From 5e7f935a272ea5a8c1a87834089cb56454602c81 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 24 Oct 2014 17:15:03 +0200
Subject: [PATCH] add explicit construction (for MSVC) and some debug messages

---
 libs/backends/jack/weak_libjack.c   | 21 +++++++++++++++++----
 libs/backends/jack/weak_libjack.def |  2 +-
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/libs/backends/jack/weak_libjack.c b/libs/backends/jack/weak_libjack.c
index e48f11b89d..bba1055b38 100644
--- a/libs/backends/jack/weak_libjack.c
+++ b/libs/backends/jack/weak_libjack.c
@@ -84,15 +84,15 @@ static struct WeakJack {
 
 static int _status = -1;
 
-int have_libjack (void) {
-	return _status;
-}
-
 __attribute__((constructor))
+//__attribute__((constructor))
 static void init_weak_jack(void)
 {
 	void* lib;
 	int err = 0;
+#ifndef NDEBUG
+	fprintf(stderr, "*** WEAK-JACK: initializing\n");
+#endif
 
 	memset(&_j, 0, sizeof(_j));
 
@@ -111,6 +111,9 @@ static void init_weak_jack(void)
 	lib = lib_open("libjack.so.0");
 #endif
 	if (!lib) {
+#ifndef NDEBUG
+		fprintf(stderr, "*** WEAK-JACK: libjack was not found\n");
+#endif
 		_status = -2;
 		return;
 	}
@@ -135,6 +138,16 @@ static void init_weak_jack(void)
 		_j._client_open = NULL;
 	}
 	_status = err;
+#ifndef NDEBUG
+	fprintf(stderr, "*** WEAK-JACK: %s. (%d)\n", err ? "jack is not available" : "OK", _status);
+#endif
+}
+
+int have_libjack (void) {
+	if (_status == -1) {
+		init_weak_jack();
+	}
+	return _status;
 }
 
 /*******************************************************************************
diff --git a/libs/backends/jack/weak_libjack.def b/libs/backends/jack/weak_libjack.def
index 4118dbd9ea..eeab00e943 100644
--- a/libs/backends/jack/weak_libjack.def
+++ b/libs/backends/jack/weak_libjack.def
@@ -9,7 +9,7 @@
  * see https://en.wikibooks.org/wiki/C_Programming/Preprocessor#X-Macros
  */
 
-#ifndef USE_WEAK_JACK
+#ifdef USE_WEAK_JACK
 
 /* <jack/jack.h> */
 JCFUN(1, int,            client_close, 0)