fix issues that cause mu_refimpl2_new and mu_refimpl2_new_ex to return NULL always (hopefully)

cbinding/Makefile

-CFLAGS += -std=gnu11
-
 ifndef JAVA_HOME
     $(error JAVA_HOME is required. Invoke with 'make JAVA_HOME=/path/to/java/home')
 endif
 
-CFLAGS += -I $(JAVA_HOME)/include
+CFLAGS += -std=gnu11 -g -I $(JAVA_HOME)/include
 
 ifndef OS
 	uname := $(shell uname)
 	ifeq ($(uname),Darwin)
 		OS = OSX
-    else
-    ifeq ($(uname),Linux)
+    else ifeq ($(uname),Linux)
 		OS = LINUX
     else
 		$(error Unrecognized operating system $(uname). I currently only worked on OSX and Linux.)
     endif
-    endif
 endif
 
 ifeq ($(OS),OSX)
 	CFLAGS += -I $(JAVA_HOME)/include/darwin
 	LDFLAGS += -L $(JAVA_HOME)/jre/lib/server -l jvm -rpath $(JAVA_HOME)/jre/lib/server -install_name '@rpath/libmurefimpl2start.so'
-endif
-
-ifeq ($(OS),LINUX)
+else ifeq ($(OS),LINUX)
 	CFLAGS += -I $(JAVA_HOME)/include/linux
 	LDFLAGS += -Wl,--no-as-needed -L $(JAVA_HOME)/jre/lib/amd64/server -l jvm -Wl,-rpath,$(JAVA_HOME)/jre/lib/amd64/server
 endif
 
-
 .PHONY: all
 all: libs tests
 
@@ -56,10 +49,8 @@ test_client2: test_client2.c libmurefimpl2start.so
 	$(CC) `./refimpl2-config --istart --cflags --libs` -o $@ $<
 
 .PHONY: clean veryclean
-
 clean:
-	rm *.so test_client test_client2
+	rm -f *.so test_client test_client2
 
-veryclean:
-	rm *.so test_client test_client2 classpath.txt classpath.h
-	rm ../classpath.txt
+veryclean: clean
+	rm -f classpath.txt classpath.h ../classpath.txt

cbinding/refimpl2-config

@@ -37,7 +37,3 @@ if '--istart' in args:
 else:
     if '--cflags' in args:
         print("-I {} ".format(whereami), end="")
-    if '--libs' in args:
-        pass
-
-

cbinding/test_client2.c

@@ -21,7 +21,7 @@ const char *gc_conf =
 "vmLog=DEBUG\n"
 ;
 
-const char *boot_image_name = "test_client2_bootimg.mu";
+char *boot_image_name = "test_client2_bootimg.mu";
 
 int *muerrno;