src/compat/glibc_compat.cpp


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#include "bitcoin-config.h"
#include <cstddef>
#include <sys/select.h>

// Prior to GLIBC_2.14, memcpy was aliased to memmove.
extern "C" void* memmove(void* a, const void* b, size_t c);
extern "C" void* memcpy(void* a, const void* b, size_t c)
{
  return memmove(a, b, c);
}

extern "C" void __chk_fail (void) __attribute__((__noreturn__));
extern "C" FDELT_TYPE __fdelt_warn(FDELT_TYPE a)
{
  if (a >= FD_SETSIZE)
    __chk_fail ();
  return a / __NFDBITS;
}
extern "C" FDELT_TYPE __fdelt_chk(FDELT_TYPE) __attribute__((weak, alias("__fdelt_warn")));