Cannot parse macOS SDK <stdlib.h>

[IsaacShelton]

I'm not sure if this is in the scope of this project, but it seems <stdlib.h> cannot be parsed on macOS.

syntax error: unexpected token at "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/mach/arm/_structs.h" line 498 column 2, expected '<typedef_name>', '}'
  included from tests/thing.h:6
  included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:66
  included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/wait.h:109
  included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/signal.h:146
  included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/machine/_mcontext.h:34
  included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/arm/_mcontext.h:36
  included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/mach/machine/_structs.h:35

From looking at the error, it looks like it gets stuck on the __uint128_t and __uint32_t built-in types of the following definition:

struct __darwin_arm_neon_state64
{
 __uint128_t __v[32];
 __uint32_t __fpsr;
 __uint32_t __fpcr;
};

I tried specifying the flavor, but seems not to help