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33 .Nd construct Makefile dependency list
43 utility takes a set of flags for the C compiler and a list
44 of C source files as arguments and constructs a set of include
45 file dependencies which are written into the file ``.depend''.
46 An example of its use in a Makefile might be:
47 .Bd -literal -offset indent
48 CFLAGS= -O -I../include
52 mkdep ${CFLAGS} ${SRCS}
55 where the macro SRCS is the list of C source files and the macro
56 CFLAGS is the list of flags for the C compiler.
58 The user has the ability to change the preprocessor and preprocessor options
62 as the preprocessor and to ignore system
63 headers, one would use
64 .Bd -literal -offset indent
66 env MKDEP_CPP="cc -E" MKDEP_CPP_OPTS=-MM mkdep \\
70 The options are as follows:
73 Append to the output file,
76 may be run from a single Makefile.
78 Write the include file dependencies to
80 instead of the default ``.depend''.
84 to produce dependencies of the form:
85 .Bd -literal -offset indent
89 so that subsequent makes will produce
91 directly from its C module rather than using an intermediate
94 This is useful for programs whose source is contained in a single
98 .Bl -tag -width MKDEP_CPP_OPTS
100 Specifies the C compiler to use.
101 The specified compiler is expected to have
102 options consistent with the GNU C compiler.
106 Specifies the preprocessor to use.
107 The default is "${CC} -E".
108 .It Ev MKDEP_CPP_OPTS
109 Specifies the non-CFLAGS options for the preprocessor.
114 .Bl -tag -width .depend -compact
116 File containing list of dependencies.