04-12-2007
Makefile help
Hi,
What I want to do is for make to reconstruct the target even if its dependencies have not changed. So, even if if the dependent files do not have a more recent timestamp, the commands are executed.
The reason I want to do this..
1)someone executes make on solaris. We have a solaris binary.
2) Now someone should be able to run make on linux to generate the linux binary. (Without executing make clean to remove the already existing binary and .o file)
does anyone know how to do this ?
Thanks !!!
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MKDEP(1) BSD General Commands Manual 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.
BSD
October 15, 2010 BSD