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Taken from alpine, with additional fixes
https://bugs.gentoo.org/713306
--- a/libhashkit/fnv_64.cc
+++ b/libhashkit/fnv_64.cc
@@ -37,8 +37,9 @@
#include <libhashkit/common.h>
+#include <limits.h>
-#if __WORDSIZE == 64 && defined(HAVE_FNV64_HASH)
+#if (LONG_BIT == 64) && defined(HAVE_FNV64_HASH)
/* FNV hash'es lifted from Dustin Sallings work */
static uint64_t FNV_64_INIT= 0xcbf29ce484222325;
--- a/libhashkit/has.cc
+++ b/libhashkit/has.cc
@@ -37,6 +37,7 @@
#include <libhashkit/common.h>
+#include <limits.h>
bool libhashkit_has_algorithm(const hashkit_hash_algorithm_t algo)
{
@@ -44,7 +45,7 @@
{
case HASHKIT_HASH_FNV1_64:
case HASHKIT_HASH_FNV1A_64:
-#if __WORDSIZE == 64 && defined(HAVE_FNV64_HASH)
+#if (LONG_BIT == 64) && defined(HAVE_FNV64_HASH)
return true;
#else
return false;
--- a/libmemcachedutil/pool.cc
+++ b/libmemcachedutil/pool.cc
@@ -42,6 +42,7 @@
#include <cerrno>
#include <pthread.h>
#include <memory>
+#include <string.h>
struct memcached_pool_st
{
--- a/libtest/cmdline.cc
+++ b/libtest/cmdline.cc
@@ -61,7 +61,7 @@
#include <algorithm>
#include <stdexcept>
-#ifndef __USE_GNU
+#ifndef _GNU_SOURCE
static char **environ= NULL;
#endif
@@ -201,7 +201,7 @@
fatal_assert(posix_spawnattr_setsigmask(&spawnattr, &mask) == 0);
-#if defined(POSIX_SPAWN_USEVFORK) || defined(__linux__)
+#if defined(POSIX_SPAWN_USEVFORK) || defined(__GLIBC__)
// Use USEVFORK on linux
flags |= POSIX_SPAWN_USEVFORK;
#endif
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