[gst-head] computer-di-giovanni-bedetti:/Users/Giovi/Desktop/gstreamer/sorgenti root# gcc -Wall $(pkg-config --cflags --libs gstreamer-0.10) helloworld.c -o helloworld
/usr/bin/ld: /Users/Giovi/Desktop/gstreamer/sources/gstreamer/head/gstreamer/pkgconfig/../gst/libgstreamer-0.10.la bad magic number (not a Mach-O file)
collect2: ld returned 1 exit status