After reading Makefile and all the files that are included using .include
or .sinclude directives (source Makefiles) make considers each source
Makefile as a target and tries to rebuild it. Both explicit and implicit
rules are checked and all source Makefiles are updated if necessary. If
any of the source Makefiles were rebuilt, make restarts from clean state.
To prevent infinite loops the following source Makefile targets are
ignored:
- :: targets that have no prerequisites but have commands
- ! targets
- targets that have .PHONY or .EXEC attributes
- targets without prerequisites and without commands
When remaking a source Makefile options -t (touch target), -q (query
mode), and -n (no exec) do not take effect, unless source Makefile is
specified explicitly as a target in make command line.
Additionally, system makefiles and .depend are not considered as a
Makefiles that can be rebuilt.
Reviewed by: harti
before executing the shell. Until now this was done when the default
shell was the ksh. This failed if the default shell was sh or csh and
the user switched to ksh.
and tabs. This is still not correct for command line variable values
ending in a backslash because this would require a larger effort.
Document this limitation in the BUGS section of the man page. The
quoting is mostly compatible with that of gmake and smake.
Tested by: Max Okumoto and Joerg Sonnenberger from DragonFly BSD
Reviewed by: ru (man page, partly)
as environment variables and should not be set on make's command
line. They happen to work accidentially as command line variables
too when none of the sub-makes wants to play games with them (because
make is putting command line variables into the environment and will
find them there later on). Makefile.inc1 wants to change
MAKEOBJDIRPREFIX. In this case one cannot set it on the command line.
the MFLAGS target. Document that variable assignments from the MAKEFLAGS
environment variable and the .MAKEFLAGS and .MFLAGS target have the
same precedence as command line variable assignments.
to be executed even when -n is given on the command line to make. This is
very handy for calls to submakes.
This is slightly changed from the original patch as obtained from NetBSD.
The NetBSD variant prints lines which have both '+' and '@' when -n
is specified. The commited version always obeys '@'.
Bump MAKE_VERSION so Makefiles can use this conditionally.
PR: standards/66357 (partly)
Submitted by: Mark Baushke <mdb@juniper.net>
Obtained from: NetBSD
Replace the use of '=' in conditionals in the examples
by the more correct '=='.
Clarify the example explaining that .for expansion takes place before
.if handling by showing the correct code instead of saying 'the other
way around'. Change a variable name there so the example is more parseable
to the human reader.
PR: docs/65400
Submitted by: Roman Neuhauser <neuhauser@chello.cz>
from the :S modifier which follows a bit further below. This way the
reader can read each of these two descriptions without having to jump
back and forth in the manpage.
PR: docs/26943
Submitted by: Alex Kapranoff <alex@kapran.bitmcnit.bryansk.su>
Use
make -V .MAKEFILE_LIST | tr \ \\n | awk '$0==".." {l--; next} {l++; printf "%*s%s\n", l, " ", $0}'
to print a tree of all included makefiles.
Approved by: joerg
MFC after: 1 week
into a separate function, Dir_InitDot().
- Postpone the current and object directories detection (and caching
of the "." directory) until after all command line arguments are
parsed. This makes the -C option DTRT.
PR: bin/47149
this particular GNU flag. It changes into the given directory for the
operation in question. This just goes into said directory at the time of
parsing the argument for getopt(3).
Submitted by: Rachel Hestilow <rachel@jerkcity.com>
