patch 9.0.1450: MacOS: building fails if clock_gettime() is not availablev9.0.1450

Problem:    MacOS: building fails if clock_gettime() is not available.
Solution:   Add a configure check for clock_gettime(). (closes #12242)

1 files changed, 2 insertions, 1 deletions

diff --git a/src/vim.h b/src/vim.h
index 5289214ec1..656bcc9dab 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1873,7 +1873,8 @@ typedef LARGE_INTEGER proftime_T;
 #  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