echo "  --with-iconv[=iconv-path]      enables iconv support"

	echo "  --with-psp-config[=psp-config] enables psp-config support (PSP ONLY)"

	echo "  --disable-builtin-depend       disable use of builtin deps finder"

	echo "  --with-makedepend[=makedepend] enables makedepend support"

	echo "  --with-ccache                  enables ccache support"

	echo "  --with-distcc                  enables distcc support"

	echo ""

	echo "Some influential environment variables:"

	echo "  CC                             C compiler command"

	echo "  CXX                            C++ compiler command"

	echo "  CFLAGS                         C compiler flags"

	echo "  CXXFLAGS                       C++ compiler flags"