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.Dd July 18, 2007
.Dt BUILD.DEP.MK 5
.Os
.ds vT BSDBuild Reference
.ds oS BSDBuild 1.0
.Sh NAME
.Nm build.dep.mk
.Nd bsdbuild - dependency generation
.Sh SYNOPSIS
.Fd .include <bsd.dep.mk>
.Sh DESCRIPTION
The
.Nm
module is used by
.Xr build.prog.mk 5
and
.Xr build.lib.mk 5 ,
but is never included directly into makefiles.
Its role is to generate
.Pa .depend
files, which are used in the build process to determine if object files need
to be rebuilt.
.Sh TARGETS
.Bl -tag -width "depend "
.It Ar depend
Generate a
.Pa .depend
file by invoking the compiler with the
.Ar -M
flag.
.It Ar clean-depend
Clean up the
.Pa .depend
file.
.El
.Sh VARIABLES
.Bl -tag -width "MKDEP "
.It Ev MKDEP
Path to
.Xr mkdep 1
utility.
Defaults to
.Sq ${TOP}/mk/mkdep ,
which is bundled with BSDBuild.
.It Ev CC
Compiler command to invoke (must support the
.Ar -M
option).
.El
.Sh SEE ALSO
.Xr build.common.mk 5 ,
.Xr build.prog.mk 5 ,
.Xr build.lib.mk 5
.Sh HISTORY
.Nm
first appeared in BSDBuild 1.0.
.Pp
BSDBuild is based on the 4.4BSD build system.