Add needed #include.

tglsfdc · tglsfdc · commit cb09903fe631 · 2018-11-19T17:28:04.000-05:00
Per POSIX, WIFSIGNALED and related macros are provided by <sys/wait.h>. Apparently on Linux they're also pulled in by some other inclusions, but BSD-ish systems are pickier. Fixes portability issue in ffa4cbd. Per buildfarm.
diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
@@ -17,6 +17,7 @@
 #include <ctype.h>
 #include <unistd.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
 
 #include "access/heapam.h"
 #include "access/htup_details.h"
