Re: [libvirt] [Qemu-devel] [PATCH 4/7] compiler: add macro for GCC weak symbols
Peter Maydell <peter.maydell(a)linaro.org> writes:
On 27 July 2012 14:37, Anthony Liguori <aliguori(a)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 ?
Weak symbols are supposed to be supported by mingw32.
I have no idea about MacOS X.
I have no way to develop or test for MacOS X using free software so I
honestly don't care about it.
Regards,
Anthony Liguori
(Also, no version of the macro in the not-GCC branch of the #if.)
-- PMM