[3.10] bpo-46513: Remove AC_C_CHAR_UNSIGNED / __CHAR_UNSIGNED__ (GH-30851) (GH-30914) by tiran · Pull Request #30914 · python/cpython
# checks for compiler characteristics
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether char is unsigned" >&5 $as_echo_n "checking whether char is unsigned... " >&6; } if ${ac_cv_c_char_unsigned+:} false; then : $as_echo_n "(cached) " >&6 else cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ $ac_includes_default int main () { static int test_array [1 - 2 * !(((char) -1) < 0)]; test_array [0] = 0; return test_array [0];
; return 0; } _ACEOF if ac_fn_c_try_compile "$LINENO"; then : ac_cv_c_char_unsigned=no else ac_cv_c_char_unsigned=yes fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_char_unsigned" >&5 $as_echo "$ac_cv_c_char_unsigned" >&6; } if test $ac_cv_c_char_unsigned = yes && test "$GCC" != yes; then $as_echo "#define __CHAR_UNSIGNED__ 1" >>confdefs.h
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5 $as_echo_n "checking for an ANSI C-conforming const... " >&6; } if ${ac_cv_c_const+:} false; then :