-diff -u -r ../php-5.6.15/ext/opcache/config.m4 ./ext/opcache/config.m4
---- ../php-5.6.15/ext/opcache/config.m4 2015-10-29 05:55:01.000000000 -0400
-+++ ./ext/opcache/config.m4 2015-11-10 15:24:37.080935147 -0500
-@@ -341,7 +341,15 @@
+diff -u -r ../php-7.2.3/ext/opcache/config.m4 ./ext/opcache/config.m4
+--- ../php-7.2.3/ext/opcache/config.m4 2018-02-27 16:33:06.000000000 +0000
++++ ./ext/opcache/config.m4 2018-03-10 23:38:51.259947633 +0000
+@@ -147,7 +147,9 @@
+ }
+ ],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([$msg])
+
+ AC_MSG_CHECKING(for mmap() using /dev/zero shared memory support)
+@@ -358,7 +360,15 @@
flock_type=linux
AC_DEFINE([HAVE_FLOCK_LINUX], [], [Struct flock is Linux-type])
AC_MSG_RESULT("yes")
AC_MSG_CHECKING("whether flock struct is BSD ordered")
AC_TRY_RUN([
-@@ -357,7 +365,13 @@
+@@ -374,7 +384,13 @@
flock_type=bsd
AC_DEFINE([HAVE_FLOCK_BSD], [], [Struct flock is BSD-type])
AC_MSG_RESULT("yes")
+])
+
- if test "$flock_type" == "unknown"; then
+ if test "$flock_type" = "unknown"; then
AC_MSG_ERROR([Don't know how to define struct flock on this system[,] set --enable-opcache=no])
+@@ -417,6 +433,9 @@
+ Optimizer/zend_dump.c,
+ shared,,-DZEND_ENABLE_STATIC_TSRMLS_CACHE=1,,yes)
+
++ OPCACHE_SHARED_LIBADD=-lpcre
++ PHP_SUBST(OPCACHE_SHARED_LIBADD)
++
+ PHP_ADD_BUILD_DIR([$ext_builddir/Optimizer], 1)
+ PHP_ADD_EXTENSION_DEP(opcache, pcre)
+ fi