How to add gtk lib in Visual studio code? - c

Question

I try to add gtk library to my file in Visual Studio code on my Arch Linux ,but it underlines "#include line and writes:
#include errors detected. Please update your includePath. Squiggles are disabled for this translation unit (/home/mikhailkhr/My projects/C projects/Test/Test.c).
cannot open source file "glibconfig.h" (dependency of "gtk/gtk.h")
It does compile this file with:
gcc `pkg-config gtk+-3.0 --cflags` ProgName.c `pkg-config gtk+-3.0 --libs`
But why does it underline this?
And how to fix this?
Thanks.
Sorse code:
#define _PROGRAM_NAME "whoami"
#include <stdlib.h>
#include <pwd.h>
#include <stdio.h>
#include <gtk/gtk.h>
const char *getUserName()
{
uid_t uid = geteuid();
struct passwd *pw = getpwuid(uid);
if (pw)
{
return pw->pw_name;
}
return "";
}
static void
print_hello (GtkWidget *widget,
gpointer data)
{
g_print ("Hello %s\n", getUserName());
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
GtkWidget *window;
GtkWidget *button;
GtkWidget *button_box;
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "Window");
gtk_window_set_default_size (GTK_WINDOW (window), 200, 200);
button_box = gtk_button_box_new (GTK_ORIENTATION_HORIZONTAL);
gtk_container_add (GTK_CONTAINER (window), button_box);
button = gtk_button_new_with_label (getUserName());
g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);
g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
gtk_container_add (GTK_CONTAINER (button_box), button);
gtk_widget_show_all (window);
}
int
main (int argc,
char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}

Answer 1

Add /usr/lib/glib-2.0/include/ to the include paths.
Basically one wants to add the output from pkg-config to the VSCode includes.
To dump the output on a shell, use:
echo $(pkg-config --libs --cflags gtk+-3.0)
If you want to provide pkg-config as a VSCode task argument see this answer.
I am happily using this VSCode extension with GCC and Clang.
Here is my gist to kick off coding GTK 3 in C with VSCode.
Happy hacking!

Answer 2

I added this to the include path inside .vscode/c_cpp_properties.json:
"includePath": [
"${workspaceFolder}/**",
"/usr/include/gtk-3.0",
"/usr/include/glib-2.0",
"/usr/lib/x86_64-linux-gnu/glib-2.0/include",
"/usr/include/pango-1.0",
"/usr/include/harfbuzz",
"/usr/include/cairo",
"/usr/include/gdk-pixbuf-2.0",
"/usr/include/atk-1.0"
],
If you need gtkmm:
"/usr/include/gtkmm-3.0",
"/usr/include/glibmm-2.4",
"/usr/include/sigc++-2.0",
"/usr/lib/x86_64-linux-gnu/sigc++-2.0/include",
"/usr/lib/x86_64-linux-gnu/glibmm-2.4/include",
"/usr/include/giomm-2.4/giomm",
"/usr/include/giomm-2.4",
"/usr/include/glibmm-2.4",
"/usr/include/glibmm-2.4/glibmm",
"/usr/lib/x86_64-linux-gnu/giomm-2.4/include",
"/usr/include/gdkmm-3.0",
"/usr/lib/x86_64-linux-gnu/gdkmm-3.0/include",
"/usr/include/pangomm-1.4",
"/usr/lib/x86_64-linux-gnu/pangomm-1.4/include",
"/usr/include/cairomm-1.0",
"/usr/include/freetype2",
"/usr/lib/x86_64-linux-gnu/gtkmm-3.0/include",
"/usr/lib/x86_64-linux-gnu/atkmm-1.6/include",
"/usr/include/atkmm-1.6"

Answer 3

If you open gtk/gtk.h (F12 go to definition):
You'll see a bunch of other red lines:
Which, generally saying, is your error message.
In most cases, if you open 1 of those header files , you'll see that some header path is missing (non related to gtk/ core , pango in this case):
Simply search the name (pango as example here) under your include directory (mine one is C:\msys64\mingw64\include under the Windows):
Now, when you're sure it's installed (install it in case of opposite answer) you need to create .vscode folder under your working-project directory and create a file c_cpp_properties.json
In this file you will tell to VSCode, where the required header files are stored:
{
"configurations": [
{
"name": "Win32",
"includePath": [ "C:\\msys64\\mingw64\\include\\pango-1.0" , "C:\\msys64\\mingw64\\include\\gtk-3.0" ,"C:\\msys64\\mingw64\\include", "C:\\msys64\\mingw64\\include\\glib-2.0"],
"intelliSenseMode": "gcc-x64",
"compilerPath": "C:\\msys64\\mingw64\\bin\\gcc.exe",
"cStandard": "gnu11",
"cppStandard": "gnu++14"
}
],
"version": 4
}
(Full documentation about properties of the file you can find here)
Which solves one of the previous errors:
You should repeat and add those pathes into the includePath property untill it will be fully solved.