https://bz.apache.org/bugzilla/show_bug.cgi?id=64753
*** a/configure	2020-09-25 09:58:14.000000000 +0200
--- b/configure	2020-09-25 10:01:12.000000000 +0200
***************
*** 22913,22918 ****
--- 22913,22919 ----
  #include <errno.h>
  #include <string.h>
  #include <stdio.h>
+ #include <stdlib.h>
  main()
  {
    char buf[1024];
***************
*** 24475,24480 ****
--- 24476,24482 ----
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  /* end confdefs.h.  */
  #include <stdio.h>
+ #include <stdlib.h>
  #include <sys/types.h>
  #ifdef WIN32
  #define binmode "b"
***************
*** 24800,24805 ****
--- 24802,24808 ----
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  /* end confdefs.h.  */
  #include <stdio.h>
+ #include <stdlib.h>
  #include <sys/types.h>
  #ifdef WIN32
  #define binmode "b"
***************
*** 24864,24869 ****
--- 24867,24873 ----
  /* end confdefs.h.  */
  #include <stdio.h>
  #include <stddef.h>
+ #include <stdlib.h>
  #ifdef WIN32
  #define binmode "b"
  #else
***************
*** 24928,24933 ****
--- 24932,24938 ----
  /* end confdefs.h.  */
  #include <stdio.h>
  #include <sys/types.h>
+ #include <stdlib.h>
  #ifdef WIN32
  #define binmode "b"
  #else
***************
*** 25298,25303 ****
--- 25303,25309 ----
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  /* end confdefs.h.  */
  #include <stdio.h>
+ #include <stdlib.h>
  $ac_includes_default
  #ifdef WIN32
  #define binmode "b"
***************
*** 25584,25589 ****
--- 25590,25596 ----
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  /* end confdefs.h.  */
  #include <stdio.h>
+ #include <stdlib.h>
  #include <sys/types.h>
  #include <sys/uio.h>
  #ifdef WIN32
***************
*** 26211,26216 ****
--- 26218,26224 ----
  #include <sys/types.h>
  #include <sys/time.h>
  #include <sys/resource.h>
+ #include <stdlib.h>
  main()
  {
      struct rlimit limit;
***************
*** 26809,26814 ****
--- 26817,26823 ----
  /* end confdefs.h.  */
  
  #include <sys/types.h>
+ #include <stdlib.h>
  #include <pthread.h>
          int main()
          {
***************
*** 27454,27459 ****
--- 27463,27469 ----
  #endif
  #include <fcntl.h>
  #include <errno.h>
+ #include <stdlib.h>
  
  int fd;
  struct flock proc_mutex_lock_it = {0};
***************
*** 28763,28768 ****
--- 28773,28779 ----
  #ifndef HAVE_SOCKLEN_T
  typedef int socklen_t;
  #endif
+ #include <stdlib.h>
  int main(void) {
      int listen_s, connected_s, client_s;
      int listen_port, rc;
***************
*** 28913,28918 ****
--- 28924,28930 ----
  #ifdef HAVE_FCNTL_H
  #include <fcntl.h>
  #endif
+ #include <stdlib.h>
  int main(void) {
      int listen_s, connected_s, client_s;
      int listen_port, rc;
***************
*** 29598,29603 ****
--- 29610,29616 ----
  #ifdef HAVE_SYS_SOCKET_H
  #include <sys/socket.h>
  #endif
+ #include <stdlib.h>
  
  int main(void) {
      struct addrinfo hints, *ai;
***************
*** 29661,29666 ****
--- 29674,29680 ----
  #ifdef HAVE_NETDB_H
  #include <netdb.h>
  #endif
+ #include <stdlib.h>
  
  int main(void) {
      if (EAI_ADDRFAMILY < 0) {
***************
*** 29722,29727 ****
--- 29736,29742 ----
  #ifdef HAVE_NETINET_IN_H
  #include <netinet/in.h>
  #endif
+ #include <stdlib.h>
  
  int main(void) {
      struct sockaddr_in sa;