From 0fbc0f42b5c45916f0dc713d9336808b629edb64 Mon Sep 17 00:00:00 2001
From: Ian Barwick <ian@2ndquadrant.com>
Date: Thu, 26 Sep 2019 12:05:28 +0900
Subject: [PATCH] Prevent use of backend string functions

From PostgreSQL 12, port.h forcibly redefines printf() et al to use
the versions defined by PostgreSQL (pg_printf() et al). As this
causes linking issues in build environments which build pre-Pg12
versions against Pg12's libpq, ensure relevant macros defined
in port.h are undefined.
---
 repmgr.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/repmgr.h b/repmgr.h
index 23f3ec17..53e7874b 100644
--- a/repmgr.h
+++ b/repmgr.h
@@ -21,6 +21,37 @@
 #include <config.h>
 #endif
 
+#ifdef vsnprintf
+#undef vsnprintf
+#endif
+#ifdef snprintf
+#undef snprintf
+#endif
+#ifdef vsprintf
+#undef vsprintf
+#endif
+#ifdef sprintf
+#undef sprintf
+#endif
+#ifdef vfprintf
+#undef vfprintf
+#endif
+#ifdef fprintf
+#undef fprintf
+#endif
+#ifdef vprintf
+#undef vprintf
+#endif
+#ifdef printf
+#undef printf
+#endif
+#ifdef strerror
+#undef strerror
+#endif
+#ifdef strerror_r
+#undef strerror_r
+#endif
+
 #ifndef _REPMGR_H_
 #define _REPMGR_H_