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# The toolchain definitions
CC              = gcc
LEX             = flex
YACC            = bison
SPARSE          = sparse

V               = @             # Verbose build:  make V=1
C               = 0             # Sparsechecker build:  make C=1
Q               = $(V:1=)
QUIET_CC        = $(Q:@=@echo '     CC       '$@;)$(CC)
QUIET_DEPEND    = $(Q:@=@echo '     DEPEND   '$@;)$(CC)
QUIET_LEX       = $(Q:@=@echo '     LEX      '$@;)$(LEX)
QUIET_YACC      = $(Q:@=@echo '     YACC     '$@;)$(YACC)
ifeq ($(C),1)
QUIET_SPARSE    = $(Q:@=@echo '     SPARSE   '$@;)$(SPARSE)
else
QUIET_SPARSE    = @/bin/true
endif

PREFIX          ?= /usr/local
CFLAGS          ?= -O2 -fomit-frame-pointer -pipe
CFLAGS          += -std=gnu99 -D_GNU_SOURCE \
                   -Wall -Wextra -Wformat=2 -Wundef -Wno-unused-parameter \
                   -Wshadow -Wpointer-arith \
           -Wno-shift-negative-value \
           -Wignored-qualifiers \
           -Wno-sign-compare \
           -Wno-discarded-qualifiers

SPARSEFLAGS     = $(CFLAGS) -D__transparent_union__=__unused__ -D_STRING_ARCH_unaligned=1 \
                  -D__builtin_stpcpy=stpcpy
#LDFLAGS                += -lfl
LDFLAGS         += -ll

BIN             = b43-asm.bin
SRCS            = parser.c scanner.c main.c initvals.c util.c args.c

# YACC related CFLAGS
CFLAGS          += -DYYSTYPE="void *" -DYYERROR_VERBOSE -DYYDEBUG -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -Wno-unused

.SUFFIXES:
.PHONY: all install clean distclean
.DEFAULT_GOAL := all

DEPS = $(sort $(patsubst %.c,dep/%.d,$(1)))
OBJS = $(sort $(patsubst %.c,obj/%.o,$(1)))

# Generate dependencies
$(call DEPS,$(SRCS)): dep/%.d: %.c 
        @mkdir -p $(dir $@)
        $(QUIET_DEPEND) -o $@.tmp -MM -MG -MT "$@ $(patsubst dep/%.d,obj/%.o,$@)" $(CFLAGS) $< && mv -f $@.tmp $@

-include $(call DEPS,$(SRCS))

# Generate object files
$(call OBJS,$(SRCS)): obj/%.o:
        @mkdir -p $(dir $@)
        $(QUIET_SPARSE) $(SPARSEFLAGS) $<
        $(QUIET_CC) -o $@ -c $(CFLAGS) $<

all: $(BIN)

scanner.c: scanner.l parser.h main.h util.h
        $(QUIET_LEX) -o scanner.c --header-file=scanner.h scanner.l

scanner.h: scanner.c

scanner.o: scanner.c
        $(QUIET_CC) $(CFLAGS) -c -o scanner.o scanner.c

parser.c: parser.y main.h util.h
        $(QUIET_YACC) --defines -o parser.c parser.y

parser.h: parser.c

parser.o: parser.c
        $(QUIET_CC) $(CFLAGS) -c -o parser.o parser.c

$(BIN): $(call OBJS,$(SRCS))
        $(QUIET_CC) $(CFLAGS) -o $(BIN) $(call OBJS,$(SRCS)) $(LDFLAGS)

install: all
        install -m 755 $(BIN) $(PREFIX)/bin/
        cp b43-asm b43-asm.inst
        sed -i -e 's/installed=0/installed=1/' b43-asm.inst
        install -m 755 b43-asm.inst $(PREFIX)/bin/b43-asm
        rm -f b43-asm.inst

clean:
        -rm -Rf dep obj *~ *.orig *.rej scanner.c scanner.h parser.c parser.h

distclean: clean
        -rm -f $(BIN)