add dlopen error info

deps/Makefile

@@ -19,7 +19,7 @@ flatcc/bin/flatcc: flatcc
 
 
 ptQueue:
-	@git clone ssh://git@git.nikto-b.ru:2223/nikto_b/ptQueue.git
+	@git clone https://git.nikto-b.ru/nikto_b/ptQueue
 
 ptQueue/out/ptQueue.a: ptQueue
 	@make -C ptQueue

src/hmmmm.c

@@ -99,7 +99,8 @@ device_lib_t* loadDeviceLib(const char *libpath, char* errbuf)
     void *handle = dlopen(libpath, RTLD_NOW);
 
     if (!handle) {
-        snprintf(errbuf, 1024, "unable to open dl handle");
+        const char *dlerr = dlerror();
+        snprintf(errbuf, 1024, "unable to open dl handle: %s", dlerr);
         free(dev);
         return NULL;
     }