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* Add new jobserver feature.

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* Small updates to the manual
* E.Zaretskii fix for new DJGPP version.
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Paul Smith
1999-04-25 04:30:55 +00:00
parent 7f3ffd4019
commit fc0fe4103a
14 changed files with 574 additions and 149 deletions
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1999-04-25 Paul D. Smith <psmith@gnu.org>
* make.texinfo: Updates to @dircategory and @direntry suggested by
Karl Berry <karl@cs.umb.edu>.
1999-04-18 Eli Zaretskii <eliz@is.elta.co.il>
* configh.dos.template: Update to recognize that version 2.02 of
DJGPP contains sys_siglist stuff.
1999-04-14 Paul D. Smith <psmith@gnu.org>
* make.texinfo (Options/Recursion): Document the job server.
(Parallel): Tweaks.
1999-04-13 Paul D. Smith <psmith@gnu.org>
Implement a new "job server" feature; the implementation was
suggested by Howard Chu <hyc@highlandsun.com>.
* configure.in (job-server): New disable option for job server
support--it's enabled by default.
* NEWS: Summarize the new feature.
* acconfig.h: New definition MAKE_JOBSERVER if job server support
is enabled.
* config.h-vms.template: Undef MAKE_JOBSERVER for this port.
* config.h.W32.template: Ditto.
* config.ami.template: Ditto.
* main.c (struct command_switch): Add a new type: int_string.
(switches[]) Use int_string for -j if MAKE_JOBSERVER.
(init_switches): Initialize the new int_string switch type.
(print_usage): New function, extracted from decode_switches().
(decode_switches): Call it. Decode the new int_string switch type.
(define_makeflags): Add new int_string switch data to MAKEFLAGS.
(job_fds[]) Array to contain the pipe file descriptors.
(main): Parse the job_slots_str option results. If necessary,
create the pipe and seed it with tokens. Set the non-blocking bit
for the read fd. Enable the signal handler for SIGCHLD even if we
have a non-hanging wait; it's needed to interrupt the select() in
job.c:start_waiting_job().
* make.h: Declare job_fds[].
* job.h (struct child): Add job_token field to store the token for
this job (if any).
* job.c (reap_children): When a child is fully reaped, release the
token back into the pipe.
(free_child): If the child to be freed still has a token, put it
back.
(new_job): Initialize the job_token member.
(start_waiting_job): For local jobs, if we're using the pipe, get
a token before we check the load, etc. We do this by performing a
non-blocking read in a loop. If the read fails, no token is
available. Do a select on the fd to wait for a token. We need to
re-enable the signal handler for SIGCHLD even if we have a
non-hanging waitpid() or wait3(), so that the signal will
interrupt the select() and we can wake up to reap children.
(child_handler): Re-enable the signal handler. The count is still
kept although it's not needed or used unless you don't have
waitpid() or wait3().
1999-04-03 Paul D. Smith <psmith@gnu.org>
* remake.c (f_mtime): If: a) we found a file and b) we didn't