[3.15] gh-154070: Build the curses module wide by capability, not by name (GH-154071)#154765
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[3.15] gh-154070: Build the curses module wide by capability, not by name (GH-154071)#154765serhiy-storchaka wants to merge 2 commits into
serhiy-storchaka wants to merge 2 commits into
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…ot by name (pythonGH-154071) configure built the module wide (HAVE_NCURSESW) only for a library found under the name ncursesw. Probe for the wide API too, so a widec-built ncurses keeping the plain name (pkgsrc, macOS) is built wide. 3.15 has no --with-curses, so the probe is guarded on curses being found rather than on the selected backend. (cherry picked from commit 2db8ca7) Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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July 27, 2026 11:25
This was referenced Jul 27, 2026
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The wide-character probe ran inside a nested WITH_SAVE_ENV, whose single CPPFLAGS save slot is not reentrant, so the outer restore leaked $CURSES_CFLAGS and $PANEL_CFLAGS (-D_XOPEN_SOURCE=600) into CONFIGURE_CPPFLAGS and thus into every translation unit, producing a '_XOPEN_SOURCE' redefined warning against pyconfig.h on every file. Save and restore CPPFLAGS with a dedicated variable around the probe, as on the main branch.
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Backport of GH-154071 to 3.15.
configurebuilt the module wide (HAVE_NCURSESW) only for a library found under the namencursesw. Probe for the wide API too, so a widec-built ncurses keeping the plain name (pkgsrc, macOS) is built wide.Not a clean cherry-pick: 3.15 has no
--with-curses(GH-153992 is main-only), so the probe is guarded onhave_cursesrather than on the selected backend, and it usesWITH_SAVE_ENVinstead of savingCPPFLAGSby hand -- on 3.15 the outerWITH_SAVE_ENVhas already closed at that point.