patch 9.0.1450: MacOS: building fails if clock_gettime() is not available
Problem: MacOS: building fails if clock_gettime() is not available.
Solution: Add a configure check for clock_gettime(). (closes #12242)
diff --git a/src/vim.h b/src/vim.h
index 5289214..656bcc9 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1873,7 +1873,8 @@
# define PROF_TOTALS_HEADER "count total (s) self (s)"
# else
// Use tv_fsec for fraction of second (micro or nano) of proftime_T
-# if defined(HAVE_TIMER_CREATE)
+# if defined(HAVE_TIMER_CREATE) && defined(HAVE_CLOCK_GETTIME)
+# define PROF_NSEC 1
typedef struct timespec proftime_T;
# define PROF_GET_TIME(tm) clock_gettime(CLOCK_MONOTONIC, tm)
# define tv_fsec tv_nsec