configure --help documents --enable-option-checking only if some other AC_ARG_ENABLE is also used. However, of course it works also when no other --enable switch is specially handled by this configure, or when only AC_ARG_WITH's are used or none of either.
When --enable-option-checking is documented in --help output, it appears above the generic --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no) --enable-FEATURE[=ARG] include FEATURE [ARG=yes] lines; it should appear below. I realize I may be responsible for introducing these bugs. :-) Cheers, Ralf
