NAME
mkdep —
construct Makefile dependency
list
SYNOPSIS
mkdep |
[-aDdiopqv]
[-f file]
[-P
prefix]
[-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''.
-
-
- -i
- When -d or -D is used,
instead of inlining the contents of the files to the resulting depend
file, use include statements to include the source dependency files.
-
-
- -o
- Add an additional .OPTIONAL line for each dependent
file.
-
-
- -P
- Prepend the string given in prefix to
every target filename. This is useful for programs that have source files
in multiple subdirectories and a single Makefile that references all of
them explicitly (without using the VPATH functionality because there can
be files with the same name in each subdirectory).
-
-
- -p
- Cause mkdep to produce dependencies of
the form:
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.
-
-
- -v
- print debugging output.
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.