.Pp

.Pp

.Nm

.Nm

will prepend the contents of the

will prepend the contents of the

environment variable to the command line arguments before parsing them.

environment variable to the command line arguments before parsing them.

.Pp

.Pp

The options are as follows:

The options are as follows:

Turn on debugging, and specify which portions of

Turn on debugging, and specify which portions of

.Nm

.Nm

are to print debugging information.

are to print debugging information.

Unless the flags are preceded by

Unless the flags are preceded by

.Ql \-

.Ql \-

they are added to the

they are added to the

environment variable and will be processed by any child make processes.

environment variable and will be processed by any child make processes.

By default, debugging information is printed to standard error,

By default, debugging information is printed to standard error,

but this can be changed using the

but this can be changed using the

.Ar F

.Ar F

Print debugging information about making targets, including modification

Print debugging information about making targets, including modification

dates.

dates.

.It Ar n

.It Ar n

These temporary scripts are created in the directory

These temporary scripts are created in the directory

referred to by the

referred to by the

.Ev TMPDIR

.Ev TMPDIR

.It Fl w

.It Fl w

Print entering and leaving directory messages, pre and post processing.

Print entering and leaving directory messages, pre and post processing.

.It Fl X

.It Fl X

individually.

individually.

Variables passed on the command line are still exported

Variables passed on the command line are still exported

via the

via the

environment variable.

environment variable.

This option may be useful on systems which have a small limit on the

This option may be useful on systems which have a small limit on the

size of command arguments.

size of command arguments.

.Ic .MAKE

.Ic .MAKE

The default is

The default is

.Ql Pa yes

.Ql Pa yes

.Fx 9.0

.Fx 9.0

and earlier.

and earlier.

.It Va .MAKE.DEPENDFILE

.It Va .MAKE.DEPENDFILE

making it easier to track the degree of parallelism being achieved.

making it easier to track the degree of parallelism being achieved.

.It Ev MAKEFLAGS

.It Ev MAKEFLAGS

The environment variable

The environment variable

may contain anything that

may contain anything that

may be specified on

may be specified on

.Nm Ns 's

.Nm Ns 's

Anything specified on

Anything specified on

.Nm Ns 's

.Nm Ns 's

command line is appended to the

command line is appended to the

variable which is then

variable which is then

entered into the environment for all programs which

entered into the environment for all programs which

.Nm

.Nm

Puts

Puts

.Nm

.Nm

into "meta" mode, where meta files are created for each target

into "meta" mode, where meta files are created for each target

.Xr filemon 4

.Xr filemon 4

is available, the system calls which are of interest to

is available, the system calls which are of interest to

.Nm .

.Nm .

.Ic .SILENT .

.Ic .SILENT .

.El

.El

.It Va .MAKE.META.BAILIWICK

.It Va .MAKE.META.BAILIWICK

match the directories controlled by

match the directories controlled by

.Nm .

.Nm .

If a file that was generated outside of

If a file that was generated outside of

.It Va .MAKEOVERRIDES

.It Va .MAKEOVERRIDES

This variable is used to record the names of variables assigned to

This variable is used to record the names of variables assigned to

on the command line, so that they may be exported as part of

on the command line, so that they may be exported as part of

This behavior can be disabled by assigning an empty value to

This behavior can be disabled by assigning an empty value to

.Ql Va .MAKEOVERRIDES

.Ql Va .MAKEOVERRIDES

within a makefile.

within a makefile.

Extra variables can be exported from a makefile

Extra variables can be exported from a makefile

by appending their names to

by appending their names to

.Ql Va .MAKEOVERRIDES .

.Ql Va .MAKEOVERRIDES .

is re-exported whenever

is re-exported whenever

.Ql Va .MAKEOVERRIDES

.Ql Va .MAKEOVERRIDES

is modified.

is modified.

.Ev ${.CURDIR}

.Ev ${.CURDIR}

.El

.El

.Pp

.Pp

so expressions such as

so expressions such as

.Dl ${.CURDIR:S,^/usr/src,/var/obj,}

.Dl ${.CURDIR:S,^/usr/src,/var/obj,}

may be used.

may be used.

.Xr ed 1 Ns \-style

.Xr ed 1 Ns \-style

string

string

.Ar replacement .

.Ar replacement .

.Ar pattern

.Ar pattern

in each word of the value is substituted with

in each word of the value is substituted with

.Ar replacement .

.Ar replacement .

When

When

.Nm

.Nm

is evaluating one of these conditional expressions, and it encounters

is evaluating one of these conditional expressions, and it encounters

.Dq make

.Dq make

or

or

.Dq defined

.Dq defined

.It Ic .OPTIONAL

.It Ic .OPTIONAL

If a target is marked with this attribute and

If a target is marked with this attribute and

.Nm

.Nm

.It Ic .PHONY

.It Ic .PHONY

The target does not

The target does not

correspond to an actual file; it is always considered to be out of date,

correspond to an actual file; it is always considered to be out of date,

rule for any target (that was used only as a

rule for any target (that was used only as a

source) that

source) that

.Nm

.Nm

Only the shell script is used.

Only the shell script is used.

The

The

.Ic .IMPSRC

.Ic .IMPSRC