On the Mac, building in the vm object is complicated. Instead,

rely on external files.

classpath/classpath.cpp

@@ -10,6 +10,7 @@
 
 extern "C" {
 
+#ifndef __APPLE__
   extern const uint8_t SYMBOL(start)[];
   extern const uint8_t SYMBOL(size)[];
 
@@ -19,5 +20,6 @@ extern "C" {
     *size = reinterpret_cast<uintptr_t>(SYMBOL(size));
     return SYMBOL(start);
   }
+#endif
 
 } // extern "C"

makefile

@@ -36,6 +36,11 @@ build-cc = gcc
 pthread = -pthread
 lpthread = -lpthread
 
+ifeq ($(platform),darwin)
+	pthread =
+	lpthread =
+endif
+
 cxx = $(build-cxx)
 cc = $(build-cc)
 ar = ar
@@ -190,6 +195,10 @@ classpath-classes = \
 	$(call java-classes,$(classpath-sources),$(classpath),$(classpath-build))
 classpath-object = $(native-build)/classpath-jar.o
 
+ifeq ($(platform),darwin)
+	classpath-object =
+endif
+
 test-sources = $(shell find $(test) -name '*.java')
 test-classes = $(call java-classes,$(test-sources),$(test),$(test-build))