[ECOS] casts to a type other than an integral or enumeration type in a constant-expression

[Fred Fish <fnf at public dot ninemoons dot com>]

The latest eCos sources no longer build with the latest gcc.  The
problem can be tracked down to C++ code like the following in eCos:

  #include <signal.h>

  void foo (__sighandler_t __sighdl)
  {
    switch ((int) __sighdl)
      {
      case (int) SIG_DFL:
        ;
      case (int) SIG_IGN:
        ;
      }
  }

Using "gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)" I get:

  $ /usr/bin/g++ -c b.c
  $

Using "gcc version 3.4 20030211 (experimental)" I get:

  $ /usr/local/sourceware/bin/g++ -c b.c
  b.c: In function `void foo(void (*)(int))':
  b.c:7: error: a casts to a type other than an integral or enumeration type
     cannot appear in a constant-expression
  b.c:9: error: a casts to a type other than an integral or enumeration type
     cannot appear in a constant-expression
  $

Since it's unclear to me if this is a case of g++ becoming more picky
or the eCos code not being C++ compliant, I'm posting this to both the
eCos discussion list and the gcc bugs discussion list for comment.

If the compiler is correct, then I presume the eCos code needs to change
to something like:

    if (__sighdl == SIG_DFL)
      {
	...
      }
    else if (__sighdl == SIG_IGN)
      {
        ...
      }

-Fred

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