(See commit log for usr.bin/xlint/Makefile,v 1.11 for what was wrong
with enabling build of lint libraries in rev. 1.12.)
This fixes cross-arch compiles (running binaries for a different arch
when generating lint.7 and lint libraries) and cross-branch compiles
(4.x -> 5.0 buildworld should be working again).
"env name=value ... cmd ..." was just a pessimized way of doing
"name=value ... cmd ...". Note that make(1) can't optimize
either of these to an exec of env(1) or "cmd" even if the second
"..." is simple, since it can't tell that the shell metacharacter
in "name=value" is actually handled by env(1).
Use this where we are now using /etc/make.conf.
This allows people to override the current default of always including
/etc/make.conf. Setting __MAKE_CONF to /dev/null disables it
completely, while setting it to something else allows one to override
what is on the system. This can be desirable in situations where a
machine has many users and some of them want different defaults, or
defaults appropriate to cross building to be different than those for
normal building.
Not objected to by: arch@
lint, so this is turned off by default. Setting WANT_LINT will turn
on generation of lint libraries for /usr/libdata/lint/*.ln.
Reviewd by: silence in -audit.
* Document the LOCAL_SCRIPT option.
* Document the NOPORTREADMES option.
* Be more specific in a comment.
* Be more specific about the ftp.1 and cdrom.1 targets.
* Clarify the usage of the CVSROOT variable.
* Clarify the usage of the NODOC variable.
Suggested by: matusita
