-AC_ARG_WITH(vorbis,[ --with-vorbis=PFX Prefix where libvorbis is installed (optional)], vorbis_prefix="$withval", vorbis_prefix="")
-AC_ARG_WITH(vorbis-libraries,[ --with-vorbis-libraries=DIR Directory where libvorbis library is installed (optional)], vorbis_libraries="$withval", vorbis_libraries="")
-AC_ARG_WITH(vorbis-includes,[ --with-vorbis-includes=DIR Directory where libvorbis header files are installed (optional)], vorbis_includes="$withval", vorbis_includes="")
-AC_ARG_ENABLE(vorbistest, [ --disable-vorbistest Do not try to compile and run a test Vorbis program],, enable_vorbistest=yes)
+AC_ARG_WITH(vorbis,AC_HELP_STRING([--with-vorbis=PFX],[Prefix where libvorbis is installed (optional)]), vorbis_prefix="$withval", vorbis_prefix="")
+AC_ARG_WITH(vorbis-libraries,AC_HELP_STRING([--with-vorbis-libraries=DIR],[Directory where libvorbis library is installed (optional)]), vorbis_libraries="$withval", vorbis_libraries="")
+AC_ARG_WITH(vorbis-includes,AC_HELP_STRING([--with-vorbis-includes=DIR],[Directory where libvorbis header files are installed (optional)]), vorbis_includes="$withval", vorbis_includes="")
+AC_ARG_ENABLE(vorbistest,AC_HELP_STRING([--disable-vorbistest],[Do not try to compile and run a test Vorbis program]),, enable_vorbistest=yes)