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gh-123681: Check NORMALIZE_CENTURY behavior at runtime; require C99 (GH-136022)

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A runtime check is needed to support cross-compiling.

Remove the _Py_NORMALIZE_CENTURY macro.
Remove _pydatetime.py's _can_support_c99.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Petr Viktorin 2025-08-19 12:59:03 +02:00 • committed by GitHub
parent b07a267953
commit 719e5c3f71
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8 changed files with 48 additions and 191 deletions
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104
configure generated vendored
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@ -28190,110 +28190,6 @@ printf "%s\n" "#define HAVE_STAT_TV_NSEC2 1" >>confdefs.h
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether year with century should be normalized for strftime" >&5
printf %s "checking whether year with century should be normalized for strftime... " >&6; }
if test ${ac_cv_normalize_century+y}
then :
printf %s "(cached) " >&6
else case e in #(
e)
if test "$cross_compiling" = yes
then :
ac_cv_normalize_century=yes
else case e in #(
e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <time.h>
#include <string.h>
int main(void)
{
char year[5];
struct tm date = {
.tm_year = -1801,
.tm_mon = 0,
.tm_mday = 1
};
if (strftime(year, sizeof(year), "%Y", &date) && !strcmp(year, "0099")) {
return 1;
}
return 0;
}
_ACEOF
if ac_fn_c_try_run "$LINENO"
then :
ac_cv_normalize_century=yes
else case e in #(
e) ac_cv_normalize_century=no ;;
esac
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
esac
fi
;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_normalize_century" >&5
printf "%s\n" "$ac_cv_normalize_century" >&6; }
if test "$ac_cv_normalize_century" = yes
then
printf "%s\n" "#define _Py_NORMALIZE_CENTURY 1" >>confdefs.h
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C99-compatible strftime specifiers are supported" >&5
printf %s "checking whether C99-compatible strftime specifiers are supported... " >&6; }
if test ${ac_cv_strftime_c99_support+y}
then :
printf %s "(cached) " >&6
else case e in #(
e)
if test "$cross_compiling" = yes
then :
ac_cv_strftime_c99_support=
else case e in #(
e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <time.h>
#include <string.h>
int main(void)
{
char full_date[11];
struct tm date = {
.tm_year = 0,
.tm_mon = 0,
.tm_mday = 1
};
if (strftime(full_date, sizeof(full_date), "%F", &date) && !strcmp(full_date, "1900-01-01")) {
return 0;
}
return 1;
}
_ACEOF
if ac_fn_c_try_run "$LINENO"
then :
ac_cv_strftime_c99_support=yes
else case e in #(
e) as_fn_error $? "Python requires C99-compatible strftime specifiers" "$LINENO" 5 ;;
esac
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
esac
fi
;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_strftime_c99_support" >&5
printf "%s\n" "$ac_cv_strftime_c99_support" >&6; }
have_curses=no
have_panel=no