[libvirt] [Qemu-devel] [PATCH 4/7] compiler: add macro for GCC weak symbols

[Peter Maydell]

On 27 July 2012 14:37, Anthony Liguori <aliguori at us.ibm.com> wrote:
> --- a/compiler.h
> +++ b/compiler.h
> @@ -45,6 +45,7 @@
>  #  define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2)))
>  #  define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
>  # endif
> +#define GCC_WEAK __attribute__((weak))
>  #else
>  #define GCC_ATTR /**/
>  #define GCC_FMT_ATTR(n, m)

The GCC manual says "Weak symbols are supported for ELF targets,
and also for a.out targets when using the GNU assembler and linker".
Have you tested this on Windows and MacOSX ?

(Also, no version of the macro in the not-GCC branch of the #if.)

-- PMM