https://issues.dlang.org/show_bug.cgi?id=23580

          Issue ID: 23580
           Summary: undefined identifier `__builtin___memcpy_chk
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: doob@me.com

Compiling the following C code:

#include <string.h>

void foo()
{
    memcpy(0, 0, 0);
}

Results in the following error:

foo.c(5): Error: undefined identifier `__builtin___memcpy_chk`

If I run the C code manually through the preprocessor "memcpy" is replaced with "__builtin___memcpy_chk".

I'm using macOS 13.0.1, DMD v2.101.1 and Xcode 14.2.

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