--- hints/darwin.sh.orig	2017-09-28 10:47:53.000000000 -0700
+++ hints/darwin.sh	2017-09-28 10:56:53.000000000 -0700
@@ -346,9 +346,12 @@
     prodvers_minor=$(echo $prodvers|awk -F. '{print $2}')
 
     # macOS (10.12) deprecated syscall().
-    if [ "$prodvers_minor" -ge 12 ]; then
-        d_syscall='undef'
-    fi
+    # but it's still available on both macOS 10.12 and 10.13
+    # for compatibility with perl5.24 allow syscall() configuration on Sierra and later
+    # will auto-configure without syscall() if and when it's actually removed
+    # if [ "$prodvers_minor" -ge 12 ]; then
+    #     d_syscall='undef'
+    # fi
 
    lddlflags="${ldflags} -bundle -undefined dynamic_lookup"
    ;;