make/hotspot/lib/JvmFeatures.gmk

*** 164,173 ****
--- 164,180 ----
  ifneq ($(call check-jvm-feature, zgc), true)
    JVM_CFLAGS_FEATURES += -DINCLUDE_ZGC=0
    JVM_EXCLUDE_PATTERNS += gc/z
  endif
  
+ ifneq ($(call check-jvm-feature, shenandoahgc), true)
+   JVM_CFLAGS_FEATURES += -DINCLUDE_SHENANDOAHGC=0
+   JVM_EXCLUDE_PATTERNS += gc/shenandoah
+ else
+   JVM_CFLAGS_FEATURES += -DSUPPORT_BARRIER_ON_PRIMITIVES -DSUPPORT_NOT_TO_SPACE_INVARIANT
+ endif
+ 
  ifneq ($(call check-jvm-feature, jfr), true)
    JVM_CFLAGS_FEATURES += -DINCLUDE_JFR=0
    JVM_EXCLUDE_PATTERNS += jfr
  endif