Description of Problem:

| $ cat >configure.ac <<'EOF'
| AC_INIT(X,1,X)
| AM_INIT_AUTOMAKE(X,1)
| AM_CONFIG_HEADER(x.h)
| AC_OUTPUT()
| EOF


gives warnings when executing autoconf:

| $ autoreconf
| configure.ac:3: warning: do not use m4_patsubst: use patsubst or m4_bpatsubst
| configure.ac:4: warning: do not use m4_regexp: use regexp or m4_bregexp
| autoreconf: `aclocal.m4' is unchanged
| autoheader: `x.h.in' is created

Since this m4_-stuff is on the M4sh/M4sugar level and has not appeared in
autoconf-2.52-4 (autoconf-2.52d) AFAIR, it may be an autoconf issue.


Version-Release number of selected/related component (if applicable):

autoconf-2.52-5
automake-1.5-2
m4-1.4.1-5