m4 - Man Page

--help

display this help and exit

--version

output version information and exit

-E,  --fatal-warnings

once: warnings become errors, twice: stop execution at first error

-i,  --interactive

unbuffer output, ignore interrupts

-P,  --prefix-builtins

force a `m4_' prefix to all builtins

-Q,  --quiet,  --silent

suppress some warnings for builtins

--warn-macro-sequence[=REGEXP]

warn if macro definition matches REGEXP,

default \$\({[^}]*}\|[0-9][0-9]+\)

-W,  --word-regexp=REGEXP

use REGEXP for macro name syntax

-D, --define=NAME[=VALUE]

define NAME as having VALUE, or empty

-I,  --include=DIRECTORY

append DIRECTORY to include path

-s,  --synclines

generate `#line NUM "FILE"' lines

-U,  --undefine=NAME

undefine NAME

-g,  --gnu

override -G to re-enable GNU extensions

-G,  --traditional

suppress all GNU extensions

-H,  --hashsize=PRIME

set symbol lookup hash table size [509]

-L,  --nesting-limit=NUMBER

change nesting limit, 0 for unlimited [0]

-F,  --freeze-state=FILE

produce a frozen state on FILE at end

-R,  --reload-state=FILE

reload a frozen state from FILE at start

-d,  --debug[=FLAGS]

set debug level (no FLAGS implies `aeq')

--debugfile[=FILE]

redirect debug and trace output to FILE (default stderr, discard if empty string)

-l,  --arglength=NUM

restrict macro tracing size

-t,  --trace=NAME

trace NAME when it is defined

a

show actual arguments

c

show before collect, after collect and after call

e

show expansion

f

say current input file name

i

show changes in input files

l

say current input line number

p

show results of path searches

q

quote values as necessary, with a or e flag

t

trace for all macro calls, not only traceon'ed

x

add a unique macro call id, useful with c flag

V

shorthand for all of the above flags

If defined, the environment variable `M4PATH' is a colon-separated list of directories included after any specified by `-I'.

Exit status is 0 for success, 1 for failure, 63 for frozen file version mismatch, or whatever value was passed to the m4exit macro.