Hello and welcome,
You do not say what versions of the libraries you are using and what version of Glade. This makes a big difference.
The most likely problem is that you have most added the libglade headers and libraries to the search path.
Note that libglade has been replaced with GtkBuilder which is part of GTK+ since version 2.12 and the latest version in the 2 series is 2.24
i use glade 3.8 vs libglade 2.0 gtk-2.0
first,, i desgin a window by glade and save it is "text.glade"
then code main.c that i post before
and code this in terminal : gcc -o main main.c `pkg-config --cflags --libs gtk+-2.0 gmodule-2.0` error glade/glade.h not such ....