Merge with 01068ccb73b202b2872d4117ad01984bac956cbb

Fix make on system without mercurial installed.

delete code no longer needed.

Implement get_type_decl(), as it seems Manuele will need it later...

Cleaning up: Getting some sense into the code handling structures.

Add automatic HG changeset id information in "-v" param

Add iec2iec building in the project Makefiles.

Update which files to ignore due to new autotools building environment.

Add checks for undefined structure elements used IEC 61131-3 source code being compiled.

Ignore underscores when extracting value of integer.

Deleting unused code.

Removing Makefiles made redundant by autotools.

fix bug report email address.

Add print version command line option.

Remove debugging printf() added by mistake in previous commit.

Print error messages when data type errors in ST expressions are detected.

Include (again!) the declaration of standard functions (incorrectly removed -again- in previous commit)

Add support for '**' (power) operator in ST expressions

Some more comments on how to build, and correcting name of README.build file.

Include the declaration of standard functions (incorrectly removed in previous commit)

Merging with Laurent's repository.

Fixing automake configuration to work properly with flex and bison.

Building compiler with autoconf. Thanks go to Matteo of sirius-es.it

Support for semantic verification of calls to standard functions.
Removing files no longer required.

Support for semantic verification of calls to standard function calls.
Adding missing files in previous commit.

Support for semantic verification of calls to standard functions.
This commit makes a fundamental change in the way standard functions are handled by the compiler.

Fixing exponentiation used with symbol **

Fix bugs in exponentiation

Fix case statement in ST, adding support for enumerated types

Adding BYTE operators visit functions in inlinefcall

Fix bug with DIV and MOD operator in IL code generator

Fix bug in suffix of inlinefcall call in ST and IL

Remove inclusion of missing file in lib

Commiting merge with Mario's repository

commiting merge with Laurent's repository

changing 'make' to '$(MAKE)' so other make tools (e.g. gmake) may also be used.

Replacing extern declaration with #include of apropriate header file

Adding some comments, and removing a check for a semantic error in code being compiled.

Fix bug with inline function call in POU programmed in IL

Fix bug in function calls with literal parameters

Fix makefiles when not using make as make tool

Fix bug on initialization of temp variables not using setter

Fix bug when trying to find the type of a NULL symbol

Fix bug in inline function calls when using function with undetermined type interface with literals as input

Fix warnings when compiling matiec

Fix warning on nop statement at the end of function_block and program generated code

Adding double underscore in computed enumerated value to avoid conflict with other user defined identifiers

Add support for finding type of a constant enumerated value and managing conflict between same identifiers defined in different enumerated data types

Fix bug in declaring variable of enumerated type

Fix what I think is a bug (has not yet manifested itself).

Merging with Lauren't recent change.

Merging two previous commits.

Clean up some code.

Fix bug with array attribute in structure declaration

Add better comments, and change name of functions to clarify what they do.

Remove incorect debugging assertion.

Skip CONFIGURATION declarations in stage 3 for now, so semantic analysis does not stop when a configuration is encountered.

Fix bug when generating initial value for function return type when it is a complex type

Fix bug in debugging variable list compilation with structure and array disabling

Fix bug with TRUNC function and with type conversion functions called with constant as parameter