# If the system has /usr/include/popt/popt.h, we enable the
# included popt because an attempt to "#include <popt/popt.h>"
# would use our included header file anyway (due to -I.), and
# If the system has /usr/include/popt/popt.h, we enable the
# included popt because an attempt to "#include <popt/popt.h>"
# would use our included header file anyway (due to -I.), and