Re: Compiling ncurses-6.1 on OpenBSD

[Thomas Dickey]

On Wed, Aug 14, 2019 at 04:10:17PM -0400, Thomas Dickey wrote:
> On Wed, Aug 14, 2019 at 12:22:44PM -0500, Robert Smith wrote:
> > Thank you for the hard work on this Thomas.  Have we heard anything back 
> > from
> > OpenBSD team on this?
> 
> nothing.  My cc' on the weekend was returned, and I attempted to subscribe
> using the link which the majordomo gave without success.
> 
> But visiting
> 
> https://lists.openbsd.org/cgi-bin/mj_wwwusr?user=&passw=&func=lists-long-full&extra=bugs
> 
> and subscribing there got it to accept it. (today).  Then I bounced my
> mail at the mailing list, to see if that would work, but went to find
> an archive - found here
> 
> http://openbsd-archive.7691.n7.nabble.com/openbsd-dev-bugs-f183916.html
> 
> ...which appears to have my earlier attempt actually succeeded.
> 
> (I didn't use sendbug, because my mail routing is a little complicated,
> and I only keep it working on the Debian machines).
>  
> > I see progress made on several different parts, but I'm not of any wholistic
> > solution to get this to link correctly.
> > 
> > I'm going to give the spec file a shot.
> 
> I think that if you added that to the $CFLAGS, it would work (sort of ugly,
> but a workaround)

I noticed that there's an OpenBSD 6.6 from October.
However, this linker defect exists in that version as well.

Since my message to address@hidden was ignored,
I'll have to assume that they're not interested in discussing it,
and will keep in mind to document it as a pitfall in upcoming releases.
  
> > -Robert
> > 
> > 
> > > On Aug 10, 2019, at 5:19 PM, Thomas Dickey <address@hidden> wrote:
> > > 
> > > On Mon, Jul 22, 2019 at 10:21:28AM +0900, Robert Smith wrote:
> > >> Dear Thomas, here is my build script for 5.9, when I change the source 
> > >> file to 6.1 all it does it duplicate this 5.6 file to a 6.1 file, and I 
> > >> have to manually add any tweaks if necessary.
> > >> 
> > >> root@h1up:/usr/src/build_system_v2/build_scripts# cat ncurses-5.9_ug
> > >> echo Compiling and Installing ncurses-5.9
> > > 
> > > I revisited this, and can see half of the problem, which offers a 
> > > different
> > > workaround.  Comparing the specs files for the compiler in 6.2 and 6.5,
> > > I see that someone added a fallback for -L/usr/lib, apparently to 
> > > compensate
> > > for some other change.
> > > 
> > > I'm looking at this file:
> > >   /usr/lib/gcc-lib/amd64-unknown-openbsd6.5/4.2.1/specs
> > > 
> > > which has a line with this information:
> > >   %{!static:--eh-frame-hdr} %{!shared:%{!nostdlib:%{!r*:%{!e*:-e 
> > > __start}}}}    %{shared:-shared} %{R*}    %{static:-Bstatic}    
> > > %{!static:-Bdynamic}    %{rdynamic:-export-dynamic}    %{assert*}    
> > > %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so}    
> > > %{!nostdlib:-L/usr/lib}
> > > 
> > > That
> > >   %{!nostdlib:-L/usr/lib}
> > > 
> > > is the added text.  Using ktrace, I could see that the arguments passed
> > > to collect2 (part of the compiler) put a "-L/usr/lib" before any of the
> > > command-line arguments:
> > > 
> > >   [0] = "/usr/lib/gcc-lib/amd64-unknown-openbsd6.5/4.2.1/collect2"
> > >   [1] = "--eh-frame-hdr"
> > >   [2] = "-e"
> > >   [3] = "__start"
> > >   [4] = "-Bdynamic"
> > >   [5] = "-dynamic-linker"
> > >   [6] = "/usr/libexec/ld.so"
> > >   [7] = "-L/usr/lib"
> > >   [8] = "-o"
> > >   [9] = "clear"
> > >   [10] = "/usr/lib/crt0.o"
> > >   [11] = "/usr/lib/crtbegin.o"
> > >   [12] = "-L../lib"
> > >   [13] = "-L/usr/lib/gcc-lib/amd64-unknown-openbsd6.5/4.2.1"
> > >   [14] = "../obj_s/clear.o"
> > >   [15] = "../obj_s/clear_cmd.o"
> > >   [16] = "../obj_s/tty_settings.o"
> > >   [17] = "-lncurses"
> > >   [18] = "-lgcc"
> > >   [19] = "-lc"
> > >   [20] = "-lgcc"
> > >   [21] = "/usr/lib/crtend.o"
> > > 
> > > So the loader gets libncurses.so immediately without bothering to pay
> > > any attention to its parameters.
> > > 
> > > Just reverting that change doesn't work (won't link), so I can see it's
> > > just half the story.  But it's enough to see that it probably wasn't
> > > intended behavior.
> > > 
> > > You might want to open a bug report with the OpenBSD developers here:
> > > 
> > >   http://www.openbsd.org/report.html
> > > 
> > > (cc'ing them, anyway).
> > > 
> > > According to
> > > 
> > >   https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html
> > > 
> > > you could make a custom "specs" file with a -L../lib before the 
> > > -L/usr/lib,
> > > using the "-specs=" flag and pass that in your $CFLAGS 
> > > 
> > > (In a quick check, that works for me).
> > > 
> > > -- 
> > > Thomas E. Dickey <address@hidden>
> > > https://invisible-island.net
> > > ftp://ftp.invisible-island.net
> > 
> 
> -- 
> Thomas E. Dickey <address@hidden>
> https://invisible-island.net
> ftp://ftp.invisible-island.net



-- 
Thomas E. Dickey <address@hidden>
https://invisible-island.net
ftp://ftp.invisible-island.net

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