Add missing include, required on some platforms

Noted by the buildfarm and Andres Freund

diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
index c27c6332ce77c798df098cb54d5ee29066a0df36..b5682d6f51191570dcefcd823007b71442a590d3 100644 (file)
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -22,6 +22,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <signal.h>
 #include <time.h>
 
 #ifdef HAVE_LIBZ