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 4cf7c436e6e0da0d64cff241e2ddac56918c1591..9d840a15fa899c75d7e900ce00dac66e81b5942b 100644 (file)
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -25,6 +25,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <signal.h>
 
 #ifdef HAVE_LIBZ
 #include <zlib.h>