(removed some non-x86 lists and folks from recipients)
El Thu, Mar 16, 2017 at 05:15:17PM -0700 Michael Davidson ha dit:
> undef memcpy and friends in boot/string.c so that the functions
> defined here will have the correct names, otherwise we end up
> up trying to redefine __builtin_memcpy etc.
> Surprisingly, gcc allows this (and, helpfully, discards the
> __builtin_ prefix from the function name when compiling it),
> but clang does not.
>
> Adding these #undef's appears to preserve what I assume was
> the original intent of the code.
Any comments on this patch?
> Signed-off-by: Michael Davidson <m...@google.com>
> ---
> arch/x86/boot/string.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/x86/boot/string.c b/arch/x86/boot/string.c
> index 5457b02fc050..b40266850869 100644
> --- a/arch/x86/boot/string.c
> +++ b/arch/x86/boot/string.c
> @@ -16,6 +16,15 @@
> #include "ctype.h"
> #include "string.h"
>
> +/*
> + * Undef these macros so that the functions that we provide
> + * here will have the correct names regardless of how string.h
> + * may have chosen to #define them.
> + */
> +#undef memcpy
> +#undef memset
> +#undef memcmp
> +
> int memcmp(const void *s1, const void *s2, size_t len)
> {
> bool diff;
