unsupported word size
 #endif
 
-#define HAVE_CFREE (defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(__USE_MISC))
+#if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(__USE_MISC)
+#define HAVE_CFREE 1
+#else
+#define HAVE_CFREE 0
+#endif
 
 namespace {