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Re: Bug#833829: libgcc-6-dev: Missing crtfastmath.o

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Re: Bug#833829: libgcc-6-dev: Missing crtfastmath.o

Matthias Klose
Control: severity -1 important
Control: tags -1 + help

On 09.08.2016 09:12, Christian Marillat wrote:

> Package: libgcc-6-dev
> Version: 6.1.1-11
> Severity: grave
>
> I'm unable to build a package because crtfastmath.o is missing from this
> package. Architecture is kfreebsd-i386. I don't see this bug on the
> kfreebsd-amd64
>
> ,----
> | cc -Wall -DPIC   -O2 -pipe -fno-tree-dominator-opts -fno-tree-pre -ffast-math -DUSE_MMX -DUSE_SSE -DUSE_SSE2 -g -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC -pthread    luma.c   -o luma
> | /usr/bin/ld: cannot find crtfastmath.o: No such file or directory
> `----

https://buildd.debian.org/status/fetch.php?pkg=gcc-6&arch=kfreebsd-i386&ver=6.1.1-11&stamp=1470331624

looks like this is never built, and the install step succeeds despite it
complains about not finding this file.

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Re: Bug#833829: libgcc-6-dev: Missing crtfastmath.o on kfreebsd-*

Andreas Beckmann-4
Control: retitle -1 libgcc-6-dev: Missing crtfastmath.o on kfreebsd-*
Control: affects -1 + src:vlc

On Tue, 9 Aug 2016 11:39:54 +0200 Matthias Klose <[hidden email]> wrote:

> > I'm unable to build a package because crtfastmath.o is missing from this
> > package. Architecture is kfreebsd-i386. I don't see this bug on the
> > kfreebsd-amd64
> >
> > ,----
> > | cc -Wall -DPIC   -O2 -pipe -fno-tree-dominator-opts -fno-tree-pre -ffast-math -DUSE_MMX -DUSE_SSE -DUSE_SSE2 -g -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC -pthread    luma.c   -o luma
> > | /usr/bin/ld: cannot find crtfastmath.o: No such file or directory
> > `----
>
> https://buildd.debian.org/status/fetch.php?pkg=gcc-6&arch=kfreebsd-i386&ver=6.1.1-11&stamp=1470331624
>
> looks like this is never built, and the install step succeeds despite it
> complains about not finding this file.

Seems to be specific to gcc-6, the file is available in libgcc-4.9-dev,
libgcc-5-dev, and gcc-snapshot (7.0.0).

This bug is the cause for the FTBFS of vlc on both kfreebsd-amd64 and
kfreebsd-i386:

https://buildd.debian.org/status/fetch.php?pkg=vlc&arch=kfreebsd-amd64&ver=2.2.4-3%2Bb4&stamp=1472902929
https://buildd.debian.org/status/fetch.php?pkg=vlc&arch=kfreebsd-i386&ver=2.2.4-3%2Bb4&stamp=1472905628

Andreas

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Re: Bug#833829: libgcc-6-dev: Missing crtfastmath.o on kfreebsd-*

Christian Marillat
On 06 sept. 2016 15:17, Andreas Beckmann <[hidden email]> wrote:

>
[...]

> This bug is the cause for the FTBFS of vlc on both kfreebsd-amd64 and
> kfreebsd-i386:

Not only vlc, but also mplayer, mlt, xine-lib-1.2, forked-daapd, mpd,
gegl and probably others.

In my opinion the dead of the kfreebsd-* ports if this bug ins't fixed.

Christian

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Re: Bug#833829: libgcc-6-dev: Missing crtfastmath.o on kfreebsd-*

James Clarke-2
In reply to this post by Andreas Beckmann-4
On Tue, Sep 06, 2016 at 03:17:52PM +0200, Andreas Beckmann wrote:

> Control: retitle -1 libgcc-6-dev: Missing crtfastmath.o on kfreebsd-*
> Control: affects -1 + src:vlc
>
> On Tue, 9 Aug 2016 11:39:54 +0200 Matthias Klose <[hidden email]> wrote:
> > > I'm unable to build a package because crtfastmath.o is missing from this
> > > package. Architecture is kfreebsd-i386. I don't see this bug on the
> > > kfreebsd-amd64
> > >
> > > ,----
> > > | cc -Wall -DPIC   -O2 -pipe -fno-tree-dominator-opts -fno-tree-pre -ffast-math -DUSE_MMX -DUSE_SSE -DUSE_SSE2 -g -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC -pthread    luma.c   -o luma
> > > | /usr/bin/ld: cannot find crtfastmath.o: No such file or directory
> > > `----
> >
> > https://buildd.debian.org/status/fetch.php?pkg=gcc-6&arch=kfreebsd-i386&ver=6.1.1-11&stamp=1470331624
> >
> > looks like this is never built, and the install step succeeds despite it
> > complains about not finding this file.
>
> Seems to be specific to gcc-6, the file is available in libgcc-4.9-dev,
> libgcc-5-dev, and gcc-snapshot (7.0.0).
>
> This bug is the cause for the FTBFS of vlc on both kfreebsd-amd64 and
> kfreebsd-i386:
>
> https://buildd.debian.org/status/fetch.php?pkg=vlc&arch=kfreebsd-amd64&ver=2.2.4-3%2Bb4&stamp=1472902929
> https://buildd.debian.org/status/fetch.php?pkg=vlc&arch=kfreebsd-i386&ver=2.2.4-3%2Bb4&stamp=1472905628

This seems to be caused by the fact that t-crtfm moved from
libgcc/config/i386 to just libgcc/config between GCC 5 and 6, but
kfreebsd-unwind.diff wasn't updated to reflect this (GCC 7's was though,
but there's another issue below). Patch included, though I haven't
actually tested it.

Matthias, I noticed a couple of other things when exploring this:

 1. GCC 5 and 6 both omit the tm_file="${tm_file} i386/elf-lib.h"
    statement in the new kfreebsd branch for both x86_64 and i386, but
    GCC 7 includes it.

 2. (Likely more important) GCC 7's kfreebsd-unwind.diff is missing the
    change for x86_64[1], so I assume only i386 has unwind support.

Let me know if you want separate bugs for either of these.

Regards,
James

[1] https://sources.debian.net/src/gcc-7/7.1.0-5/debian/patches/kfreebsd-unwind.diff/

---
diff -u gcc-6-6.3.0/debian/patches/kfreebsd-unwind.diff gcc-6-6.3.0/debian/patches/kfreebsd-unwind.diff
--- gcc-6-6.3.0/debian/patches/kfreebsd-unwind.diff
+++ gcc-6-6.3.0/debian/patches/kfreebsd-unwind.diff
@@ -11,7 +11,7 @@
 -i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | i[34567]86-*-gnu* | i[34567]86-*-kopensolaris*-gnu)
 +i[34567]86-*-kfreebsd*-gnu)
 + extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o crtfastmath.o"
-+ tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff t-dfprules"
++ tmake_file="${tmake_file} i386/t-crtpc t-crtfm i386/t-crtstuff t-dfprules"
 + md_unwind_header=i386/freebsd-unwind.h
 + ;;
 +i[34567]86-*-knetbsd*-gnu | i[34567]86-*-gnu* | i[34567]86-*-kopensolaris*-gnu)
@@ -25,7 +25,7 @@
 -x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu)
 +x86_64-*-kfreebsd*-gnu)
 + extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o crtfastmath.o"
-+ tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff t-dfprules"
++ tmake_file="${tmake_file} i386/t-crtpc t-crtfm i386/t-crtstuff t-dfprules"
 + md_unwind_header=i386/freebsd-unwind.h
 + ;;
 +x86_64-*-knetbsd*-gnu)

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