AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_RANLIB
-AC_PROG_LEX
-AC_PROG_YACC
AC_CHECK_PROG(AUTOCONF, autoconf, autoconf, :)
AC_CHECK_PROG(STRIP, strip, strip, :)
AC_CHECK_PROG(AS, as, as, :)
AC_CHECK_PROG(CP, cp, cp, :)
+dnl Don't use AC_PROG_LEX
+dnl LEXLIB is not useful in gcc.
+AC_CHECK_PROGS(LEX, flex lex, :)
+
+dnl Don't use AC_PROG_YACC
+AC_CHECK_PROGS(YACC, 'bison -y' byacc yacc, :)
+
AC_DEFUN(SDCC_REQUIRE_PROG,
[if test "$1" = ":"; then
AC_MSG_ERROR([Cannot find required program $2.])
])
SDCC_REQUIRE_PROG($YACC, bison)
-SDCC_REQUIRE_PROG($LEX, lex)
+SDCC_REQUIRE_PROG($LEX, flex)
AC_LANG_C