How to use relative path in library GTK+ gtk_builder_add_from_file (builder, "example.xml", NULL); ?

Hi everyone,

if i use relative path won`t working to me:

gtk_builder_add_from_file (builder, "builder.xml", NULL);

Error output:

(example3_1:5680): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(example3_1:5680): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(example3_1:5680): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(example3_1:5680): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(example3_1:5680): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(example3_1:5680): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(example3_1:5680): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(example3_1:5680): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

But i use absolute path work to me:

gtk_builder_add_from_file (builder, "/root/CLionProjects/example3.1/builder.xml", NULL);

My CMakeLists.txt

cmake_minimum_required(VERSION 3.9)
project(example3_1 C)

set(CMAKE_C_STANDARD 99)


find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK3 REQUIRED gtk+-3.0)

include_directories(${GTK3_INCLUDE_DIRS})
link_directories(${GTK3_LIBRARY_DIRS})

add_definitions(${GTK3_CFLAGS_OTHER})

add_executable(example3_1 main.c)

target_link_libraries(example3_1 ${GTK3_LIBRARIES})