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make: remove unneeded conditional-compilation toggles

The toggles INCLUDES, LIBRARIES, POSIX, SYSVINCLUDE, SYSVVARSUB,
GMAKEEXPORT and SUNSHCMD are no longer needed, they were unconditionally
set.

The toggle NO_REGEX was configurable from the command line, but
disabling it would result in various error messages about the unknown
':C' modifier.

OK sjg@.

make(1): fix documentation of POSIX configuration

Empty commands are always allowed, whether in POSIX mode or not.

make(1): remove DEFMAXLOCAL and DEFMAXJOBS

These have been hard-wired all the time.  The word LOCAL doesn't make
sense anymore since the code for running jobs remotely has gone.

make(1): use space instead of tab for preprocessor directives

make(1): clean up headers, no functional change

make(1): remove USE_IOVEC

When a system call in a child process failed, there was no guarantee
that the error message would be written completely.  Using writev
correctly is harder than building the string in a buffer and then
writing it in the traditional way.

According to POSIX 2004, using memory allocation or even calling
write(2) from the child process invokes undefined behavior.  The
remaining code from make has done all this for several years now,
successfully, therefore adding one more of that won't hurt.

Make still tries to write the error message atomically by passing the
whole buffer at once to write(2), just as in the previous writev(2)
implementation.

make(1): fix punctuation and add paragraphs in config.h comments

make(1): mark LIBSUFF and RECHECK as independent build options

sync with head

Add a gmake inspired export command

sync with HEAD

Make it easier for the build environment (such as a configure script)
to override the default shell:

* Rename _BASENAME_DEFSHELL to DEFSHELL_CUSTOM, because it's no longer
  always a basename, it might be a full path;
* Rename DEFSHELL to DEFSHELL_INDEX, because it's actually an index into
  an array;
* Provide symbolic names for the possible values if DEFSHELL_INDEX;
* Document how the build environment may set DEFSHELL_INDEX or
  DEFSHELL_CUSTOM to choose the default shell;
* Move the fallback definition of DEFSHELL_INDEX from config.h to job.c,
  because it's used only in job.c.

Discussed with sjg.

Allow make(1) to be built with something other than "sh" as the
shell.  To use this, build with -D_PATH_DEFSHELLDIR=\"/path/to/dir\"
-D_BASENAME_DEFSHELL=\"shell\".

* Change the order of entries in shells[].  Now DEFSHELL defaults to 0,
  and shells[0] describes the default shell.  This will be "sh" in the
  usual case.

* If _BASENAME_DEFSHELL is defined, insert an additional entry above
  "sh" in the shells[] array, making this new entry shells[0].  The
  new entry is assumed to refer to an sh-compatible shell with a
  non-standard name.  (Tested using _PATH_DEFSHELLDIR="/usr/pkg/bin" and
  _BASENAME_DEFSHELL="bash".)

* In the shells[] entry for "sh", test defined(MAKE_NATIVE) &&
  defined(__NetBSD__) to decide whether we can use the "q" flag.

OK sjg, christos

Rip out the code for not 'USE_PGRP', I can't imagine it being useful!
My guess is that it is compat code for before the pgrp stuff was added.

Pull up revision 1.17 (requested by sjg in ticket #282):
Simplify build, no functional changes.
Instead of adding MAKE_BOOTSTRAP for hosted environments, i.e., when
you want things simple, instead add MAKE_NATIVE to get those hugely
important features like __RCSID().
It's now possible to build make on some hosts with: cc *.c */*.c

Simplify build, no functional changes.

Instead of adding MAKE_BOOTSTRAP for hosted environments, i.e., when
you want things simple, instead add MAKE_NATIVE to get those hugely
important features like __RCSID().

It's now possible to build make on some hosts with: cc *.c */*.c

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

Allow .SHELL: to control the shell used by compat mode too.
Add a shell spec for ksh - a nice portable posix shell.
Document .SHELL:

Bleh, make the conditional work *correctly* this time (...teaches me not to
try distilling down parenthesized booleans without caffeine).

Fix typo in previous.

Don't look at archive timestamps if MAKE_BOOTSTRAP is set.  (I'm not
entirely sure that this is useful *at all* these days, since it's been
turned off for ELF since ELF was brought in....)

better error messages on exec* failures. From Simon Burge.

Define USE_PGRP so that we send signals to our job's process group instead
of only pid.

PR/4140: David A. Holland: use svr4 style archives for ELF environments

Don't look at archive information on platforms that run ELF binaries

Update make(1) from trunk, by request from Christos Zoulas.  Fixes many bugs.

Import 4.4BSD-Lite2 sources onto CSRG branch (already merged at head)

- Merge in FreeBSD and Lite2 changes.
- Fix bug where a non-archive target with a .a suffix would always
  be considered to be out of date, since it does not have a TOC.

- Move -D flags from Makefile to config.h and explain what they do. Add
  -Wall -Wno-unused to CFLAGS. Add new define SYSVVARSUB to enable SysV
  style variable substitutions and enable them.
- Add SunOS style command substitutions via SUNSHCMD
- Fix core dump with '{variable = value'

Support SVR4 style archives.

- $NetBSD$ rcsids
- Fixed so that .[A-Z]* targets that do not match keywords are ignored as
  Posix mandates
- Added .PHONY target keyword

fixes/improvements from Christos Zoulas <christos@deshaw.com>.

Add RCS identifiers.

initial import of 386bsd-0.1 sources

Initial revision