--- _Makefile	2020-03-31 10:09:49.894814332 +0200
+++ Makefile	2020-03-31 11:53:56.772513565 +0200
@@ -61,6 +61,7 @@
 ifneq ($(ARCH),axp)
 ifneq ($(ARCH),ia64)
 ifneq ($(ARCH),ppc)
+ifneq ($(ARCH),ppc64)
 ifneq ($(ARCH),sparc)
 $(error arch $(ARCH) is currently not supported)
 endif
@@ -69,6 +70,7 @@
 endif
 endif
 endif
+endif
 
 CC=gcc
 
@@ -83,6 +85,11 @@
 	-fomit-frame-pointer -fexpensive-optimizations
 endif
 
+ifeq ($(ARCH),ppc64)
+OPT_CFLAGS=-O2 -ffast-math -funroll-loops \
+        -fomit-frame-pointer -fexpensive-optimizations
+endif
+
 ifeq ($(ARCH),sparc)
 OPT_CFLAGS=-ffast-math -funroll-loops \
 	-fomit-frame-pointer -fexpensive-optimizations
@@ -324,7 +331,7 @@
  ifeq ($(strip $(BUILD_SDLQUAKE2)),YES)
   TARGETS += $(BUILDDIR)/sdlquake2
  endif
- 
+
  ifeq ($(strip $(BUILD_SVGA)),YES)
   $(warning Warning: SVGAlib support not supported for $(ARCH))
  endif
@@ -350,6 +357,36 @@
  endif
 endif # ARCH ppc
 
+ifeq ($(ARCH),ppc64)
+ ifeq ($(strip $(BUILD_SDLQUAKE2)),YES)
+  TARGETS += $(BUILDDIR)/sdlquake2
+ endif
+
+ ifeq ($(strip $(BUILD_SVGA)),YES)
+  $(warning Warning: SVGAlib support not supported for $(ARCH))
+ endif
+
+ ifeq ($(strip $(BUILD_X11)),YES)
+  TARGETS += $(BUILDDIR)/ref_softx.$(SHLIBEXT)
+ endif
+
+ ifeq ($(strip $(BUILD_GLX)),YES)
+  TARGETS += $(BUILDDIR)/ref_glx.$(SHLIBEXT)
+ endif
+
+ ifeq ($(strip $(BUILD_FXGL)),YES)
+  $(warning Warning: FXGL support not supported for $(ARCH))
+ endif
+
+ ifeq ($(strip $(BUILD_SDL)),YES)
+  TARGETS += $(BUILDDIR)/ref_softsdl.$(SHLIBEXT)
+ endif
+
+ ifeq ($(strip $(BUILD_SDLGL)),YES)
+  TARGETS += $(BUILDDIR)/ref_sdlgl.$(SHLIBEXT)
+ endif
+endif # ARCH ppc64
+
 ifeq ($(ARCH),sparc)
  ifeq ($(strip $(BUILD_SDLQUAKE2)),YES)
   TARGETS += $(BUILDDIR)/sdlquake2