Hi Ralf, In response to:
http://lists.gnu.org/archive/html/bug-autoconf/2007-09/msg00028.html I hope this makes the difference. I installed it as part of: http://git.sv.gnu.org/gitweb/?p=autoconf.git;a=commit;h=83294ab diff --git a/m4/m4.m4 b/m4/m4.m4 index 70f3076..711bd58 100644 --- a/m4/m4.m4 +++ b/m4/m4.m4 @@ -17,7 +17,9 @@ AC_DEFUN([AC_PROG_GNU_M4], AC_CACHE_CHECK([for GNU M4 that supports accurate traces], [ac_cv_path_M4], [AC_PATH_PROGS_FEATURE_CHECK([M4], [m4 gm4 gnum4], [dnl Creative quoting here to avoid raw dnl and ifdef in configure. - test -z "`echo if'def(mac,bug)d'nl | $ac_path_M4 --trace=mac 2>&1`" \ + # Root out GNU M4 1.4.4, as well as non-GNU m4 that ignore --trace. + ac_snippet=change'quote(<,>)in''dir(<if''def>,mac,bug)d'nl + test -z "`echo $ac_snippet | $ac_path_M4 --trace=mac 2>&1`" \ && ac_cv_path_M4=$ac_path_M4 ac_path_M4_found=:], [AC_MSG_ERROR([no acceptable m4 could be found in \$PATH. GNU M4 1.4.5 or later is required; 1.4.8 is recommended])])])
