Bug 468758 – dev-vcs/subversion-1.7.9 USE=-python PYTHON_TARGETS=python3_2 - src_configure(): "No Python implementation selected for the build."

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Bruno 2013-05-06 13:16:53 UTC]

Emerging subversion with USE=-python and PYTHON_TARGETS=python3_2 fails.

Installing/updating subversion should complete without requiring anything about python as was the case before introduction of PYTHON_TARGETS.



[ebuild     U  ] dev-vcs/subversion-1.7.9 [1.7.7] USE="dso webdav-neon -apache2 -berkdb -ctypes-python -debug -doc -extras -gnome-keyring -java -kde -nls -perl -python -ruby -sasl -vim-syntax -webdav-serf" PYTHON_TARGETS="-python2_5% -python2_6% -python2_7%" 0 kB


>>> Verifying ebuild manifests

>>> Emerging (1 of 1) dev-vcs/subversion-1.7.9
 * subversion-1.7.9.tar.bz2 SHA256 SHA512 WHIRLPOOL size ;-) ...                                                                                                                                                             [ ok ]
>>> Unpacking source...
>>> Unpacking subversion-1.7.9.tar.bz2 to /var/tmp/portage/dev-vcs/subversion-1.7.9/work
>>> Source unpacked in /var/tmp/portage/dev-vcs/subversion-1.7.9/work
>>> Preparing source in /var/tmp/portage/dev-vcs/subversion-1.7.9/work/subversion-1.7.9 ...
 * Applying subversion-1.5.4-interix.patch ...                                                                                                                                                                               [ ok ]
 * Applying subversion-1.5.6-aix-dso.patch ...                                                                                                                                                                               [ ok ]
 * Applying subversion-1.6.3-hpux-dso.patch ...                                                                                                                                                                              [ ok ]
 * Applying subversion-fix-parallel-build-support-for-perl-bindings.patch ...                                                                                                                                                [ ok ]
 * Running autoconf ...                                                                                                                                                                                                      [ ok ]
 * Running elibtoolize in: subversion-1.7.9/build/
 *   Applying portage/1.2.0 patch ...
 *   Applying sed/1.5.6 patch ...
 *   Applying as-needed/2.2.6 patch ...
cp: cannot stat ‘/var/tmp/portage/dev-vcs/subversion-1.7.9/work/subversion-1.7.9/build/configure’: No such file or directory
chmod: failed to get attributes of ‘/var/tmp/portage/dev-vcs/subversion-1.7.9/work/subversion-1.7.9/build/configure.gentoo.elt’: No such file or directory
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-vcs/subversion-1.7.9/work/subversion-1.7.9 ...
 * No Python implementation selected for the build. Please add one
 * of the following values to your PYTHON_TARGETS (in make.conf):
 * 
 * python2_5 python2_6 python2_7

 * ERROR: dev-vcs/subversion-1.7.9 failed (configure phase):
 *   No supported Python implementation in PYTHON_TARGETS.
 * 
 * Call stack:
 *     ebuild.sh, line   93:  Called src_configure
 *   environment, line 6939:  Called python_export_best
 *   environment, line 6438:  Called _python_obtain_impls
 *   environment, line  915:  Called _python_validate_useflags
 *   environment, line 1011:  Called die
 * The specific snippet of code:
 *       die "No supported Python implementation in PYTHON_TARGETS."
 * 
 * If you need support, post the output of `emerge --info '=dev-vcs/subversion-1.7.9'`,
 * the complete build log and the output of `emerge -pqv '=dev-vcs/subversion-1.7.9'`.
!!! When you file a bug report, please include the following information:
GENTOO_VM=  CLASSPATH="" JAVA_HOME=""
JAVACFLAGS="" COMPILER=""
and of course, the output of emerge --info =subversion-1.7.9
 * The complete build log is located at '/var/tmp/portage/dev-vcs/subversion-1.7.9/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-vcs/subversion-1.7.9/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-vcs/subversion-1.7.9/work/subversion-1.7.9'
 * S: '/var/tmp/portage/dev-vcs/subversion-1.7.9/work/subversion-1.7.9'

>>> Failed to emerge dev-vcs/subversion-1.7.9, Log file:


Reproducible: Always

[Comment 1 Bruno 2013-05-06 13:20:55 UTC]

Created attachment 347516 [details]
emerge --info

[Comment 2 Zoltán Halassy 2013-05-15 09:18:13 UTC]

"me too"

The change from 1.7.7 to 1.7.9 ebuild is that PYTHON_DEPS is now included in DEPEND. I don't really get it if subversion could live without python in 1.7.7, why does it need in 1.7.9.

[Comment 3 Zoltán Halassy 2013-05-15 09:59:30 UTC]

Just tested, it works correctly without python, the ebuild needs only a few modifications:

1) Remove the PYTHON_DEPS line from DEPEND (line 47). COMMON_DEPEND already has that with the python USE flag (which should control the dependency anyway).

2) The python_export_best line (line 187) and the ac_cv_python_includes line (line 192) needs a conditional (i'm not sure if the second one is needed, as ruby lacks the conditional too, and i don't have ruby isntalled), eg:

if use python; then
    python_export_best
fi
[...]
if use python; then
    ac_cv_python_includes='-I$(PYTHON_INCLUDEDIR)'
fi
ac_cv_path_RUBY="${EPREFIX}"/usr/bin/ruby18 ac_cv_path_RDOC="${EPREFIX}"/usr/bin/rdoc18 \
econf --libdir="${EPREFIX}/usr/$(get_libdir)" \
[...]

This should nail it.

[Comment 4 Andrey 2013-06-01 09:49:36 UTC]

Created attachment 349810 [details, diff]
proposed fix

I've prepared Zoltán Halassy's suggestions in comment 3 as a patch.

After applying the patch, subversion successfully builds on my machine with USE="-python" PYTHON_TARGETS="python3_2".

[Comment 5 Andrey 2013-06-01 10:18:26 UTC]

Just checked the patch from attachment 349810 [details, diff] with USE="python" PYTHON_TARGETS=python2_7 and it works fine too.

[Comment 6 Thomas Sachau 2013-07-20 08:45:07 UTC]

fixed:

  20 Jul 2013; Michał Górny <[e-mail]> subversion-1.7.9.ebuild:
  Lower the build-time requirement of Python to Python bindings or USE=test. Add
  REQUIRED_USE for Python.