[LTP] TST_BRK_SUPPORTS_ONLY_TCONF_TBROK() error message

[Jan Stancek]

----- Original Message -----
> Hi Jan,
> 
> your commit 0738e3753 ("lib: build check parameters for tst_brk()") added
> check
> for invalid types. I guess we didn't find a way how to print meaningful error

Correct - at least not something that would work easily across all
compilers types/versions.

> message e.g. "tst_brk(): invalid type, please use TBROK/TCONF/TFAIL" as Xiao
> suggested [1]. Because error message on tst_brk(TINFO, "foo") is a bit
> confusing:
> 
> ../../../../include/tst_common.h:69:25: error: size of unnamed array is
> negative
>   do { ((void)sizeof(char[1 - 2 * !!(condition)])); } while (0)
> 
> (this is not related to current release effort)
> 
> Kind regards,
> Petr
> 
> [1] https://patchwork.ozlabs.org/comment/2026378/
> 
>