交叉编译arm64版mysql(5.6.51）

步骤跟5.6.34是类似的，这里只记录新出现的问题

报错 /home/3536_cross_src/mysql-5.6.51-arm/storage/innobase/fts/fts0fts.cc:4079:57: error: ‘os_atomic_increment_ulint’ was not declared in this scope

os_atomic_increment_ulint的定义位于 storage/innobase/include/os0sync.h

#if defined(HAVE_IB_GCC_ATOMIC_BUILTINS)
...
#else
# define IB_ATOMICS_STARTUP_MSG \
    "Mutexes and rw_locks use InnoDB's own implementation"
#endif
#ifdef HAVE_ATOMIC_BUILTINS
#define os_atomic_inc_ulint(m,v,d)  os_atomic_increment_ulint(v, d)
#define os_atomic_dec_ulint(m,v,d)  os_atomic_decrement_ulint(v, d)
#else
#define os_atomic_inc_ulint(m,v,d)  os_atomic_inc_ulint_func(m, v, d)
#define os_atomic_dec_ulint(m,v,d)  os_atomic_dec_ulint_func(m, v, d)
#endif /* HAVE_ATOMIC_BUILTINS */

而决定宏HAVE_IB_GCC_ATOMIC_BUILTINS是否定义，位于 storage/innobase/CMakeLists.txt

IF(NOT CMAKE_CROSSCOMPILING)
  CHECK_C_SOURCE_RUNS(
  "
  int main()
  {
    long        x;
    long        y;
    long        res;

    x = 10;
    y = 123;
    res = __sync_bool_compare_and_swap(&x, x, y);
    if (!res || x != y) {
      return(1);
    }

    x = 10;
    y = 123;
    res = __sync_bool_compare_and_swap(&x, x + 1, y);
    if (res || x != 10) {
      return(1);
    }
    x = 10;
    y = 123;
    res = __sync_add_and_fetch(&x, y);
    if (res != 123 + 10 || x != 123 + 10) {
      return(1);
    }
    return(0);
  }"
  HAVE_IB_GCC_ATOMIC_BUILTINS
  )

由于是交叉编译，因此这段测试程序不会被运行，因此宏也不会被定义。
解决方案，把
IF(HAVE_IB_GCC_ATOMIC_BUILTINS)
ADD_DEFINITIONS(-DHAVE_IB_GCC_ATOMIC_BUILTINS=1)
ENDIF()
IF(HAVE_IB_GCC_ATOMIC_TEST_AND_SET)
ADD_DEFINITIONS(-DHAVE_IB_GCC_ATOMIC_TEST_AND_SET=1)
ENDIF()
都改为 IF(1)