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32 .\" @(#)mkdep.1 8.1 (Berkeley) 6/6/93
40 .Nd construct Makefile dependency list
49 takes a set of flags for the C compiler and a list
50 of C source files as arguments and constructs a set of include
51 file dependencies which are written into the file ``.depend''.
52 An example of its use in a Makefile might be:
53 .Bd -literal -offset indent
54 CFLAGS= -O -I../include
58 mkdep ${CFLAGS} ${SRCS}
61 where the macro SRCS is the list of C source files and the macro
62 CFLAGS is the list of flags for the C compiler.
64 The user has the ability to change the preprocessor and preprocessor options
65 used. For instance, to use gcc as the preprocessor and to ignore system
66 headers, one would use
67 .Bd -literal -offset indent
69 env MKDEP_CPP="gcc -E" MKDEP_CPP_OPTS=-MM mkdep \\
73 The options are as follows:
76 Append to the output file,
79 may be run from a single Makefile.
81 Write the include file dependencies to
83 instead of the default ``.depend''.
87 to produce dependencies of the form:
88 .Bd -literal -offset indent
92 so that subsequent makes will produce
94 directly from its C module rather than using an intermediate
97 This is useful for programs whose source is contained in a single
101 .Bl -tag -width MKDEP_CPP_OPTS
103 Specifies the C compiler to use. The specified compiler is expected to have
104 options consistent with the GNU C compiler.
106 Specifies the preprocessor to use. The default is "${CC} -E".
107 .It Ev MKDEP_CPP_OPTS
108 Specifie the non-CFLAGS options for the preprocessor. The default is
116 .Bl -tag -width .depend -compact
118 File containing list of dependencies.