[libgcc] Provide symbol to handle gcc's implicit calls to memset()
On some architectures (such as ARM), gcc will insert implicit calls to
memset(). Handle these using the same mechanism as for the implicit
calls to memcpy() used by x86.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[build] Mark __intel_new_proc_init with __libgcc rather than cdecl
The function __intel_new_proc_init() (called implicitly when building
using icc) is marked with __attribute__((cdecl)). This breaks
building on x86_64, where cdecl is meaningless.
Fix by replacing with the existing __libgcc macro, which is already
defined to be "__attribute__((cdecl))" for i386 builds and empty for
x86_64 builds.
Experimentation reveals that gcc ignores -mrtd for the implicit
arithmetic functions (e.g. __udivdi3), but not for the implicit
memcpy() and memset() functions. Mark the implicit arithmetic
functions with __attribute__((cdecl)) to compensate for this.
(Note: we cannot mark with with __cdecl, because we define __cdecl to
incorporate regparm(0) as well.)
Michael Brown