Error: possibly undefined macro: AC_PROG_GNU_M4
Background
Error compiling bison
Configure.ac:233: error: possibly undefined macro: AC_PROG_GNU_M4
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
Autoreconf: / usr/local/bin/autoconf failed with exit status: 1
. / bootstrap: autoreconf failed
Bison-3.4/m4/m4.m4 defines the AC_PROG_GNU_M4 macro definition
# AC_PROG_GNU_M4
#-
# Check for GNU M4, at least 1.4.6 (all earlier versions had bugs in
# trace support and regexp support):
# https://lists.gnu.org/archive/html/bug-gnu-utils/2006-11/msg00096.html
# https://lists.gnu.org/archive/html/bug-autoconf/2009-07/msg00023.html
# Also, check whether-- error-output (through 1.4.x) or--debugfile (2.0)
# is supported, and AC_SUBST M4_DEBUGFILE accordingly.
# Also avoid versions of m4 that trigger strstr bugs.
AC_DEFUN ([AC_PROG_GNU_M4]
[AC_ARG_VAR ([M4], [Location of GNU M4 1.4.6 or later. Defaults to the first
Program of 'm4percent, 'gm4', or' gnum4' on PATH that meets Autoconf needs.])
AC_CACHE_CHECK ([for GNU M4 that supports accurate traces], [ac_cv_path_M4]
[rm-f conftest.m4f
Ac_had_posixly_correct=$ {POSIXLY_CORRECT:+yes}
AS_UNSET ([POSIXLY_CORRECT])
AC_PATH_PROGS_FEATURE_CHECK ([M4], [M4 gm4 gnum4]