1 --- autoconf-2.72/lib/autoconf/general.m4.orig 2023-12-25 17:50:44.269509270 +0100
2 +++ autoconf-2.72/lib/autoconf/general.m4 2023-12-25 17:51:39.592542892 +0100
3 @@ -2773,7 +2773,7 @@ AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])
4 AS_IF([dnl eval is necessary to expand ac_cpp.
5 dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
6 (eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
7 -dnl Quote $1 to prevent m4 from eating character classes
8 +dnl Quote first arg to prevent m4 from eating character classes
9 $EGREP_TRADITIONAL "m4_bregexp([$1],[^[$-]],[.?])[$1]" >/dev/null 2>&1],