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.
PROGRAM foo
VAR_INPUT
single, interval, priority : BOOL;
END_VAR
LD single
LD interval
LD priority
END_PROGRAM
PROGRAM priority
VAR_INPUT
bar : BOOL;
END_VAR
LD bar
END_PROGRAM
PROGRAM single
VAR_INPUT
bar : BOOL;
END_VAR
LD bar
END_PROGRAM
PROGRAM interval
VAR_INPUT
bar : BOOL;
END_VAR
LD bar
END_PROGRAM
CONFIGURATION config1
TASK fast(PRIORITY := 4);
PROGRAM P1 WITH fast:
FOO(single := TRUE, interval := TRUE, priority := TRUE);
END_CONFIGURATION
CONFIGURATION config2
TASK fast(SINGLE := 3, PRIORITY := 4);
PROGRAM P1 WITH fast:
FOO(single := TRUE, interval := TRUE, priority := TRUE);
END_CONFIGURATION
CONFIGURATION config3
TASK fast(INTERVAL := T#1s, PRIORITY := 4);
PROGRAM P1 WITH fast:
FOO(single := TRUE, interval := TRUE, priority := TRUE);
END_CONFIGURATION
CONFIGURATION config4
TASK fast(SINGLE := 3, INTERVAL := T#1s, PRIORITY := 4);
PROGRAM P1 WITH fast:
FOO(single := TRUE, interval := TRUE, priority := TRUE);
END_CONFIGURATION