+if [ $have_gl_winsys -eq 0 ]; then
+ errors=$((errors + 1))
+fi
+
+printf " Checking for X11... "
+have_x11=No
+if pkg-config --exists x11; then
+ printf "Yes.\n"
+ have_x11=Yes
+ x11_cflags=$(pkg-config --cflags x11)
+ x11_ldflags=$(pkg-config --libs x11)
+else
+ printf "No.\n"
+fi
+
+printf " Checking for EGL/egl.h... "