diff -uNr php-8.0.0.orig/ext/opcache/config.m4 php-8.0.0/ext/opcache/config.m4
--- php-8.0.0.orig/ext/opcache/config.m4	2020-11-24 22:34:03.000000000 +0530
+++ php-8.0.0/ext/opcache/config.m4	2020-12-06 21:26:14.225669677 +0530
@@ -219,7 +219,9 @@
 }
 ]])],[dnl
     AC_DEFINE(HAVE_SHM_MMAP_ANON, 1, [Define if you have mmap(MAP_ANON) SHM support])
-    have_shm_mmap_anon=yes],[have_shm_mmap_anon=no],[have_shm_mmap_anon=no])
+    have_shm_mmap_anon=yes],[have_shm_mmap_anon=no],
+    AC_DEFINE(HAVE_SHM_MMAP_ANON, 1, [Define if you have mmap(MAP_ANON) SHM support])
+    have_shm_mmap_anon=yes)
   AC_MSG_RESULT([$have_shm_mmap_anon=yes])
 
   PHP_CHECK_FUNC_LIB(shm_open, rt, root)
@@ -336,6 +338,9 @@
 	$ZEND_JIT_SRC,
 	shared,,-DZEND_ENABLE_STATIC_TSRMLS_CACHE=1,,yes)
 
+  OPCACHE_SHARED_LIBADD=-lpcre2-8
+  PHP_SUBST(OPCACHE_SHARED_LIBADD)
+
   PHP_ADD_BUILD_DIR([$ext_builddir/Optimizer], 1)
   PHP_ADD_EXTENSION_DEP(opcache, pcre)