Re: emchain: Automated toolchain builder

[Jim Heck <Jim.Heck@Sun.COM>]

Hector,

I managed to fix the $(binary_stamp)-libstdcxx: target in the 
debian/rules.d/binary-libstdcxx-cross.mk file so that the duplicated 
'powerpc-cross-powerpc-cross' dependency no longer occurs.  It's a 
rather brute force fix (I duplicated some sed code used elsewhere in the 
file to strip out the 'powerpc-cross' in case it already exists before 
it gets put back by the later sed script).  I'll send you my patch after 
some further testing.  I'm not sure why the cross version of 
dh_shlibdeps is incorrectly generating the dependency in the .substvars 
file.  I didn't find any evidence that the target was geting generated 
twice in the build log (which could cause the sed script to run twice), 
so I'm assuming that somehow dh_shlibdeps is either adding it twice, or 
working from files that already have the 'powerpc-cross' embedded in 
their names.

I also think I know why the libgcc1 library is not being generated (will 
verify in my next build, which I'm about to kick off).  I think it's 
because in debian/rules.defs, the 'with_libgcc' target is defined to be

with_libgcc := yes
... (and later)
with_libgcc := built from gcc-4.0 sources

This I think will prevent the library from being added as a dependency 
of the build later on.  If I am right, do you know if there is a 
specific reason why this library was excluded from the build with 
gcc-3.4?  You mentioned something about using the one from gcc-4.0.  Was 
that because there is a specific problem with the one from gcc-3.4?

I just wanted you to know I have a workaround so you don't waste any 
time on it.

Thanks,

-Jim

Jim Heck - Sun Microsystems wrote:
> Hector,
>
> Thanks for all your help so far.
>
> I found one other thing that may be of interest to you concerning the 
> gcc-3.4 libstdc++6-powerpc-cross package.  There is a typo in the 
> generated dependencies of the package (see below, powerpc-cross is 
> duplicated).  I tried to analyze and my best guess is that there is a 
> problem with the sed scripts that modify this in the 
> debian/rules.d/binary-libstdcxx-cross.mk file (or at least I think 
> that is where the problem arises, I couldn't quite make sense of how 
> that all works).
>
> As I said in my last message, this dependency called out should be for 
> libgcc1-powerpc-cross, which as I mentioned doesn't get built for some 
> reason.  I tried satisfying the dependency as you suggested using a 
> library from gcc-4.1, but the typo prevented the dependency from being 
> met.
>
> Let me know if I should file this as a bug against gcc-3.4 or not.
>
> Thanks,
>
> -Jim
>
> Here is a dump using dpkg -I of the built library.
>
> jheck@heckmobile:/usr/src/cross-toolchain-3.4$ dpkg -I 
> libstdc++6-powerpc-cross_3.4.6-4_all.deb
> new debian package, version 2.0.
> size 334952 bytes: control archive= 817 bytes.
>     804 bytes,    22 lines      control
>     342 bytes,     4 lines      md5sums
>      34 bytes,     1 lines      shlibs
> Package: libstdc++6-powerpc-cross
> Version: 3.4.6-4
> Section: devel
> Priority: extra
> Architecture: all
> Depends: gcc-3.4-base (= 3.4.6-4), libc6-powerpc-cross (>= 2.3.5-1), 
> libgcc1-powerpc-cross-powerpc-cross (>= 3.4.4)
> Conflicts: libstdc++6-0
> Replaces: libstdc++6-0
> Provides: libstdc++6-powerpc-dcv1
> Installed-Size: 1036
> Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
> Source: gcc-3.4
> Description: The GNU Standard C++ Library v3
>  This package contains an additional runtime library for C++ programs
>  built with the GNU compiler.
>  .
>  libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which
>  was included up to g++-2.95. The first version of libstdc++-v3 appeared
>  in g++-3.0.
>  .
>  This package contains files for powerpc architecture, for use in 
> cross-compile  environment.