r1900362 followup: clang -Wexpansion-to-defined
ab.c:2056:5: error: macro expansion producing 'defined' has undefined behavior [-Werror,-Wexpansion-to-defined]
#if USE_SIGMASK
@@ -2028,9 +2028,12 @@ static void join_worker(struct worker *worker);
static void workers_may_exit(int sig);
#endif /* SIGINT */
-#define USE_SIGMASK (APR_HAS_THREADS \
- && (APR_HAVE_PTHREAD_H \
- || defined(SIGPROCMASK_SETS_THREAD_MASK)))
+#if (APR_HAS_THREADS \
+ && (APR_HAVE_PTHREAD_H || defined(SIGPROCMASK_SETS_THREAD_MASK)))
+#define USE_SIGMASK 1
+#else
+#define USE_SIGMASK 0
+#endif
static void init_signals(void)
{
