add configure-time check for timespecsub

2019-01-06 13:20:29 -06:00
parent 779ec4dedc
commit 7af3ba340d
3 changed files with 13 additions and 2 deletions
--- a/include/compat/time.h
+++ b/include/compat/time.h
@@ -39,7 +39,11 @@ typedef int clockid_t;
 int clock_gettime(clockid_t clock_id, struct timespec *tp);
 #endif

-#ifndef timespecsub
+#ifdef timespecsub
+#define HAVE_TIMESPECSUB
+#endif
+
+#ifndef HAVE_TIMESPECSUB
 #define timespecsub(tsp, usp, vsp)                                      \
        do {                                                            \
                (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;          \
@@ -50,6 +54,7 @@ int clock_gettime(clockid_t clock_id, struct timespec *tp);
                }                                                       \
        } while (0)
 #endif
+
 #endif

 #endif