/etc/portage/package.use: dev-libs/newt -python PYTHON_TARGETS: -* Then emerge: >>> Configuring source in /var/tmp/portage/dev-libs/newt-0.52.25-r1/work/newt-r0-52-25 ... * No Python implementation selected for the build. Please add one * of the following values to your PYTHON_TARGETS (in make.conf): * * python3_11 python3_12 python3_13 * ERROR: dev-libs/newt-0.52.25-r1::gentoo failed (configure phase): * No supported Python implementation in PYTHON_TARGETS. * * Call stack: * ebuild.sh, line 136: Called src_configure * environment, line 2126: Called python_foreach_impl 'getversions' * environment, line 1819: Called _python_obtain_impls * environment, line 626: Called _python_validate_useflags * environment, line 773: Called die * The specific snippet of code: * die "No supported Python implementation in PYTHON_TARGETS." The failure occurs because the ebuild's src_configure() calls python_foreach_impl *unconditionally* despite that REQUIRED_USE only *conditionally* requires ${PYTHON_REQUIRED_USE}. It actually looks like the changes that were made in -r1 inadvertently abandoned the ${versions} variable that is built up by the python_foreach_impl loop. And now, worse, even with Python enabled, Newt gets configured without any(!) Python versions because EPYTHON is unset at the point of the call to econf. I think this was the intention: src_configure() { local -a versions if use python; then getversions() { versions+=("${EPYTHON}") } python_foreach_impl getversions fi econf \ "$(use_with python '' "${versions[*]}")" \ $(use_with gpm gpm-support) \ $(use_with tcl) \ $(use_enable nls) } Note: The double-quotes around the "$(use_with python …)" command substitution are important because the argument will have embedded spaces when multiple Python versions are enabled, but it all needs to be passed to econf as a single argument.
(In reply to Matt Whitlock from comment #0) > /etc/portage/package.use: > > dev-libs/newt -python PYTHON_TARGETS: -* > > Then emerge: > > >>> Configuring source in /var/tmp/portage/dev-libs/newt-0.52.25-r1/work/newt-r0-52-25 ... > * No Python implementation selected for the build. Please add one > * of the following values to your PYTHON_TARGETS (in make.conf): > * > * python3_11 python3_12 python3_13 > > * ERROR: dev-libs/newt-0.52.25-r1::gentoo failed (configure phase): > * No supported Python implementation in PYTHON_TARGETS. > * > * Call stack: > * ebuild.sh, line 136: Called src_configure > * environment, line 2126: Called python_foreach_impl 'getversions' > * environment, line 1819: Called _python_obtain_impls > * environment, line 626: Called _python_validate_useflags > * environment, line 773: Called die > * The specific snippet of code: > * die "No supported Python implementation in PYTHON_TARGETS." > > The failure occurs because the ebuild's src_configure() calls > python_foreach_impl *unconditionally* despite that REQUIRED_USE only > *conditionally* requires ${PYTHON_REQUIRED_USE}. Yes, that's a forgotten call to `use python &&`. Note, strictly speaking it doesn't matter if the function is defined anyway. > It actually looks like the changes that were made in -r1 inadvertently > abandoned the ${versions} variable that is built up by the > python_foreach_impl loop. And now, worse, even with Python enabled, Newt > gets configured without any(!) Python versions because EPYTHON is unset at > the point of the call to econf. That feels like a rebase error and I feeling very confused now. :( > Note: The double-quotes around the "$(use_with python …)" command > substitution are important because the argument will have embedded spaces > when multiple Python versions are enabled, but it all needs to be passed to > econf as a single argument. It remains unbelievably frustrating that elements with spaces in them are not correctly reported by econf / edo / things of that similar nature.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=314c1a45c6d0249caed3c81ea1b7501c74e84298 commit 314c1a45c6d0249caed3c81ea1b7501c74e84298 Author: Eli Schwartz <eschwartz@gentoo.org> AuthorDate: 2025-05-11 04:35:16 +0000 Commit: Eli Schwartz <eschwartz@gentoo.org> CommitDate: 2025-05-11 06:40:33 +0000 dev-libs/newt: fix python optionality - we can't call python_foreach_impl if all targets are unset, which is permitted if python is optional - somehow I switched back to calling with EPYTHON instead of versions, this was plainly wrong - $(use_with) *must* be additionally quoted if withval itself is quoted and contains spaces, or we lose the spaces again Closes: https://bugs.gentoo.org/955709 Signed-off-by: Eli Schwartz <eschwartz@gentoo.org> dev-libs/newt/newt-0.52.25-r1.ebuild | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
