Re: old-style cast warnings

[John W. Eaton]

On  5-Sep-2012, Rik wrote:

| I don't know if you're still bothered by it, but I think I know a way to
| mask the warnings in the parse-tree directory.  The problem is that we use
| auto-generated code from the outside utilities Flex and Yacc.  These
| programs are going to be using old-style casts and there isn't much we can
| do about that.
| 
| In the current build system there is a rule which attempts to turn off the
| old-style cast warning.  It is in parse-tree/module.mk and is shown below.
| 
| lex.lo lex.o oct-parse.lo oct-parse.o: \
|   AM_CXXFLAGS := $(filter-out -Wold-style-cast, $(AM_CXXFLAGS))
| 
| The problem is that Automake does not support per-object compilation rules
| so the two lines above do nothing.  But, Automake does detail how to
| emulate per-object rules here
| 
(http://www.gnu.org/software/automake/manual/html_node/Per_002dObject-Flags.html).
 
| It would be quite easy to use their strategy and turn off the warnings for
| these particular files which we know are going to have old code constructs.
| 
| If you're interested this seems like a reasonable solution or we can just
| let it ride.

It then also disables warnings for C-style casts that appear in the
code we've written in lex.ll.

I'd say leave it alone.

jwe