#################
# Configuration #
#################

# User variables
DEBUG  ?= 0
TEST   ?= 0

prefix ?= /usr/local
includedir ?= $(prefix)/include
bindir ?= $(prefix)/bin

# Wipe user flags if DEBUG is on
ifeq ($(DEBUG), 1)
CXXFLAGS = -O0 -g
endif

# Append mandatory flags
CXXFLAGS += -I. -std=c++14

# Set strict debugging flags for known compilers
ifeq ($(DEBUG), 1)

ifeq ($(findstring clang,$(CXX)),clang)
	CXXFLAGS += -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic
else ifeq ($(findstring g++,$(CXX)),g++)
	CXXFLAGS += -ftree-vrp -ftrapv  -Waddress -Wall -Warray-bounds=2 -Wbool-compare -Wc++14-compat -Wcast-align -Wcast-qual -Wchar-subscripts -Wchkp -Wclobbered -Wcomment -Wconditionally-supported -Wconversion -Wcoverage-mismatch -Wdate-time -Wdelete-incomplete -Wdisabled-optimization -Wdouble-promotion -Wduplicated-cond -Wempty-body -Wenum-compare -Werror=pedantic -Wextra -Wfloat-conversion -Wfloat-equal -Wformat -Wformat-nonliteral -Wformat-security -Wformat-signedness -Wformat-y2k -Wformat=2 -Wframe-address -Whsa -Wignored-attributes -Wignored-qualifiers -Winit-self -Winline -Winvalid-memory-model -Winvalid-pch -Wlogical-not-parentheses -Wlogical-op -Wmain -Wmaybe-uninitialized -Wmemset-transposed-args -Wmisleading-indentation -Wmissing-declarations -Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-include-dirs -Wno-aggressive-loop-optimizations -Wno-attributes -Wno-builtin-macro-redefined -Wno-cpp -Wno-deprecated -Wno-deprecated-declarations -Wno-div-by-zero -Wno-endif-labels -Wno-format-contains-nul -Wno-format-extra-args -Wno-free-nonheap-object -Wno-int-to-pointer-cast -Wno-invalid-offsetof -Wno-multichar -Wno-overflow -Wno-pedantic-ms-format -Wno-pragmas -Wno-return-local-addr -Wno-scalar-storage-order -Wno-undef -Wno-unused-result -Wnonnull -Wnonnull-compare -Wnormalized -Wnull-dereference -Wodr -Wopenmp-simd -Woverlength-strings -Wpacked -Wpacked-bitfield-compat -Wparentheses -Wpedantic -Wplacement-new=2 -Wpointer-arith -Wredundant-decls -Wreturn-type -Wsequence-point -Wshadow -Wshift-count-negative -Wshift-count-overflow -Wshift-negative-value -Wshift-overflow -Wshift-overflow=2 -Wsign-compare -Wsign-conversion -Wsizeof-array-argument -Wsizeof-pointer-memaccess -Wstack-protector -Wstrict-aliasing -Wstrict-overflow -Wsubobject-linkage -Wsuggest-attribute=const -Wsuggest-attribute=format -Wsuggest-attribute=noreturn -Wsuggest-attribute=pure -Wsuggest-final-methods -Wsuggest-final-types -Wsuggest-override -Wswitch -Wswitch-bool -Wswitch-default -Wswitch-enum -Wsync-nand -Wtautological-compare -Wtrampolines -Wtrigraphs -Wtype-limits -Wundef -Wuninitialized -Wunknown-pragmas -Wunsafe-loop-optimizations -Wunused -Wunused-but-set-parameter -Wunused-but-set-variable -Wunused-const-variable -Wunused-const-variable=2 -Wunused-function -Wunused-label -Wunused-local-typedefs -Wunused-parameter -Wunused-value -Wunused-variable -Wuseless-cast -Wvariadic-macros -Wvector-operation-performance -Wvla -Wvolatile-register-var -Wwrite-strings -Wzero-as-null-pointer-constant -fstrict-aliasing -fstrict-overflow -pedantic-errors
else
$(info warning: Unknown compiler, not setting strict debugging flags)
$(info )
endif

endif # DEBUG


###############
# Build Rules #
###############

HEADERS = $(wildcard chilbert/*.hpp) $(wildcard chilbert/*.ipp)
DETAIL_HEADERS = $(wildcard chilbert/detail/*.hpp)
TESTS = test/test_bitvec test/test_gray_code_rank test/test_hilbert
BENCHMARKS = test/bench_bitvec test/bench_hilbert
PROGS = bin/chilbert_obj bin/chilbert_svg

ALL_HEADERS = $(HEADERS) $(DETAIL_HEADERS)
PROG_NAMES = $(subst bin/,,$(PROGS))

all: $(PROGS)

tests: $(TESTS)

benchmarks: $(BENCHMARKS)

test/%: test/%.cpp $(ALL_HEADERS)
	$(CXX) $(CXXFLAGS) -o $@ $@.cpp

test/test_hilbert: test/test_hilbert.cpp $(ALL_HEADERS)
	$(CXX) $(CXXFLAGS) -lgmp -lgmpxx -o $@ $@.cpp

bin/%: bin/%.cpp $(ALL_HEADERS)
	$(CXX) $(CXXFLAGS) -o $@ $@.cpp


##################
# Forced Targets #
##################

FORCE:

clean:
	rm -f $(PROGS) $(TESTS) $(BENCHMARKS)

%.run: %
	$*

test: tests $(addsuffix .run, $(TESTS)) FORCE

bench: $(BENCHMARKS)
	mkdir -p benchmarks
	cd benchmarks && ../test/bench_bitvec
	cd benchmarks && ../test/bench_hilbert
	cd benchmarks && ./plot.py

install: FORCE
	install -d $(DESTDIR)$(includedir)/chilbert/
	install -d $(DESTDIR)$(includedir)/chilbert/detail/
	install -d $(DESTDIR)$(bindir)/

	install -m 755 -t $(DESTDIR)$(includedir)/chilbert/ $(HEADERS)
	install -m 755 -t $(DESTDIR)$(includedir)/chilbert/detail/ $(DETAIL_HEADERS)
	install -m 755 -t $(DESTDIR)$(bindir)/ $(PROGS)

uninstall: FORCE
	rm -f $(subst bin/,$(DESTDIR)$(bindir)/,$(PROGS))
	rm -f $(subst chilbert/,$(DESTDIR)$(includedir)/chilbert/,$(ALL_HEADERS))

	-rmdir $(DESTDIR)$(bindir)/
	-rmdir -p $(DESTDIR)$(includedir)/chilbert/detail/