CC = gcc
CFLAGS = -O2 -Wall

# MAC_BUILD - set this to "universal" to build a 2-way fat library 
MAC_BUILD = universal

# if ARCH set, disable universal build on the mac
ifdef ARCH
MAC_BUILD =
else
ARCH = $(shell uname -m)
endif

UNAME = $(shell uname -s)

ifeq ($(UNAME), Linux)
RANLIB=ranlib
CFLAGS+=-D_GNU_SOURCE -fPIC
endif

ifeq ($(UNAME), SunOS)
RANLIB=/bin/true
PATH +=:/usr/perl5/5.10.0/bin:/usr/perl5/5.12/bin
CFLAGS += -fPIC
ifeq ($(ARCH), i86pc)
ARCH = $(shell isainfo -k)
ifeq ($(ARCH), amd64)
ARCH = x86_64
else
ARCH = i386
endif
endif 
ifeq ($(ARCH), x86_64)
CFLAGS += -m64
else
CFLAGS += -m32
endif
endif

ifeq ($(UNAME), FreeBSD)
RANLIB=ranlib
CFLAGS += -Wno-error=unknown-pragmas -I/usr/src/sys/cddl/compat/opensolaris -I/usr/src/sys/cddl/contrib/opensolaris/uts/common
CFLAGS += -fPIC
ifeq ($(ARCH), i386)
CFLAGS += -m32
endif
ifeq ($(ARCH), amd64)
ARCH = x86_64
endif
endif

ifeq ($(UNAME), Darwin)
RANLIB=ranlib
ifeq ($(MAC_BUILD), universal)
CFLAGS += -arch i386 -arch x86_64
else
CFLAGS += -arch $(ARCH)
endif
endif

# main library build
objects = usdt.o usdt_dof_file.o usdt_tracepoints.o usdt_probe.o usdt_dof.o usdt_dof_sections.o
headers = usdt.h usdt_internal.h

.c.o: $(headers)

all: libusdt.a

libusdt.a: $(objects) $(headers)
	rm -f libusdt.a
	$(AR) cru libusdt.a $(objects) 
	$(RANLIB) libusdt.a

# Tracepoints build. 
#
# If on Darwin and building a universal library, manually assemble a
# two-way fat object file from both the 32 and 64 bit tracepoint asm
# files.
#
# Otherwise, just choose the appropriate asm file based on the build
# architecture.

ifeq ($(UNAME), Darwin)
ifeq ($(MAC_BUILD), universal)

usdt_tracepoints_i386.o: usdt_tracepoints_i386.s
	$(CC) -arch i386 -o usdt_tracepoints_i386.o -c usdt_tracepoints_i386.s

usdt_tracepoints_x86_64.o: usdt_tracepoints_x86_64.s
	$(CC) -arch x86_64 -o usdt_tracepoints_x86_64.o -c usdt_tracepoints_x86_64.s

usdt_tracepoints.o: usdt_tracepoints_i386.o usdt_tracepoints_x86_64.o
	lipo -create -output usdt_tracepoints.o usdt_tracepoints_i386.o \
	                                        usdt_tracepoints_x86_64.o

else # Darwin, not universal
usdt_tracepoints.o: usdt_tracepoints_$(ARCH).s
	$(CC) -arch $(ARCH) -o usdt_tracepoints.o -c usdt_tracepoints_$(ARCH).s
endif

else # not Darwin; FreeBSD and Illumos

ifeq ($(ARCH), x86_64)
usdt_tracepoints.o: usdt_tracepoints_x86_64.s
	$(CC) $(CFLAGS) -o usdt_tracepoints.o -c usdt_tracepoints_x86_64.s
endif
ifeq ($(ARCH), i386)
usdt_tracepoints.o: usdt_tracepoints_i386.s
	$(CC) $(CFLAGS) -o usdt_tracepoints.o -c usdt_tracepoints_i386.s
endif

endif

clean:
	rm -f *.gch
	rm -f *.o
	rm -f libusdt.a
	rm -f test_usdt
	rm -f test_usdt32
	rm -f test_usdt64
	rm -f test_mem_usage

.PHONY: clean test

# testing

test_mem_usage: libusdt.a test_mem_usage.o
	$(CC) $(CFLAGS) -o test_mem_usage test_mem_usage.o libusdt.a 

ifeq ($(UNAME), Darwin)
ifeq ($(MAC_BUILD), universal)
test_usdt64: libusdt.a test_usdt.o
	$(CC) -arch x86_64 -o test_usdt64 test_usdt.o libusdt.a
test_usdt32: libusdt.a test_usdt.o
	$(CC) -arch i386 -o test_usdt32 test_usdt.o libusdt.a
else
test_usdt: libusdt.a test_usdt.o
	$(CC) $(CFLAGS) -o test_usdt test_usdt.o libusdt.a 
endif
else
test_usdt: libusdt.a test_usdt.o
	$(CC) $(CFLAGS) -o test_usdt test_usdt.o libusdt.a 
endif

ifeq ($(UNAME), Darwin)
ifeq ($(MAC_BUILD), universal)
test: test_usdt32 test_usdt64
	sudo prove test.pl :: 64
	sudo prove test.pl :: 32
else
test: test_usdt
	sudo prove test.pl
endif
else
test: test_usdt
	sudo prove test.pl
endif