+dnl A C_FUNC_MEMCMP
+dnl A C_CHECK_FUNCS([memset strchr strerror usleep])
+
+# Can we rebuild the parsers?
+# We really want flex and refuse other lex. So, the parser is portable and
+# does not induce extra lib dependency
+AC_PROG_LEX
+if test "$LEX" != flex; then
+ AC_MSG_NOTICE([Will not rebuild the parsers. I want flex.])
+ LEX="$SHELL $missing_dir/missing flex";
+else
+changequote(<<, >>)dnl because of the regexp [[:blank:]]
+ FLEX_VERSION=`flex --version`;
+ FLEX_VER_MAJ=`echo $FLEX_VERSION | sed 's/[^0-9\.]*//g' | sed 's/\..*//g'`;
+ FLEX_VER_MED=`echo $FLEX_VERSION | sed 's/[^0-9\.]*//g' | sed 's/[0-9]*\.\([0-9]*\)\.[0-9]*/\1/g'`;
+ FLEX_VER_MIN=`echo $FLEX_VERSION | sed 's/[^0-9\.]*//g' | sed 's/.*\.//g'`;
+changequote([, ])dnl back to normality, there is no regexp afterward
+ if test $FLEX_VER_MAJ -lt 2 ; then
+ AC_MSG_NOTICE([Will not rebuild the parsers. Your flex is too old.])
+ LEX="$SHELL $missing_dir/missing flex";
+ else
+ if test $FLEX_VER_MAJ -eq 2 ; then
+ if test $FLEX_VER_MED -lt 5 ; then
+ AC_MSG_NOTICE([Will not rebuild the parsers. Your flex is too old.])
+ LEX="$SHELL $missing_dir/missing flex";
+ else
+ if test $FLEX_VER_MED -eq 5 ; then
+ if test $FLEX_VER_MIN -lt 31 ; then
+ AC_MSG_NOTICE([Will not rebuild the parsers. Your flex is too old.])
+ LEX="$SHELL $missing_dir/missing flex";
+ fi;
+ fi;
+ fi;
+ fi;
+ fi;
+fi
+
+# Can we rebuild the xml-lexers from the XML specification?
+# if not, simply touch the flex source files (which are distributed in
+# tarballs even if generated by flexml) and hope for the best.
+AC_CHECK_PROG(FLEXML,flexml,,NOTFOUND)
+AM_CONDITIONAL(HAVE_FLEXML,test x$FLEXML != NOTFOUND)