hi all! before this time i was using for compilling my gtk applications next command: #gcc myprogram.c `pkg-config gtk+-3.0.pc --libs --cflags` but now it doesnt work: Failed to open 'gtk+-3.0.pc': No such file or directory No package 'gtk+-3.0.pc' found but i have installed gtk+-3.0.pc file in /usr/lib/i386-linux-gnu/pkgconfig/gtk+-3.0.pc Why the file placed in such strange place (not in /usr/lib/pkgconfig/)? And how do i can avoid problem with searching for gtk+-3.0.pc?