diff --git a/Makefile b/Makefile
index 6e0edcf..44531f3 100644
--- a/Makefile
+++ b/Makefile
@@ -9,37 +9,28 @@
 
 ecc_platform=2
 
-src = $(wildcard pc/*.c) $(wildcard fido2/*.c) $(wildcard fido2/extensions/*.c) \
-	$(wildcard crypto/sha256/*.c) crypto/tiny-AES-c/aes.c
+src = pc/device.c # pc/main.c
 
-obj = $(src:.c=.o) crypto/micro-ecc/uECC.o
+obj = $(src:.c=.o)
 
 LIBCBOR = tinycbor/lib/libtinycbor.a
+LIBSOLO = fido2/libsolo.a
 
 ifeq ($(shell uname -s),Darwin)
   export LDFLAGS = -Wl,-dead_strip
 else
   export LDFLAGS = -Wl,--gc-sections
 endif
-LDFLAGS += $(LIBCBOR)
+LDFLAGS += $(LIBCBOR) $(LIBSOLO)
 
-VERSION_FULL:=$(shell git describe)
-VERSION:=$(shell python -c 'print("$(VERSION_FULL)".split("-")[0])')
-VERSION_MAJ:=$(shell python -c 'print("$(VERSION)".split(".")[0])')
-VERSION_MIN:=$(shell python -c 'print("$(VERSION)".split(".")[1])')
-VERSION_PAT:=$(shell python -c 'print("$(VERSION)".split(".")[2])')
 
-VERSION_FLAGS= -DSOLO_VERSION_MAJ=$(VERSION_MAJ) -DSOLO_VERSION_MIN=$(VERSION_MIN) \
-	-DSOLO_VERSION_PATCH=$(VERSION_PAT) -DSOLO_VERSION=\"$(VERSION_FULL)\"
+CFLAGS = -O2 -fdata-sections -ffunction-sections -g
+ECC_CFLAGS = -O2 -fdata-sections -ffunction-sections -DuECC_PLATFORM=$(ecc_platform)
 
-CFLAGS = -O2 -fdata-sections -ffunction-sections $(VERSION_FLAGS) -g
-
-INCLUDES = -I./tinycbor/src -I./crypto/sha256 -I./crypto/micro-ecc/ -Icrypto/tiny-AES-c/ -I./fido2/ -I./pc -I./fido2/extensions
-INCLUDES += -I./crypto/cifra/src
+INCLUDES =  -I./fido2/ -I./pc -I../pc -I./tinycbor/src
 
 CFLAGS += $(INCLUDES)
-# for crypto/tiny-AES-c
-CFLAGS += -DAES256=1 -DAPP_CONFIG=\"app.h\" -DSOLO_EXPERIMENTAL=1
+CFLAGS += -DAES256=1  -DSOLO_EXPERIMENTAL=1 -DDEBUG_LEVEL=1
 
 name = main
 
@@ -53,7 +44,10 @@ tinycbor/Makefile crypto/tiny-AES-c/aes.c:
 cbor: $(LIBCBOR)
 
 $(LIBCBOR):
-	cd tinycbor/ && $(MAKE) clean && $(MAKE)  LDFLAGS='' -j8
+	cd tinycbor/ && $(MAKE)  LDFLAGS='' -j8
+
+$(LIBSOLO):
+	cd fido2/ && $(MAKE) CFLAGS="$(CFLAGS)" ECC_CFLAGS="$(ECC_CFLAGS)" APP_CONFIG=app.h -j8
 
 version:
 	@git describe
@@ -66,12 +60,9 @@ test: venv
 	$(MAKE) clean
 	$(MAKE) cppcheck
 
-$(name): $(obj) $(LIBCBOR)
+$(name): $(obj) $(LIBCBOR) $(LIBSOLO)
 	$(CC) $(LDFLAGS) -o $@ $(obj) $(LDFLAGS)
 
-crypto/micro-ecc/uECC.o: ./crypto/micro-ecc/uECC.c
-	$(CC) -c -o $@ $^ -O2 -fdata-sections -ffunction-sections -DuECC_PLATFORM=$(ecc_platform) -I./crypto/micro-ecc/
-
 venv:
 	python3 -m venv venv
 	venv/bin/pip -q install --upgrade pip
@@ -128,6 +119,7 @@ clean:
 	    	(cd `dirname $$f` ; git checkout -- .) ;\
 	    fi ;\
 	done
+	cd fido2 && $(MAKE) clean
 
 full-clean: clean
 	rm -rf venv
diff --git a/fido2/Makefile b/fido2/Makefile
index 076473c..e0df118 100644
--- a/fido2/Makefile
+++ b/fido2/Makefile
@@ -9,9 +9,9 @@ INC += -I../tinycbor/src
 INC += -I../crypto/sha256 -I../crypto/micro-ecc -I../crypto/tiny-AES-c
 INC += -I../crypto/cifra/src -I../crypto/cifra/src/ext
 
-CFLAGS += -DAPP_CONFIG=\"$(APP_CONFIG)\"
-CFLAGS += $(INC)
-CFLAGS += $(SOLO_VERSION_FLAGS)
+INT_CFLAGS = -DAPP_CONFIG=\"$(APP_CONFIG)\"
+INT_CFLAGS += $(INC)
+INT_CFLAGS += $(SOLO_VERSION_FLAGS)
 
 SRC = apdu.c util.c u2f.c test_power.c
 SRC += stubs.c log.c  ctaphid.c  ctap.c
@@ -34,10 +34,10 @@ libsolo.a: $(OBJ)
 	$(AR) cqs $@ $^
 
 %.o: %.c
-	$(CC) $^ $(CFLAGS) -c -o $@
+	$(CC) $^ $(INT_CFLAGS) $(CFLAGS) -c -o $@
 
 ../crypto/micro-ecc/uECC.o: ../crypto/micro-ecc/uECC.c
-	$(CC) $^ $(ECC_CFLAGS) -c -o $@
+	$(CC) $^ $(INT_CFLAGS) $(ECC_CFLAGS) -c -o $@
 
 clean:
 	rm $(OBJ) libsolo.a
diff --git a/fido2/example_app.h b/fido2/example_app.h
index b5e8bd2..252bf0b 100644
--- a/fido2/example_app.h
+++ b/fido2/example_app.h
@@ -13,8 +13,6 @@
 
 #define USING_PC
 
-#define DEBUG_LEVEL 1
-
 #define ENABLE_U2F
 #define ENABLE_U2F_EXTENSIONS
 //#define BRIDGE_TO_WALLET
diff --git a/fido2/log.h b/fido2/log.h
index 17a2d6b..8e33648 100644
--- a/fido2/log.h
+++ b/fido2/log.h
@@ -7,7 +7,10 @@
 #ifndef _LOG_H
 #define _LOG_H
 
+#ifdef APP_CONFIG
 #include APP_CONFIG
+#endif 
+
 #include <stdint.h>
 
 #ifndef DEBUG_LEVEL
@@ -50,7 +53,7 @@ typedef enum
     TAG_FILENO   = (1UL << 31)
 } LOG_TAG;
 
-#if DEBUG_LEVEL > 0
+#if defined(DEBUG_LEVEL) && DEBUG_LEVEL > 0
 
 void set_logging_mask(uint32_t mask);
 #define printf1(tag,fmt, ...) LOG(tag & ~(TAG_FILENO), NULL, 0, fmt, ##__VA_ARGS__)