Building & Platform Compatibility

PLCIO 4.6.0 Changes

The mod/inc/*.c files are named identically to the mod/*.c files in some cases. Change the names of the mod/inc/*.c files so that the standard UNIX 'make' programs do not attempt to compile the mod/inc/*.c files directly.
Fix displaying the correct tag array index in the "Alias For" column when listing tags with the 'showcip' example program.
Minor fixes for compiling with 32-bit and older versions of GCC.
Change the top-level Makefile to stop processing directories on an error.
Add new PLC_IS_COMM_ERROR() macro for deciding when to close/reopen the PLC during a communications error.
Reformat some C code lines to be under 80 characters long.
In the 'cip' module, when the "LoadTags" option is used, fix writing to tags that are a user-defined type (UDT).
Make the 'opcua' module increment the request handle with each OPC request.
Add support for communicating to Bosch Motion and Logic Controllers (MLCs) via OPC-UA over Ethernet/TCP using the new module 'opcua'.
Change the Makefile to use "cp -f" instead of "cp -fp" when installing files.
In module 'cipio', add a new Config=# option to plc_open() that can be used to change the Configuration Instance to connect to. The default is 1.
In the 'modeth' module, remove references to "Modbus+" and make it obvious that the protocol used is "Modbus TCP" instead.
In UNIX, add code to disable generating SIGPIPE on all network communication to the PLC
Fix missing close() calls for when Windows fails to initialize a serial COM device.
Fix a small memory leak in plc_close_serial() (the device name was not being freed properly).
Rewrite serial baud rate tables in lib/transport.c so it can compile on any UNIX system based on what baud rates are #defined in the OS.
enipd daemon: Add support for receiving Execute-PCCC messages over unconnected messaging, as used by CompactLogix 1769-L33ER.
enipd daemon: Fix some off-by-one errors in packet handling.
In examples/showcip.c, properly call free() and plc_close() to aid in memory-leak testing with the CIP module.
Use an unlimited timeout for plc_open() in examples/showcip.c, to handle the case where a PLC might have over 5000 tags defined.
Reformat C code to add whitespace around += and -= operations.
Support listing tags on a Micro800-series PLC.
Make examples/showcip.c append the "Micro800" option to the plc_open() string if it gets a 0x0311 error while connecting.
Add "-p path" option to the examples/showcip.c program.
Add support for reading/writing to the "Short String" datatype (0xda) via the 'cip' module.
Add "Micro800" convienence option in the 'cip' module plc_open() string.
Add support for specifying Path=None for all CIP-related modules (cip, cipab,fins).
Switch to using Winsock2 for the header file (winsock2.h & ws2tcpip.h) and library (-lws2_32). This provides the correct definitions needed for multicast networking.
Define our own custom error code and message for EPROTO (Protocol error), which does not exist in Winsock.
Change the #define for min() and max() so it correctly takes the type of both variables into account.
Rename RANGE() to clamp().
On Windows systems, use the more precise GetSystemTimeAsFileTime() function instead of _ftime().
Add support for compiling under GCC 10.
Bring manual pages up-to-date. Add new pages for plc_cfgfname(), plc_get_softplc_list(), and plc_log_callback().
Minor fixes to lib/log.c to support plc_log_callback().
Add new function plc_log_callback(PLC_LOG_CB *pf_callback), which sets a callback function for all plc_log() routines.
Add new PLC_LOG_CB typedef.
Mark plc_log(), plc_set_error(), and plc_clear_errors() as private (internal) library functions.
Add some missing error codes found when testing the 'slmp' module.
Also in 'slmp', allow receiving back more data than requested from labels.
Export global variable as_plc_modlist[] for use by the application.
Add new global 'ps_softplc_list', which allows the application to iterate through the list of Soft PLCs found in the "plcio.cfg" PLCIO Configuration file.
Export function plc_cfgfname() for use by the application.
Add new function plc_get_softplc_list(), which reads "plcio.cfg" and regenerates the 'ps_softplc_list' global on demand.
Fix running 'make' with multiple jobs.
Only make library functions marked PLCIO_API visible in the GNU/Linux .so shared object. Further, strip the file if debugging is not enabled.
Add support for Mitsubishi PLCs using the SLMP protocol via TCP.
Add support for compiling the PLCIO library natively under Microsoft Visual Studio C++.
Provide CMakeLists.txt for generating a project .sln (solution) file in MSVC.
Add the capability for PLCIO to run statically linked in an executable:
Use "int" instead of "long" when copying 4-byte IP Addresses.
Add support for reading/writing Analog Inputs (AI), Analog Outputs (AQ), Timers (T), and Counters (C) on S7-200 PLCs.
Add new PLC type "S7-200-Smart".
Properly check for available GCC -W warning options in "configure".
Add support for compiling with GCC 8.
Add support for compiling under Cygwin.