Operation modes:

-h, --help

print this help, then exit

-V, --version

print version number, then exit

-v, --verbose

verbosely report processing

-d, --debug

don't remove temporary files

-f, --force

consider all files obsolete

-o, --output=FILE

save output in FILE (stdout is the default)

-W, --warnings=CATEGORY

report the warnings falling in CATEGORY [syntax]

Warning categories include:

`cross'

cross compilation issues

`obsolete'

obsolete constructs

`syntax'

dubious syntactic constructs

`all'

all the warnings

`no-CATEGORY'

turn off the warnings on CATEGORY

`none'

turn off all the warnings

`error'

warnings are error

The environment variables `M4' and `WARNINGS' are honored.

Library directories:

-B, --prepend-include=DIR

prepend directory DIR to search path

-I, --include=DIR

append directory DIR to search path

Tracing:

-t, --trace=MACRO[:FORMAT]

report the list of calls to MACRO

-i, --initialization

also trace Autoconf's initialization process

In tracing mode, no configuration script is created. FORMAT defaults to `$f:$l:$n:$%'; see `autom4te --help' for information about FORMAT.