/usr/share/aclocal-1.4/lex.m4 is in automake1.4 1:1.4-p6-13.1.
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1 2 3 4 5 6 7 8 9 10 | ## Replacement for AC_PROG_LEX and AC_DECL_YYTEXT
## by Alexandre Oliva <oliva@dcc.unicamp.br>
dnl AM_PROG_LEX
dnl Look for flex, lex or missing, then run AC_PROG_LEX and AC_DECL_YYTEXT
AC_DEFUN([AM_PROG_LEX],
[missing_dir=ifelse([$1],,`cd $ac_aux_dir && pwd`,$1)
AC_CHECK_PROGS(LEX, flex lex, $missing_dir/missing flex)
AC_PROG_LEX
AC_DECL_YYTEXT])
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