Our python ebuilds are still adding, # Set LDFLAGS so we link modules with -lpython3.2 correctly. # Needed on FreeBSD unless Python 3.2 is already installed. # Please query BSD team before removing this! append-ldflags "-L." to its LDFLAGS. I don't think this is a problem for Gentoo per se, but the fact that python's *FLAGS are adding things into the include paths has been problematic elsewhere; for example homebrew: https://github.com/Homebrew/homebrew-core/issues/68352 To avoid obscure breakages, SageMath (which makes heavy use of cython) has begun rejecting the system python if it adds any -I or -L flags into CFLAGS or LFLAGS. I can work around this, but, if the only reason to keep it around is for an ancient version of python on a Gentoo/FreeBSD that no longer exists, then maybe it's easier to just delete it.
Ok, doing a test run on all the Pythons.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=2ede26713b5d391957cc587b166d3aa1e6d5fb25 commit 2ede26713b5d391957cc587b166d3aa1e6d5fb25 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: 2021-02-11 14:35:50 +0000 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: 2021-02-11 14:37:20 +0000 dev-lang/python: Remove obsolete -L. hack Closes: https://bugs.gentoo.org/770076 Signed-off-by: Michał Górny <mgorny@gentoo.org> dev-lang/python/python-2.7.18-r6.ebuild | 5 ----- dev-lang/python/python-3.10.0_alpha5.ebuild | 5 ----- dev-lang/python/python-3.6.12-r2.ebuild | 5 ----- dev-lang/python/python-3.7.9-r2.ebuild | 5 ----- dev-lang/python/python-3.8.7-r1.ebuild | 5 ----- dev-lang/python/python-3.9.1-r1.ebuild | 5 ----- 6 files changed, 30 deletions(-)
Cool, thanks!
Hrmm, I didn't revbump because this is an obscure problem but maybe I should've if you actually need it to build SageMath. Could you confirm that everything works for you with the updated ebuilds before I do the revbump?
It works now: Checking whether SageMath should install SPKG python3... ... configure: will use system package and not install SPKG python3 This is only a problem in the latest beta version of SageMath (which isn't in the tree), so a revbump is not critical.
Original problem possibly consisted of 2 subproblems: 1. Missing patterns in hardcoded list in configure.ac (previously configure.in), which specifies platforms on which -L. is used by non-distutils part of build system: BLDLIBRARY='-L. -lpython$(LDVERSION)' Addition of NetBSD* (2003-05-31, CPython >=2.3): https://github.com/python/cpython/commit/96ce8057257b00b07c56999480343a603a9740aa Addition of FreeBSD* (2004-10-26, CPython >=2.4): https://github.com/python/cpython/commit/337614993e6f329143e5a68349b62f0a43114ac9 Addition of DragonFly* (2006-02-17, CPython >=2.5): https://github.com/python/cpython/commit/86d662602d18dccbae4ee7bf23564263dee7141e Addition of OpenBSD* (2011-07-24, CPython =2.* && >=2.7.5, CPython >=3.2.2): https://github.com/python/cpython/commit/749400a94d78bb714a8964c21f8979ab6b070708 Addition of VxWorks* (2020-12-14, CPython >=3.10.0a4): https://github.com/python/cpython/commit/c117426bf8e7dd7a25e7d15bfbc88253b6ed42de 2. Missing usage of -L. by distutils part of build system on some platforms: Dropping of incomplete hardcoded list (2013-09-28, CPython >=3.3.4): https://github.com/python/cpython/commit/643238eb53805bc77148adbca83cd22e34d8aeba Since this commit, self.library_dirs.append('.') is used on all platforms: > - # for extensions under Linux or Solaris with a shared Python library, > + # For building extensions with a shared Python library, > # Python's library directory must be appended to library_dirs > - sysconfig.get_config_var('Py_ENABLE_SHARED') > - if (sys.platform.startswith(('linux', 'gnu', 'sunos')) > - and sysconfig.get_config_var('Py_ENABLE_SHARED')): > + # See Issues: #1600860, #4366 > + if (sysconfig.get_config_var('Py_ENABLE_SHARED')): > if sys.executable.startswith(os.path.join(sys.exec_prefix, "bin")): > # building third party extensions > self.library_dirs.append(sysconfig.get_config_var('LIBDIR')) > else: > # building python standard extensions > self.library_dirs.append('.') Dropping of incomplete hardcoded list (2013-09-28, CPython =2.* && >=2.7.6): https://github.com/python/cpython/commit/0879b168bf73d3b7e1e6443bdf162c3ecf4f55b7
(In reply to Michael Orlitzky from comment #5) > This is only a problem in the latest beta version of SageMath (which isn't > in the tree), so a revbump is not critical. Ok, please let me know if you end up needing one. Though probably you won't because next 3.8+3.9 releases are planned for Feb 15, and 3.6+3.7 are already late one month.
