Detect out-of-date saved-structures.h

src/tlcl/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.
 
 INCLUDEDIRS = -I../../../../third_party/tpm-emulator/tpmd/unix
 LOCAL_CFLAGS = -g -Wall -Werror $(INCLUDEDIRS)
 CFLAGS += $(LOCAL_CFLAGS)
 # CFLAGS += -ansi -pedantic
 ifeq ($(USE_TPM_EMULATOR),1)
 CFLAGS += -DUSE_TPM_EMULATOR=1
 else
 CFLAGS += -DUSE_TPM_EMULATOR=0
 endif
 
 CC ?= cc
 HOSTCC = cc
 
-libtlcl.a: tlcl.o 
+libtlcl.a: tlcl.o
         ar rcs libtlcl.a tlcl.o
 
 tlcl.o: tlcl.c tlcl_internal.h tlcl.h structures.h
 
 structures.h: generator
         ./generator > structures.h
+        sed -e '0,/This file is automatically/d' < structures.h > x.tmp
+        sed -e '0,/This file is automatically/d' < saved-structures.h > y.tmp
+        cmp -s x.tmp y.tmp || \
+                (echo "Please update saved-structures.h" && false)
 
 generator: generator.c tlcl.h
         $(HOSTCC) $(LOCAL_CFLAGS) -I$(ROOT)/usr/include \
         -fpack-struct generator.c -o generator
 
 clean:
-        rm -f generator *.o *.a structures.h *~
+        rm -f generator *.o *.a structures.h x.tmp y.tmp *~