New submission from Erik Bray <erik.m.b...@gmail.com>:
Since issue30860, libpython is no longer able to be linked as a shared library, because built-in modules are not compiled with the correct external linkage flags. This is due to the removal of -DPy_BUILD_CORE, which in pyport.h is used to control wither __declspec(dllexport) is used as opposed to __declspec(dllimport). Fortunately Eric Snow already added in https://github.com/python/cpython/pull/3458 a new flag Py_BUILD_CORE_BUILTIN which is used sparingly on Windows, and which should also be used, e.g. on Cygwin or MinGW, when compiling modules that are linked into libpython as built-ins. It sets the right external linkage flags without carrying the additional weight of Py_BUILD_CORE. This along with issue34211 need to be fixed in order to get Python 3.7+ building on Cygwin again. ---------- components: Build keywords: 3.7regression messages: 322316 nosy: erik.bray priority: normal severity: normal status: open title: Cygwin link failure with builtin modules since issue30860 versions: Python 3.7, Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34212> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
