Thanks for your reply.
Here it is:
-------------- Clean: Debug in test (compiler: GNU GCC Compiler)---------------
Cleaned "test - Debug"
-------------- Build: Debug in test (compiler: GNU GCC Compiler)---------------
gcc.exe -Wall -mms-bitfields -g -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include\gtk-2.0 -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include\cairo -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include\gdk -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include\glib-2.0 -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\lib\glib-2.0\include -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include\pango-1.0 -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\lib\gtk-2.0\include -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include\atk-1.0 -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk"\include\gdk-pixbuf-2.0 -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\include" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\include\gtk-2.0" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\include\cairo" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\include\glib-2.0" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\glib-2.0\include" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\include\pango-1.0" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\include\atk-1.0" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\include\gdk-pixbuf-2.0" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gtk-2.0\include" -I"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib" -c C:\Users\wajnberg\Desktop\test\main.c -o obj\Debug\main.o
gcc.exe -L"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib" -L"C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib" -o bin\Debug\test.exe obj\Debug\main.o -lgtk-win32-2.0 -lgobject-2.0 -lglib-2.0 "C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gobject-2.0.lib" "C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\glib-2.0.lib" "C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\pango-1.0.lib" "C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gtk-win32-2.0.lib" "C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gdk-win32-2.0.lib" "C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\cairo.lib"
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgtk-win32-2.0.dll.a when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gtk-win32-2.0.lib when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgtk-win32-2.0.dll.a when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gtk-win32-2.0.lib when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgtk-win32-2.0.dll.a when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gtk-win32-2.0.lib when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gtk-win32-2.0.lib when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgtk-win32-2.0.dll.a when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gtk-win32-2.0.lib when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gtk-win32-2.0.lib when searching for -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgtk-win32-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgobject-2.0.dll.a when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gobject-2.0.lib when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgobject-2.0.dll.a when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gobject-2.0.lib when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgobject-2.0.dll.a when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gobject-2.0.lib when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gobject-2.0.lib when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libgobject-2.0.dll.a when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/gobject-2.0.lib when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\gobject-2.0.lib when searching for -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgobject-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libglib-2.0.dll.a when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/glib-2.0.lib when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libglib-2.0.dll.a when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/glib-2.0.lib when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libglib-2.0.dll.a when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/glib-2.0.lib when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\glib-2.0.lib when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/libglib-2.0.dll.a when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib/glib-2.0.lib when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible C:\Program Files (x86)\CodeBlocks\MinGW\gtk\lib\glib-2.0.lib when searching for -lglib-2.0
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lglib-2.0
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 1 second(s))
4 error(s), 0 warning(s) (0 minute(s), 1 second(s))
GTK is installed here: C:\Program Files (x86)\CodeBlocks\MinGW\gtk
Thanks in advance for your help!
Eric.