mkdep
—
construct Makefile dependency list
mkdep |
[-aDdiopqv ] [-f
file] [-P
prefix] [-s
suffixes] --
[flags] file ... |
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.
- .depend
- File containing list of dependencies.
The mkdep
command appeared in
4.3BSD-Tahoe.
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.