MKDEP(1)

NAME
mkdep - construct Makefile dependency list

SYNOPSIS
mkdep [-aDdopq] [-f file] [-s suffixes] -- [flags] file ...

DESCRIPTION
mkdep takes a set of flags for the C compiler and a list of C source files as arguments and constructs a set of include file dependencies which are written into the file ``.depend''. An example of its use in a Makefile might be:

    CFLAGS= -O -I../include
    SRCS= file1.c file2.c
    depend:
    	mkdep -- ${CFLAGS} ${SRCS}

where the macro SRCS is the list of C source files and the macro CFLAGS is the list of flags for the C compiler.

The options are as follows:

-a  Append to the output file, so that multiple mkdep's may be run from a single Makefile.

-D  Post process (as -d) but read the list of filenames from stdin.

-d  Post process and merge previously created (for example by “cc -MD x.c”) depend files into a single file.

-f  Write the include file dependencies to file, instead of the default ``.depend''.

-o  Add an additional .OPTIONAL line for each dependent file.

-p  Cause mkdep to produce dependencies of the form:

        program: program.c

    so that subsequent makes will produce program directly from its C module rather than using an intermediate.o module. This is useful for programs whose source is contained in a single module. -p is equivalent to specifying a null suffix with -s.

-q  Do not print a warning for inaccessible files when -d is given.

-s  Expand each target filename to a list, replacing the ‘.o’ suffix with each element of suffixes. The list of suffixes may be space or comma separated.

FILES
.depend
    File containing list of dependencies.

SEE ALSO
cc(1), cpp(1), make(1)

HISTORY
The mkdep command appeared in 4.3BSD Tahoe.

BUGS
Some characters special to make(1), most notably the comment character, are not escaped correctly if they appear in file names. This can lead to unparseable output or silently cause dependencies to be lost.