src/compat/glibc_compat.cpp

   1 // Copyright (c) 2009-2014 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #if defined(HAVE_CONFIG_H)
   6 #include <config/bitcoin-config.h>
   7 #endif
   8
   9 #include <cstddef>
  10
  11 #if defined(HAVE_SYS_SELECT_H)
  12 #include <sys/select.h>
  13 #endif
  14
  15 // Prior to GLIBC_2.14, memcpy was aliased to memmove.
  16 extern "C" void* memmove(void* a, const void* b, size_t c);
  17 extern "C" void* memcpy(void* a, const void* b, size_t c)
  18 {
  19     return memmove(a, b, c);
  20 }
  21
  22 extern "C" void __chk_fail(void) __attribute__((__noreturn__));
  23 extern "C" FDELT_TYPE __fdelt_warn(FDELT_TYPE a)
  24 {
  25     if (a >= FD_SETSIZE)
  26         __chk_fail();
  27     return a / __NFDBITS;
  28 }
  29 extern "C" FDELT_TYPE __fdelt_chk(FDELT_TYPE) __attribute__((weak, alias("__fdelt_warn")));