Add check bison version in configure.ac file.
To build correctly matiec we need bison greater or equals than 2.4 version.
Now the "configure" script is able to check if system has correctly requirements.
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.plcopen.org/xml/tc6.xsd"
xmlns:xhtml="http://www.w3.org/1999/xhtml"
xsi:schemaLocation="http://www.plcopen.org/xml/tc6.xsd http://www.plcopen.org/xml/tc6.xsd">
<fileHeader contentDescription="This tests LD language"
companyName="Beremiz"
companyURL="www.beremiz.org"
productName="BREMIZ"
productRelease="1"
productVersion="1"
creationDateTime="2007-07-07 11:58:26"/>
<contentHeader name="LD_TEST">
<coordinateInfo>
<fbd>
<scaling y="0" x="0"/>
</fbd>
<ld>
<scaling y="0" x="0"/>
</ld>
<sfc>
<scaling y="0" x="0"/>
</sfc>
</coordinateInfo>
</contentHeader>
<types>
<dataTypes/>
<pous>
<pou name="MAIN_TEST" pouType="program">
<interface>
<localVars>
<variable name="QX1" address="%QX1">
<type>
<BOOL/>
</type>
</variable>
<variable name="QX2" address="%QX2">
<type>
<BOOL/>
</type>
</variable>
<variable name="QX3" address="%QX3">
<type>
<BOOL/>
</type>
</variable>
<variable name="IX1" address="%IX1">
<type>
<BOOL/>
</type>
</variable>
<variable name="IX2" address="%IX2">
<type>
<BOOL/>
</type>
</variable>
<variable name="IX3" address="%IX3">
<type>
<BOOL/>
</type>
</variable>
</localVars>
</interface>
<body>
<LD>
</LD>
</body>
</pou>
</pous>
</types>
<instances>
<configurations>
<configuration name="STD_CONF">
<resource name="STD_RESSOURCE">
<task interval="00:00:00.100000" name="STD_TASK" priority="0"/>
<pouInstance type="MAIN_TEST" name="MAIN_INSTANCE"/>
</resource>
</configuration>
</configurations>
</instances>
</project>