diff -u -r ../php-7.3.2/ext/opcache/config.m4 ./ext/opcache/config.m4
--- ../php-7.3.2/ext/opcache/config.m4	2019-02-05 13:10:04.000000000 +0000
+++ ./ext/opcache/config.m4	2019-02-09 01:48:59.965492259 +0000
@@ -145,7 +145,9 @@
 }
 ]])],[dnl
     AC_DEFINE(HAVE_SHM_MMAP_ANON, 1, [Define if you have mmap(MAP_ANON) SHM support])
-    msg=yes],[msg=no],[msg=no])
+    msg=yes],[msg=no],
+    AC_DEFINE(HAVE_SHM_MMAP_ANON, 1, [Define if you have mmap(MAP_ANON) SHM support])
+    msg=yes)
   AC_MSG_RESULT([$msg])
 
   AC_MSG_CHECKING(for mmap() using /dev/zero shared memory support)
@@ -347,22 +349,6 @@
 if test "$flock_type" = "unknown"; then
 AC_RUN_IFELSE([AC_LANG_SOURCE([[
   #include <fcntl.h>
-  struct flock lock = { 1, 2, 3, 4, 5, 6, 7 };
-  int main() {
-    if(lock.l_type == 1 && lock.l_whence == 2 && lock.l_start == 6 && lock.l_len== 7) {
-		return 0;
-    }
-    return 1;
-  }
-]])], [
-    flock_type=aix64
-    AC_DEFINE([HAVE_FLOCK_AIX64], [], [Struct flock is 64-bit AIX-type])
-], [])
-fi
-
-if test "$flock_type" = "unknown"; then
-AC_RUN_IFELSE([AC_LANG_SOURCE([[
-  #include <fcntl.h>
   struct flock lock = { 1, 2, 3, 4, 5 };
   int main() {
     if(lock.l_type == 1 && lock.l_whence == 2 && lock.l_start == 3 && lock.l_len == 4) {
@@ -373,7 +359,12 @@
 ]])], [
 	flock_type=linux
     AC_DEFINE([HAVE_FLOCK_LINUX], [], [Struct flock is Linux-type])
-], [])
+], [], [
+    dnl cross-compiling; assume Linux
+    flock_type=linux
+    AC_DEFINE([HAVE_FLOCK_LINUX], [], [Struct flock is Linux-type])
+    AC_MSG_RESULT("yes")
+])
 fi
 
 if test "$flock_type" = "unknown"; then