compile: unknown builtin '__builtin_saddl_overflow' about potion

[rurban]

Oh, so apple bumped the clang version without supporting the overflow builtins?
What is your __clang_minor__ version on this?

clang -dM -E -x c /dev/null | grep __clang_

I assumed 3.4 added this, as documented in http://llvm.org/releases/3.4/tools/clang/docs/LanguageExtensions.html#builtin-functions
but apparently apple has a different idea how to number their clang.

$ /usr/bin/clang -dM -E -x c /dev/null | grep __clang_
#define __clang__ 1
#define __clang_major__ 7
#define __clang_minor__ 0
#define __clang_patchlevel__ 0
#define __clang_version__ "7.0.0 (clang-700.0.72)"

[wollmers]

Now upgraded Xcode command line tools to 6.2, but the same compile errors. Didn't manage to upgrade Xcode, still 5.0.2. Seems you have Yosemite and Xcode 7.

$ clang -dM -E -x c /dev/null | grep __clang_
#define __clang__ 1
#define __clang_major__ 5
#define __clang_minor__ 0
#define __clang_patchlevel__ 0
#define __clang_version__ "5.0 (clang-500.2.79)"

Thx, your patch works, just throws warnings now:

  CC       src/unix/libuv_la-stream.lo
src/unix/stream.c:1054:19: warning: variable length array folded to constant array as an extension
      [-Wpedantic]
  char cmsg_space[CMSG_SPACE(UV__CMSG_FD_SIZE)];
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/sys/socket.h:517:24: note: expanded from macro 'CMSG_SPACE'
#define CMSG_SPACE(l)           (__DARWIN_ALIGN32(sizeof(struct cmsghdr)) + __DARWIN_ALIGN32(l))
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/unix/stream.c:1054:19: note: cast which performs the conversions of a reinterpret_cast is not allowed in
      a constant expression
/usr/include/sys/socket.h:517:25: note: expanded from macro 'CMSG_SPACE'
#define CMSG_SPACE(l)           (__DARWIN_ALIGN32(sizeof(struct cmsghdr)) + __DARWIN_ALIGN32(l))
                                 ^
/usr/include/i386/_param.h:43:42: note: expanded from macro '__DARWIN_ALIGN32'
#define       __DARWIN_ALIGN32(p)       ((__darwin_size_t)((char *)(__darwin_size_t)(p) + __DARWIN_AL...
                                         ^
1 warning generated.

[wollmers]

I close this issue, hope you agree.

BTW: It's really, really fast.

[rurban]

Great so 7 is the right number then. Have to fix cperl now also