Re: [Ltib] Python Build failure for LPC3250

[Henri Kjellberg]

On Mon, Jun 25, 2012 at 11:02 AM, Mike Goins <address@hidden> wrote:

Sorry, for the top post, but wanted to explain the previous errors first.

Since python has to make a small native build to cross compile,
depending on where the failure is, running the build again may have
incompatible libs laying around (that would be the error messages from
earlier in the thread).  It is safest, if not actively developing
python, to remove the build directory before running again, or just
collect the initial error, not the subsequent build.

More below on the build error.

On Mon, Jun 25, 2012 at 11:09 AM, Henri Kjellberg
<address@hidden> wrote:
> Sorry, this will be quite a long copy and paste. Here are the results:
>
> Processing: python
> ====================
> Build path taken because: no prebuilt rpm,�
>
> rpmbuild --dbpath /home/henri/ltib/rootfs//var/lib/rpm --target arm --define
> '_unpackaged_files_terminate_build 0' --define '_target_cpu arm' --define
> '__strip strip' --define '_topdir /home/henri/ltib/rpm' --define '_prefix
> /usr' --define '_tmppath /home/henri/ltib/tmp' --define '_rpmdir
> /home/henri/ltib/rpm/RPMS' �--define '_mandir /usr/share/man' --define
> '_sysconfdir /etc' --define '_localstatedir /var' -bb --clean --rmsource
> �/home/henri/ltib/dist/lfs-5.1/python/python.spec
> Building target platforms: arm
> Building for target arm
> Executing(%prep): /bin/sh -e /home/henri/ltib/tmp/rpm-tmp.21362
> + umask 022
> + cd /home/henri/ltib/rpm/BUILD
> + cd /home/henri/ltib/rpm/BUILD
> + rm -rf Python-2.4.4
> + tar -xvvf -

<snipped, host builds OK>

> HOSTPYTHON=./hostpython CROSS_COMPILE=yes install
> mkdir ./Lib/plat-linux3
> cp ./Lib/plat-generic/regen ./Lib/plat-linux3/regen
> export PATH; PATH="`pwd`:$PATH"; \
> export PYTHONPATH; PYTHONPATH="`pwd`/Lib"; \
> export DYLD_FRAMEWORK_PATH; DYLD_FRAMEWORK_PATH="`pwd`"; \
> export EXE; EXE=""; \
> cd ./Lib/plat-linux3; ./regen

This is where the error occurs. Since it appears that you are using a
3.0 kernel based system, the plat-generic is used instead of
plat-linux2.  Ltib's version of Python, 2.4.4 does not deal with
linux-3.0.

<snip>

> ./regen: line 3: /home/henri/ltib/rpm/BUILD/Python-2.4.4/python: cannot
> execute binary file
> make: *** [Lib/plat-linux3] Error 126

> make: *** Waiting for unfinished jobs....

Here is calling regen incorrectly.

There are a few fixes for this, by increasing difficulty and only need
to do one of them:

1.  Switch to a distro that is not using linux-3.0, specifically linux-2.6xx

2.  Patch the ltib version of Python-2.4.4 to work with linux-3.0 ( I
would do this myself, but do not have a 3.0 system)
    a. remove the python build dir.
    b. ./ltib -p python -m prep
    c.  in the python build dir copy Lib/plat-linux2 to
Lib/plat-linux3  (this duplicates the 2.0 handling for 3)
    d.  ./ltib -p python -m scbuild
    e.  if all OK, do the scinstall/scdeploy steps

3. Rev the ltib python version to one that is compatible with
linux-3.0.  Not recommend, unless you also enjoy chewing glass.

If you do happen to do #2 and it works, let us know.   It might be
worth a patch for ltib to ensure future compatibility.

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Neat I will try and accomplish Option 2 and let you know the results. Thanks for diagnosing the problem!

Henri