From dded9c0b33e182d0a11df2f59dd24921edbdfeb4 Mon Sep 17 00:00:00 2001
From: Feiyi Wang <fwang2@gmail.com>
Date: Wed, 29 Aug 2018 21:03:31 -0400
Subject: [PATCH] skip fallocate on Mac, #23

---
 lib/posix.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/posix.c b/lib/posix.c
index 24aafc0..6ba279b 100644
--- a/lib/posix.c
+++ b/lib/posix.c
@@ -47,10 +47,12 @@ void *posix_write(void *fdes, lcio_job_t *job, off_t flag) {
     rv = malloc(sizeof(ssize_t));
     *rv = 0;
 
+#ifdef HAVE_POSIX_FALLOCATE
     if(job->ftrunc){
         *rv = posix_fallocate(*(int*)fdes, 0, flag);
         return rv;
     }
+#endif
 
     if(flag == 0) {
         for (i = 0; i < job->blk_sz; i += job->buf_sz) {