Following Error when i tried to install m4.

Making all in doc
Updating ./version.texi
restore=: && backupdir=".am$$" &&  am__cwd=`pwd` && CDPATH="${ZSH_VERSION+.}:" && cd . &&  rm -rf $backupdir && mkdir $backupdir && if (makeinfo --no-split --version) >/dev/null 2>&1; then  for f in ./m4.info ./m4.info-[0-9] ./m4.info-[0-9][0-9] ./m4.i[0-9] ./m4.i[0-9][0-9]; do  if test -f $f; then mv $f $backupdir; restore=mv; else :; fi;  done;  else :; fi &&  cd "$am__cwd";  if makeinfo --no-split   -I .  -o ./m4.info ./m4.texinfo;  then  rc=0;  CDPATH="${ZSH_VERSION+.}:" && cd .;  else  rc=$?;  CDPATH="${ZSH_VERSION+.}:" && cd . &&  $restore $backupdir/* `echo "././m4.info" | sed 's|[^/]*$||'`;  fi;  rm -rf $backupdir; exit $rc
./m4.texinfo:486: Unknown command `'.
./m4.texinfo:2670: Unknown command `'.
./m4.texinfo:2672: Unknown command `'.
./m4.texinfo:2886: Unknown command `'.
./m4.texinfo:8231: Unknown command `'.
./m4.texinfo:8233: Unknown command `'.
makeinfo: Removing output file `./m4.info' due to errors; use --force to preserve.
*** Error code 1
 
Stop in /usr/ports/devel/m4/work/m4-1.4.13/doc.
*** Error code 1
 
Stop in /usr/ports/devel/m4/work/m4-1.4.13.
*** Error code 1
 
Stop in /usr/ports/devel/m4/work/m4-1.4.13.
*** Error code 1
 
Stop in /usr/ports/devel/m4.
*** Error code 1
 
Stop in /usr/ports/devel/m4.

After search found it is due to the outdated makeinfo programm.

Create following file :

| /usr/ports/devel/m4/Makefile.local

BUILD_DEPENDS+= ${LOCALBASE}/bin/makeinfo:${PORTSDIR}/print/texinfo
CONFIGURE_ENV= MAKEINFO="${LOCALBASE}/bin/makeinfo --no-split"

This will do it.