cmake HAVE_PTHREAD_ONCE_INIT examples

arkdb/inception configure.cmake :334 

CHECK_C_SOURCE_COMPILES("
    #include <pthread.h>
    void foo(void) {}
    int main()
    {
      pthread_once_t once_control = PTHREAD_ONCE_INIT;
      pthread_once(&once_control, foo);
      return 0;
    }"
    HAVE_PTHREAD_ONCE_INIT
  )

alibaba/AliSQL configure.cmake :439 

CHECK_C_SOURCE_COMPILES("
    #include <pthread.h>
    void foo(void) {}
    int main()
    {
      pthread_once_t once_control = PTHREAD_ONCE_INIT;
      pthread_once(&once_control, foo);
      return 0;
    }"
    HAVE_PTHREAD_ONCE_INIT
  )

Tokutek/mysql-5.5 configure.cmake :274 

CHECK_C_SOURCE_COMPILES("
    #include <pthread.h>
    void foo(void) {}
    int main()
    {
      pthread_once_t once_control = PTHREAD_ONCE_INIT;
      pthread_once(&once_control, foo);
      return 0;
    }"
    HAVE_PTHREAD_ONCE_INIT
  )