Date: Mon, 11 Mar 2002 13:11:38 +0200 From: Ruslan Ermilov <ru@FreeBSD.ORG> To: BOUWSMA Beery <freebsd-user@netscum.dyndns.dk> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: buildworld with ro /usr/src broken Message-ID: <20020311111138.GA4678@sunbay.com> In-Reply-To: <200203102012.g2AKCbZ00762@beerswilling.netscum.dyndns.dk> References: <20020209130437.GA15287@myhakas.estpak.ee> <200202091743.g19HhIm00362@beerswilling.netscum.dyndns.dk> <20020227111914.GB30220@sunbay.com> <20020227155244.A24137@newtrinity.default-network.net> <20020227204012.GA99496@sunbay.com> <200203102012.g2AKCbZ00762@beerswilling.netscum.dyndns.dk>
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On Sun, Mar 10, 2002 at 09:12:37PM +0100, BOUWSMA Beery wrote:
> [replies sent directly to me may timeout and bounce, since I'm not
> online as often as I should be, but I'll check the list archives]
>
>
> > > > MAKEOBJDIR[PREFIX] only work right if set as environment variables.
>
> > > > I have an uncommitted patch that makes it possible to set them on
> > > > make(1)'s command line but still no joy in attempting to set them
> > > > in /etc/make.conf. I bear in mind adding a patch to Makefile.inc1
> > > > too that would prevent people from attempting to set MAKEOBJDIRPREFIX
> > > > in /etc/make.conf.
>
> Bah. You're no fun.
>
> Hmmm, so why then am I now buildworld'ing -current (and have been for
> the past almost five hours) with a read-only /usr/src
> # touch /usr/src/foo
> touch: /usr/src/foo: Read-only file system
> using only the commandline `time nice make buildworld' with the
> object tree being put in
> bash-2.05a$ ls -lart /usr/obj/5.0-CURRENT/usr/src/
> total 42
> drwxr-xr-x 3 root wheel 512 Jan 11 06:58 ..
> drwxr-xr-x 4 root wheel 512 Jan 25 15:33 gnu
> drwxr-xr-x 6 root wheel 512 Jan 25 15:34 secure
> drwxr-xr-x 5 root wheel 512 Jan 25 18:38 sys
> drwxr-xr-x 3 root wheel 512 Mar 6 13:28 i386
> drwxr-xr-x 55 root wheel 1024 Mar 6 14:06 lib
> drwxr-xr-x 35 root wheel 512 Mar 6 14:06 bin
> drwxr-xr-x 41 root wheel 1024 Mar 6 14:07 games
> drwxr-xr-x 32 root wheel 1024 Mar 6 14:09 libexec
> drwxr-xr-x 86 root wheel 2048 Mar 6 14:10 sbin
> drwxr-xr-x 16 root wheel 512 Mar 6 14:11 share
> drwxr-xr-x 207 root wheel 6656 Mar 6 14:14 usr.bin
> drwxr-xr-x 158 root wheel 5632 Mar 6 14:16 usr.sbin
> drwxr-xr-x 3 root wheel 512 Mar 6 14:16 etc
> drwxr-xr-x 16 root wheel 512 Mar 6 14:16 .
> drwxr-xr-x 4 root wheel 512 Mar 6 15:34 include
>
> And I've been building both -stable and -current this way
> in subdirectories of /usr/obj for months, with read-only src,
> since figuring how to force it to work?
>
>
> > > I don't want to doubt your expertise but
> > > `cd /usr/src && make MAKEOBJDIRPREFIX=/tmp/obj buildworld`
> > > works for ages for me, same for installworld.
>
> (This is no doubt because /usr/src is read-write for this
> particular user and receives the changes that break buildworld
> in the read-only case)
>
>
>
> > Run the following commands in sequence to see what I'm talking about:
>
> > rm -rf /tmp/obj
> > cd /usr/src/bin/cat
> > make MAKEOBJDIRPREFIX=/tmp/obj obj
> > make MAKEOBJDIRPREFIX=/tmp/obj all
>
> Okay, here's what I see, /usr/src read-only.
>
> bash-2.05a$ make MAKEOBJDIRPREFIX=/tmp/obj obj
> /tmp/obj/usr/src/bin/cat created for /usr/src/bin/cat
> bash-2.05a$ make MAKEOBJDIRPREFIX=/tmp/obj all
> cc -O -pipe -Wall -Wformat -Werror -Wall -Wno-uninitialized -Wnon-const-forma
> t -Wno-format-extra-args -Werror -c cat.c
> Assembler messages:
> FATAL: can't create cat.o: Permission denied
>
>
> > ls -l /tmp/usr/usr/src/bin/cat
> (s,usr,obj, of course)
> As expected, with my read-only source (and working as a normal luser
> too), the attempt fails.
>
>
> > Try setting MAKEOBJDIRPREFIX in environment then.
>
> Here's what I have that's of interest in my /etc/make.conf, for
> both -current and -stable (NetBSD allows me to define BSDOBJDIR to
> get somewhat similar results)...
>
> RELNAME!= /usr/bin/uname -r
> MAKEOBJDIRPREFIX?= /usr/obj/${RELNAME}
>
> You're right, though, that not all targets will work with this.
> Here's what I get with the `all' target:
>
> [17:13:36]root@dastardly.newsbastards.org:/usr/src/bin/cat{506}# rmdir !$
> rmdir /usr/obj/5.0-CURRENT/usr/src/bin/cat/
> [17:13:55]root@dastardly.newsbastards.org:/usr/src/bin/cat{507}# make obj
> /usr/obj/5.0-CURRENT/usr/src/bin/cat created for /usr/src/bin/cat
>
> [17:27:08]root@dastardly.newsbastards.org:/usr/src/bin/cat{545}# make all
> cc -O -pipe -Wall -Wformat -Werror -Wall -Wno-uninitialized -Wnon-const-forma
> t -Wno-format-extra-args -Werror -c cat.c
> Assembler messages:
> FATAL: can't create cat.o: Read-only file system
> cat.c:312: output pipe has been closed
> *** Error code 1
>
> Stop in /usr/src/bin/cat.
>
>
> I played around a bit with the -f and -m `make' options to see if I
> could get this working based on my /etc/make.conf contents, but no
> real joy was to be found. In a case like this, or, say, when I had
> to rebuild one of the kernel modules with a patch, I needed to use
> the `env ...' form of the command.
>
>
> However, as part of a `buildworld' or `buildkernel' or `installworld'
> run, I do get things put in the proper place, rather than building
> them in /usr/src proper; later once the build has gotten around to
> this directory:
>
> [01:37:51]root@dastardly.newsbastards.org:/usr/src/bin/cat{557}# ls -lart /usr/
> obj/5.0-CURRENT/usr/src/bin/cat/
> total 98
> drwxr-xr-x 35 root wheel 512 Mar 6 17:13 ..
> -rw-r--r-- 1 root wheel 1990 Mar 6 21:05 .depend
> -rw-r--r-- 1 root wheel 5452 Mar 6 22:29 cat.o
> -rwxr-xr-x 1 root wheel 82283 Mar 6 22:29 cat
> drwxr-xr-x 2 root wheel 512 Mar 6 22:29 .
> -rw-r--r-- 1 root wheel 2428 Mar 6 22:29 cat.1.gz
>
> So I'll agree that the /etc/make.conf solution isn't perfect and
> breaks with some things less than a full world, but so far it's
> performed adequately, the read-only status of /usr/src being a
> safety net that I'll probably be losing now that I've gotten a
> union mount atop it to work with `make', containing my local hacks.
>
You don't see this behavior with `buildworld' etc. targets because
Makefile.inc1 sets it for you in environment, and executes another
copy of make(1) with this environment to actually build the target.
[...]
Cheers,
--
Ruslan Ermilov Sysadmin and DBA,
ru@sunbay.com Sunbay Software AG,
ru@FreeBSD.org FreeBSD committer,
+380.652.512.251 Simferopol, Ukraine
http://www.FreeBSD.org The Power To Serve
http://www.oracle.com Enabling The Information Age
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