NAME
mkdep —
construct Makefile dependency
list
SYNOPSIS
mkdep |
[-ap] [-f
file] [flags]
file ... |
DESCRIPTION
Themkdep utility 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 user has the ability to change the preprocessor and preprocessor options used. For instance, to use gcc as the preprocessor and to ignore system headers, one would use
depend:
env MKDEP_CPP="gcc -E" MKDEP_CPP_OPTS=-MM mkdep \
${CFLAGS} ${SRCS}
The options are as follows:
-a- Append to the output file, so that multiple
mkdep's may be run from a single Makefile. -f- Write the include file dependencies to file, instead of the default ``.depend''.
-p- Cause
mkdepto produce dependencies of the form:program: program.c
so that subsequent makes will produce program directly from its C module rather than using an intermediate .o module. This is useful for programs whose source is contained in a single module.
ENVIRONMENT
CC- Specifies the C compiler to use. The specified compiler is expected to have options consistent with the GNU C compiler.
MKDEP_CPP- Specifies the preprocessor to use. The default is "${CC} -E".
MKDEP_CPP_OPTS- Specifies the non-CFLAGS options for the preprocessor. The default is "-M".
FILES
- .depend
- File containing list of dependencies.
SEE ALSO
HISTORY
The mkdep command appeared in
4.3BSD-Tahoe.