René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Build failure of 3.12.9 on Cygwin","articleBody":"# Bug report\n\n### Bug description:\n\n3.12.9 fails to build ctypes module on Cygwin if 3.12.8 is already installed as LIBFFI_LIBS\nhas \"-L/usr/lib/../lib\" and pull the installed version of \"libpython3.12.dll.a\" instead of the built one.\n\n```\n$ grep  -s -- \"-L/usr/lib\" config.status\n\"MODULE__CTYPES_LDFLAGS=-L/usr/lib/../lib -lffi -ldl\\n\"\\\nS[\"LIBFFI_LIBS\"]=\"-L/usr/lib/../lib -lffi -ldl\"\n```\n\nfailed module:\n```\ngcc -shared -Wl,--enable-auto-image-base      Modules/_ctypes/_ctypes.o Modules/_ctypes/callbacks.o Modules/_ctypes/callproc.o Modules/_ctypes/stgdict.o Modules/_ctypes/cfield.o -L/usr/lib/../lib -lffi -ldl -L. -lpython3.12 -o Modules/_ctypes.cpython-312-x86_64-cygwin.dll\n/usr/lib/gcc/x86_64-pc-cygwin/12/../../../../x86_64-pc-cygwin/bin/ld: Modules/_ctypes/callproc.o: in function `py_dl_close':\n/usr/src/debug/python312-3.12.9-1/Modules/_ctypes/callproc.c:1573:(.text+0x5b8): undefined reference to `_PyErr_SetLocaleString'\n/usr/lib/gcc/x86_64-pc-cygwin/12/../../../../x86_64-pc-cygwin/bin/ld: Modules/_ctypes/callproc.o: in function `py_dl_open':\n/usr/src/debug/python312-3.12.9-1/Modules/_ctypes/callproc.c:1555:(.text+0x6f8): undefined reference to `_PyErr_SetLocaleString'\ncollect2: error: ld returned 1 exit status\nmake: *** [Makefile:3130: Modules/_ctypes.cpython-312-x86_64-cygwin.dll] Error 1\n```\n\ninverting the order of library search solves the issue\n\n`$ gcc -shared -Wl,--enable-auto-image-base      Modules/_ctypes/_ctypes.o Modules/_ctypes/callbacks.o Modules/_ctypes/callproc.o Modules/_ctypes/stgdict.o Modules/_ctypes/cfield.o -L. -L/usr/lib/../lib -lffi -ldl  -lpython3.12 -o Modules/_ctypes.cpython-312-x86_64-cygwin.dll`\n```\n\n\n### CPython versions tested on:\n\n3.12\n\n### Operating systems tested on:\n\nOther","author":{"url":"https://github.com/matzeri","@type":"Person","name":"matzeri"},"datePublished":"2025-02-21T21:42:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/130423/cpython/issues/130423"}