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.
(* Following taken directly from the IEC 61131.3 draft standard *)
(*
* An IEC 61131-3 IL and ST compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*)
(*
* This is part of the library conatining the functions
* and function blocks defined in the standard.
*
* Counter function blocks
* -----------------------
*)
(******************)
(* *)
(* C T U *)
(* *)
(******************)
FUNCTION_BLOCK CTU
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : INT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : INT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_DINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : DINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : DINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_LINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : LINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : LINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_UDINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : UDINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : UDINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_ULINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : ULINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : ULINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
(******************)
(* *)
(* C T D *)
(* *)
(******************)
FUNCTION_BLOCK CTD
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : INT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : INT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_DINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : DINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : DINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_LINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : LINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : LINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_UDINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : UDINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : UDINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_ULINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : ULINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : ULINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
(********************)
(* *)
(* C T U D *)
(* *)
(********************)
FUNCTION_BLOCK CTUD
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : INT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : INT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_DINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : DINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : DINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_LINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : LINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : LINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_UDINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : UDINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : UDINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_ULINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : ULINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : ULINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK