Bruno Haible <br...@clisp.org> writes:
> On Solaris/x86, with SunPRO C 5.9, the test-func test fails. The reason
> is that
> sizeof __func__
> evaluates to 0. The compiler warns about it:
> "test-func.c", line 40: warning: null dimension: sizeof()
>
> What to do? m4/func.m4 could defined __func__ to a dummy. But that's too
> much damage IMO. Better make clear that sizeof __func__ cannot be used
> portably.
>
> Simon, what do you think?
I see no significant use-case for sizeof __func__, so working around the
problem as you propose is fine with me.
Thanks,
/Simon
> 2009-08-27 Bruno Haible <br...@clisp.org>
>
> * tests/test-func.c (main): Don't verify sizeof __func__ on SunPRO C
> compilers.
> * doc/func.texi: Document the SunPRO C bug.
>
> --- doc/func.texi.orig 2009-08-27 09:53:14.000000000 +0200
> +++ doc/func.texi 2009-08-27 09:53:03.000000000 +0200
> @@ -15,3 +15,6 @@
> printf ("%s: hello world\n", __func__);
> @}
> @end smallexample
> +
> +Note that @code{sizeof} cannot be applied to @code{__func__}: On SunPRO C
> +compiler, @code{sizeof __func__} evaluates to 0.
> --- tests/test-func.c.orig 2009-08-27 09:46:28.000000000 +0200
> +++ tests/test-func.c 2009-08-27 09:32:57.000000000 +0200
> @@ -1,5 +1,5 @@
> /* Test whether __func__ is available
> - Copyright (C) 2008 Free Software Foundation, Inc.
> + Copyright (C) 2008-2009 Free Software Foundation, Inc.
>
> This program is free software: you can redistribute it and/or modify
> it under the terms of the GNU General Public License as published by
> @@ -37,6 +37,13 @@
> int
> main ()
> {
> + ASSERT (strlen (__func__) > 0);
> +
> + /* On SunPRO C 5.9, sizeof __func__ evaluates to 0. The compiler warns:
> + "warning: null dimension: sizeof()". */
> +#if !defined __SUNPRO_C
> ASSERT (strlen (__func__) + 1 == sizeof __func__);
> +#endif
> +
> return 0;
> }
