From 62dc8dc110ce64fdd32eaf56026afcda59ac2319 Mon Sep 17 00:00:00 2001
From: Christian Decker <decker.christian@gmail.com>
Date: Fri, 30 Aug 2019 13:47:52 +0200
Subject: [PATCH] make: Add configuration detection and linking of libpq

If we have the client library for postgres configure will define HAVE_POSTGRES
the same way it already handled libsqlite3 an we start linking against it.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
---
 Makefile  |  5 +++++
 configure | 14 ++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/Makefile b/Makefile
index c6f03043b..6e05ee20c 100644
--- a/Makefile
+++ b/Makefile
@@ -201,6 +201,11 @@ else
 LDLIBS = -L/usr/local/lib -lm -lgmp -lsqlite3 -lz $(COVFLAGS)
 endif
 
+# If we have the postgres client library we need to link against it as well
+ifeq ($(HAVE_POSTGRES),1)
+LDLIBS += -lpq
+endif
+
 default: all-programs all-test-programs
 
 ccan/config.h: config.vars configure ccan/tools/configurator/configurator.c
diff --git a/configure b/configure
index 1d22c4704..85066278c 100755
--- a/configure
+++ b/configure
@@ -273,6 +273,20 @@ int main(void)
 	return 0;
 }
 /*END*/
+var=HAVE_POSTGRES
+desc=postgres
+style=DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE
+link=-lpq
+code=
+#include <postgresql/libpq-fe.h>
+#include <stdio.h>
+
+int main(void)
+{
+	printf("libpq version %d\n", PQlibVersion());
+	return 0;
+}
+/*END*/
 var=HAVE_GCC
 desc=compiler is GCC
 style=OUTSIDE_MAIN