From 9a5f94004611c901b6914f86721185acd69fc27f Mon Sep 17 00:00:00 2001
From: Pali Rohár <pali.rohar@gmail.com>
Date: Tue, 6 Dec 2016 23:11:47 +0100
Subject: usb-device: Check that we are not using broken libusb-1.0 library

---
 src/Makefile     | 2 +-
 src/usb-device.c | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/Makefile b/src/Makefile
index 94a8790..6813608 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -11,7 +11,7 @@ HOST_CC = $(HOST_COMPILE)$(CC)
 
 CPPFLAGS += -DVERSION=\"$(VERSION)\" -DBUILD_DATE="\"$(BUILD_DATE)\"" -D_POSIX_C_SOURCE=200809L
 CFLAGS += -W -Wall -O2 -pedantic -std=c99
-LIBS += -lusb
+LIBS += -lusb -ldl
 
 DEPENDS = Makefile ../config.mk
 
diff --git a/src/usb-device.c b/src/usb-device.c
index d3aa707..2913198 100644
--- a/src/usb-device.c
+++ b/src/usb-device.c
@@ -17,6 +17,11 @@
 
 */
 
+/* Enable RTLD_DEFAULT for glibc */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
@@ -24,6 +29,7 @@
 #include <errno.h>
 #include <ctype.h>
 #include <signal.h>
+#include <dlfcn.h>
 
 #include <usb.h>
 
@@ -316,6 +322,9 @@ struct usb_device_info * usb_open_and_wait_for_device(void) {
 	void (*prev)(int);
 	static char progress[] = {'/','-','\\', '|'};
 
+	if ( dlsym(RTLD_DEFAULT, "libusb_init") )
+		ERROR_RETURN("You are trying to use broken libusb-1.0 library (either directly or via wrapper) which has slow listing of usb devices. It cannot be used for flashing or cold-flashing. Please use libusb 0.1.", NULL);
+
 	usb_init();
 	usb_find_busses();
 
-- 
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