How to create executable file on linux (ubuntu 21.04)?

Question

I have next CMakeLists.txt file on my ubuntu 21.04:

cmake_minimum_required(VERSION 3.10)

# set the project name
project(gtk4-my)

# add the executable
add_executable(gtk4-my gtk4-my.c)


# gtk4
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK4 REQUIRED gtk4)
include_directories(${GTK4_INCLUDE_DIRS})
link_directories(${GTK4_LIBRARY_DIRS})
add_definitions(${GTK4_CFLAGS_OTHER})

# Use the package PkgConfig to detect GTK+ headers/library files
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK REQUIRED gtkmm-3.0)
target_link_libraries(gtk4-my PRIVATE ${GTKMM_LIBRARIES})
# Add other flags to the compiler
target_compile_definitions(gtk4-my PRIVATE ${GTKMM_CFLAGS_OTHER})
# Setup CMake to use GTK+, tell the compiler where to look for headers
# and to the linker where to look for libraries
target_include_directories(gtk4-my PRIVATE ${GTKMM_INCLUDE_DIRS})
target_link_directories(gtk4-my PRIVATE ${GTKMM_LIBRARY_DIRS})

# specify the C++ standard
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED True)

I did command: cmake folder

root@user-PC:/home/user/test123# cmake my123
-- Configuring done
-- Generating done
-- Build files have been written to: /home/user/test123

all is good.

Now I do command: make and I get next errors:

root@user-PC:/home/user/test123# make
[ 50%] Linking C executable gtk4-my
/usr/bin/ld: CMakeFiles/gtk4-my.dir/gtk4-my.c.o: in function `glib_autoptr_clear_GtkApplication':
gtk4-my.c:(.text+0x1b): undefined reference to `g_object_unref'
/usr/bin/ld: CMakeFiles/gtk4-my.dir/gtk4-my.c.o: in function `activate':
gtk4-my.c:(.text+0x5d): undefined reference to `gtk_application_window_new'
/usr/bin/ld: gtk4-my.c:(.text+0x66): undefined reference to `gtk_window_new'
/usr/bin/ld: gtk4-my.c:(.text+0x6f): undefined reference to `gtk_application_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0x81): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0x89): undefined reference to `gtk_window_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0x9b): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0xa6): undefined reference to `gtk_window_set_application'
/usr/bin/ld: gtk4-my.c:(.text+0xab): undefined reference to `gtk_window_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0xbd): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0xcf): undefined reference to `gtk_window_set_default_size'
/usr/bin/ld: gtk4-my.c:(.text+0xdb): undefined reference to `gtk_widget_show'
/usr/bin/ld: gtk4-my.c:(.text+0xe7): undefined reference to `gtk_label_new'
/usr/bin/ld: gtk4-my.c:(.text+0xf0): undefined reference to `gtk_window_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0x102): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0x114): undefined reference to `gtk_window_set_child'
/usr/bin/ld: gtk4-my.c:(.text+0x120): undefined reference to `gtk_widget_show'
/usr/bin/ld: gtk4-my.c:(.text+0x12f): undefined reference to `gtk_box_new'
/usr/bin/ld: gtk4-my.c:(.text+0x138): undefined reference to `gtk_box_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0x14a): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0x157): undefined reference to `gtk_box_set_homogeneous'
/usr/bin/ld: gtk4-my.c:(.text+0x15c): undefined reference to `gtk_window_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0x16e): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0x180): undefined reference to `gtk_window_set_child'
/usr/bin/ld: gtk4-my.c:(.text+0x18c): undefined reference to `gtk_button_new_with_label'
/usr/bin/ld: gtk4-my.c:(.text+0x1ac): undefined reference to `gtk_window_close'
/usr/bin/ld: gtk4-my.c:(.text+0x1bb): undefined reference to `g_signal_connect_data'
/usr/bin/ld: gtk4-my.c:(.text+0x1c7): undefined reference to `gtk_button_new_with_label'
/usr/bin/ld: gtk4-my.c:(.text+0x1e9): undefined reference to `gtk_window_close'
/usr/bin/ld: gtk4-my.c:(.text+0x1f8): undefined reference to `g_signal_connect_data'
/usr/bin/ld: gtk4-my.c:(.text+0x1fd): undefined reference to `gtk_box_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0x20f): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0x221): undefined reference to `gtk_box_append'
/usr/bin/ld: gtk4-my.c:(.text+0x226): undefined reference to `gtk_box_get_type'
/usr/bin/ld: gtk4-my.c:(.text+0x238): undefined reference to `g_type_check_instance_cast'
/usr/bin/ld: gtk4-my.c:(.text+0x24a): undefined reference to `gtk_box_append'
gtk4-my.c:(.text+0x28f): undefined reference to `gtk_application_new'
/usr/bin/ld: gtk4-my.c:(.text+0x2be): undefined reference to `g_signal_connect_data'
/usr/bin/ld: gtk4-my.c:(.text+0x2c3): undefined reference to `g_application_get_type

Try using [`IMPORTED_TARGET`](https://stackoverflow.com/a/57224542/5494370) — Alan Birtles, Oct 10 '21 at 06:48
Shouldn't pkg_check_modules(GTK REQUIRED gtkmm-3.0) be pkg_check_modules(GTKMM REQUIRED gtkmm-3.0)? — stark, Oct 10 '21 at 11:41
Why are you linking a c program to gtkmm? But you are not linking to `gtk4`. Maybe you should add `link_libraries(${GTK4_LIBRARIES})` or `target_link_libraries(gtk4-my PRIVATE ${GTK4_LIBRARIES})`? — HAL9000, Oct 10 '21 at 12:35
Yes, all is good. Next your string ` target_link_libraries(gtk4-my PRIVATE ${GTK4_LIBRARIES})` is working for me on my ubuntu 21.04 os. — aleks_yolp, Oct 10 '21 at 12:47
@АлексейНеудачин, this has nothing to do with `gcc` vs `clang`. — HAL9000, Oct 10 '21 at 12:47
@aleks_yolp, I see yo have the command line prompt `root@user-PC:/home/user/test123#`. Does that mean that you are logged in as root while developing? This is bad practice. Log in as normal user, and use `sudo` when you need to execute a command as root. Only log in as root (with `su`) when you need to do multiple administrative task on your computer, and using `sudo` is not practical. — HAL9000, Oct 10 '21 at 12:53
you need to know how to do it without `make` to do it with `make` — Алексей Неудачин, Oct 10 '21 at 13:08

How to create executable file on linux (ubuntu 21.04)?

0 Answers0