Allow specifying CPPFLAGS

The user may know better which CFLAGS/CPPFLAGS are appropriate.
Use flashrom_CFLAGS for flags which flashrom definitely needs to build.

Thanks to Stefan Tauner for pointing out the flaw in r1574.

Corresponding to flashrom svn r1575.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

Makefile

@@ -122,7 +122,7 @@ endif
 ifeq ($(TARGET_OS), MinGW)
 EXEC_SUFFIX := .exe
 # MinGW doesn't have the ffs() function, but we can use gcc's __builtin_ffs().
-CPPFLAGS += -Dffs=__builtin_ffs
+FLASHROM_CFLAGS += -Dffs=__builtin_ffs
 # libusb-win32/libftdi stuff is usually installed in /usr/local.
 CPPFLAGS += -I/usr/local/include
 LDFLAGS += -L/usr/local/lib
@@ -201,7 +201,7 @@ endif
 endif
 
 ifeq ($(TARGET_OS), libpayload)
-CPPFLAGS += -DSTANDALONE
+FLASHROM_CFLAGS += -DSTANDALONE
 ifeq ($(CONFIG_DUMMY), yes)
 UNSUPPORTED_FEATURES += CONFIG_DUMMY=yes
 else
@@ -603,7 +603,7 @@ libflashrom.a: $(LIBFLASHROM_OBJS)
 TAROPTIONS = $(shell LC_ALL=C tar --version|grep -q GNU && echo "--owner=root --group=root")
 
 %.o: %.c .features
-	$(CC) -MMD $(CFLAGS) $(CPPFLAGS) $(FEATURE_CFLAGS) $(SVNDEF) -o $@ -c $<
+	$(CC) -MMD $(CFLAGS) $(CPPFLAGS) $(FLASHROM_CFLAGS) $(FEATURE_CFLAGS) $(SVNDEF) -o $@ -c $<
 
 # Make sure to add all names of generated binaries here.
 # This includes all frontends and libflashrom.

util/ich_descriptors_tool/Makefile

@@ -30,10 +30,10 @@ CFLAGS += -Werror
 endif
 
 
-CPPFLAGS += -MMD -MP -MF $(DEPPATH)/$(@F).d
+FLASHROM_CFLAGS += -MMD -MP -MF $(DEPPATH)/$(@F).d
 # enables functions that populate the descriptor structs from plain binary dumps
-CPPFLAGS += -D ICH_DESCRIPTORS_FROM_DUMP
-CPPFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
+FLASHROM_CFLAGS += -D ICH_DESCRIPTORS_FROM_DUMP
+FLASHROM_CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
 
 OBJ = $(OBJATH)/$(SRC:%.c=%.o)
 
@@ -42,15 +42,15 @@ SHAREDOBJ = $(OBJATH)/$(notdir $(SHAREDSRC:%.c=%.o))
 all:$(PROGRAM)$(EXEC_SUFFIX)
 
 $(OBJ): $(OBJATH)/%.o : %.c
-	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -c $<
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(FLASHROM_CFLAGS) -o $@ -c $<
 
 # this enables us to share source files without simultaneously sharing .o files
 # with flashrom, which would lead to unexpected results (w/o running make clean)
 $(SHAREDOBJ): $(OBJATH)/%.o : $(SHAREDSRCDIR)/%.c
-	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -c $<
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(FLASHROM_CFLAGS) -o $@ -c $<
 
 $(PROGRAM)$(EXEC_SUFFIX): $(OBJ) $(SHAREDOBJ)
-	$(CC) -o $(PROGRAM)$(EXEC_SUFFIX) $(OBJ) $(SHAREDOBJ)
+	$(CC) $(LDFLAGS) -o $(PROGRAM)$(EXEC_SUFFIX) $(OBJ) $(SHAREDOBJ)
 
 clean:
 	rm -f $(PROGRAM) $(PROGRAM).exe