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28 .\" @(#)mkdep.1 8.1 (Berkeley) 6/6/93
29 .\" $FreeBSD: src/usr.bin/mkdep/mkdep.1,v 1.7.2.7 2002/12/29 16:35:40 schweikh Exp $
30 .\" $DragonFly: src/usr.bin/mkdep/mkdep.1,v 1.3 2006/02/17 19:39:09 swildner Exp $
37 .Nd construct Makefile dependency list
47 utility takes a set of flags for the C compiler and a list
48 of C source files as arguments and constructs a set of include
49 file dependencies which are written into the file ``.depend''.
50 An example of its use in a Makefile might be:
51 .Bd -literal -offset indent
52 CFLAGS= -O -I../include
56 mkdep ${CFLAGS} ${SRCS}
59 where the macro SRCS is the list of C source files and the macro
60 CFLAGS is the list of flags for the C compiler.
62 The user has the ability to change the preprocessor and preprocessor options
63 used. For instance, to use gcc as the preprocessor and to ignore system
64 headers, one would use
65 .Bd -literal -offset indent
67 env MKDEP_CPP="gcc -E" MKDEP_CPP_OPTS=-MM mkdep \\
71 The options are as follows:
74 Append to the output file,
77 may be run from a single Makefile.
79 Write the include file dependencies to
81 instead of the default ``.depend''.
85 to produce dependencies of the form:
86 .Bd -literal -offset indent
90 so that subsequent makes will produce
92 directly from its C module rather than using an intermediate
95 This is useful for programs whose source is contained in a single
99 .Bl -tag -width MKDEP_CPP_OPTS
101 Specifies the C compiler to use. The specified compiler is expected to have
102 options consistent with the GNU C compiler.
104 Specifies the preprocessor to use. The default is "${CC} -E".
105 .It Ev MKDEP_CPP_OPTS
106 Specifies the non-CFLAGS options for the preprocessor. The default is
110 .Bl -tag -width .depend -compact
112 File containing list of dependencies.