Replace test bison version without bash regular expression.
Tested on OS X 10.8 - Linux Ubuntu 12.4 - MinGW.
IEC 61131-3 Annex F Examples (informative)
This directory contains example code take from:
Annex F of Draft 2nd edition of the IEC 61131-3 standard (1998)
"PROGRAMMABLE CONTROLLERS - PROGRAMMING LANGUAGES"