Re: [Qemu-trivial] [Qemu-devel] [PATCH] configure: disable clang -Wstring-plus-int warning

[Peter Maydell]

Ping for qemu-trivial now 1.7 is open.

thanks
-- PMM

On 5 August 2013 20:16, Peter Maydell <address@hidden> wrote:
> Some versions of clang will warn about adding integers to strings:
>
> disas/i386.c:4753:23: error: adding 'char' to a string does not append
>       to the string [-Werror,-Wstring-plus-int]
>       oappend ("%es:" + intel_syntax);
>                ~~~~~~~^~~~~~~~~~~~~~
> disas/i386.c:4753:23: note: use array indexing to silence this warning
>       oappend ("%es:" + intel_syntax);
>                       ^
>                &      [             ]
>
> disas/i386.c uses this idiom to to skip a "%" prefix if using intel
> rather than AT&T syntax. This seems like a reasonable  thing to do,
> and I don't think anybody contributing to QEMU is likely to believe
> that '+' is a string concatenation operator in C, so just disable
> -Wstring-plus-int.
>
> Signed-off-by: Peter Maydell <address@hidden>
> ---
>  configure |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/configure b/configure
> index a3bd9be..a1d1701 100755
> --- a/configure
> +++ b/configure
> @@ -1204,6 +1204,7 @@ gcc_flags="-Wformat-security -Wformat-y2k -Winit-self 
> -Wignored-qualifiers $gcc_
>  gcc_flags="-Wmissing-include-dirs -Wempty-body -Wnested-externs $gcc_flags"
>  gcc_flags="-Wendif-labels $gcc_flags"
>  gcc_flags="-Wno-initializer-overrides $gcc_flags"
> +gcc_flags="-Wno-string-plus-int $gcc_flags"
>  # Note that we do not add -Werror to gcc_flags here, because that would
>  # enable it for all configure tests. If a configure test failed due
>  # to -Werror this would just silently disable some features,
> --
> 1.7.9.5
>
>