Re: Epics C++ Problems

[hill@luke.atdiv.lanl.gov (Jeff Hill)]

Hello all,

> 
> I have the following problem with the EPICS cadef.h file:
> This gives this warning with the SUN (C++) compiler:
> 
> "./epics.3.12.1/base/include/cadef.h", line 218: Warning (Anachronism): Redefining chid after use in event_handler_args.
> "./epics.3.12.1/base/include/cadef.h", line 218: Note: Type "CC -migration" for more on anachronisms.
> "./epics.3.12.1/base/include/cadef.h", line 257: Warning (Anachronism): Redefining chid after use in exception_handler_args.
> 
> and even worse it is a syntax error! with GNU g++ compiler
> 
> It compiles, when the name is changed. e.g. chid chidname
> 
> Can somebody help me ?!
> 

This problem was also detected by Jim Kowalkowski at APS. A 
changed cadef.h supporting the new C++ compilers will show up 
in EPICS 3.12.2.

In the short term you can fix the problem by replacing all 
instances of the field declaration "chid chid" found within 
a structure declaration with "struct channel_in_use *chid".
There are only 3 lines that require changes. Function prototypes
do not require modification.

Note that this is only a problem for folks programming with the
more recent C++ compilers and is not a problem for ANSI/traditional
C programs.

Jeff


______________________________________________________________________
Jeffrey O. Hill			Internet	johill@lanl.gov
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