Vboot reference: A basic user-land verified boot firmware signing and verification utility.

src/platform/vboot_reference/utils/Makefile

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 CC ?= gcc
+CXX ?= g++
 CFLAGS = -Wall -DNDEBUG
 INCLUDES ?= -I../include/
 TOP ?= ../
 
 LIBS = -lcrypto
 FIRMWARELIBS = $(TOP)/crypto/libcrypto.a $(TOP)/common/libcommon.a
 
 all: dumpRSAPublicKey verify_data signature_digest firmware_utility \
         file_keys.o firmware_image.o
 
 dumpRSAPublicKey: dumpRSAPublicKey.c
         $(CC) $(CFLAGS) $(LIBS) $< -o $@
 
 verify_data: verify_data.c file_keys.c
         $(CC) $(CFLAGS) $(INCLUDES) $^ -o $@ $(FIRMWARELIBS)
 
 signature_digest: signature_digest.c
         $(CC) $(CFLAGS) $(INCLUDES) $< -o $@ $(FIRMWARELIBS)
 
-firmware_utility: firmware_utility.c firmware_image.o file_keys.c
-        $(CC) $(CFLAGS) $(INCLUDES) $^ -o $@ $(FIRMWARELIBS)
+firmware_utility: firmware_utility.cc firmware_image.o file_keys.o
+        $(CXX) $(CFLAGS) $(INCLUDES) -ggdb $^ -o $@ $(FIRMWARELIBS)
 
 # Used by tests.
 file_keys.o: file_keys.c
         $(CC) $(CFLAGS) $(INCLUDES) -c $< -o $@
 
 firmware_image.o: firmware_image.c
         $(CC) $(CFLAGS) -ansi $(INCLUDES) -c $< -o $@
 
 clean:
         rm -f dumpRSAPublicKey verify_data signature_digest firmware_image.o \
-        file_keys.o
+        file_keys.o firmware_utility