--- Makefile	(revision 514609)
+++ Makefile	(working copy)
@@ -135,6 +135,9 @@
 .if ${ARCH} != amd64
 CONFIGURE_ARGS+=	--enable-aot=no
 .endif
+.if ${ARCH} == powerpc64 && ${OSREL:C/\.[0-9]//} == 12
+EXTRA_PATCHES=		${PATCHDIR}/extra-patch-src_hotspot_cpu_ppc_vm__version__ppc.hpp
+.endif
 
 .if empty(ICONV_LIB)
 ICONV_CFLAGS=	-DLIBICONV_PLUG
--- files/extra-patch-src_hotspot_cpu_ppc_vm__version__ppc.hpp	(nonexistent)
+++ files/extra-patch-src_hotspot_cpu_ppc_vm__version__ppc.hpp	(working copy)
@@ -0,0 +1,11 @@
+--- src/hotspot/cpu/ppc/vm_version_ppc.hpp.orig	2019-10-16 11:31:09.000000000 -0700
++++ src/hotspot/cpu/ppc/vm_version_ppc.hpp	2019-10-23 12:54:06.972903000 -0700
+@@ -108,7 +108,7 @@
+   static bool has_lqarx()   { return (_features & lqarx_m) != 0; }
+   static bool has_vcipher() { return (_features & vcipher_m) != 0; }
+   static bool has_vpmsumb() { return (_features & vpmsumb_m) != 0; }
+-  static bool has_mfdscr()  { return (_features & mfdscr_m) != 0; }
++  static bool has_mfdscr()  { return false; }
+   static bool has_vsx()     { return (_features & vsx_m) != 0; }
+   static bool has_ldbrx()   { return (_features & ldbrx_m) != 0; }
+   static bool has_stdbrx()  { return (_features & stdbrx_m) != 0; }