# This makefile is for GNU Make, and nowadays provided
# just for compatibility and preservation of traditions.
# Please use CMake in case of any difficulties or problems.
#
# Preprocessor macros (for MDBX_OPTIONS) of interest...
# Note that the defaults should already be correct for most platforms;
# you should not need to change any of these. Read their descriptions
# in README and source code if you do. There may be other macros of interest.

# install sandbox
SANDBOX	?=

# install prefixes (inside sandbox)
prefix	?= /usr/local
mandir	?= $(prefix)/man

# lib/bin suffix for multiarch/biarch, e.g. '.x86_64'
suffix	?=

CC	?= gcc
CXX	?= g++
LD	?= ld
MDBX_OPTIONS ?= -D_GNU_SOURCE=1 -DNDEBUG=1 -DLIBMDBX_EXPORTS=1
CFLAGS	?= -O2 -g3 -Wall -Werror -Wextra -ffunction-sections -fPIC -fvisibility=hidden -std=gnu11 -pthread

CXXFLAGS = -std=c++11 $(filter-out -std=gnu11,$(CFLAGS))
TESTDB	?= $(shell [ -d /dev/shm ] && echo /dev/shm || echo /tmp)/mdbx-test.db
TESTLOG ?= $(shell [ -d /dev/shm ] && echo /dev/shm || echo /tmp)/mdbx-test.log

# LY: '--no-as-needed,-lrt' for ability to built with modern glibc, but then run with the old
LDFLAGS	?= $(shell $(LD) --help 2>/dev/null | grep -q -- --gc-sections && echo '-Wl,--gc-sections,-z,relro,-O1')$(shell $(LD) --help 2>/dev/null | grep -q -- -dead_strip && echo '-Wl,-dead_strip')
EXE_LDFLAGS ?= -pthread

# LY: just for benchmarking
IOARENA ?= $(shell \
  (test -x ../ioarena/@BUILD/src/ioarena && echo ../ioarena/@BUILD/src/ioarena) || \
  (test -x ../../@BUILD/src/ioarena && echo ../../@BUILD/src/ioarena) || \
  (test -x ../../src/ioarena && echo ../../src/ioarena) || which ioarena)
NN	?= 25000000

########################################################################

ifdef MSVC
  UNAME := Windows
  TEST_OSAL := windows
  TEST_ITER := 42
else
  UNAME	:= $(shell uname -s 2>/dev/null || echo Unknown)
  define uname2osal
    case "$(UNAME)" in
      CYGWIN*|MINGW*|MSYS*|Windows*) echo windows;;
      *) echo unix;;
    esac
  endef
  define uname2titer
    case "$(UNAME)" in
      Darwin*|Mach*) echo 3;;
      *) echo 42;;
    esac
  endef
  define uname2suffix
    case "$(UNAME)" in
      Darwin*|Mach*) echo dylib;;
      CYGWIN*|MINGW*|MSYS*|Windows*) echo dll;;
      *) echo so;;
    esac
  endef
  TEST_OSAL := $(shell $(uname2osal))
  TEST_ITER := $(shell $(uname2titer))
  SO_SUFFIX := $(shell $(uname2suffix))
endif

HEADERS		:= mdbx.h
LIBRARIES	:= libmdbx.a libmdbx.$(SO_SUFFIX)
TOOLS		:= mdbx_stat mdbx_copy mdbx_dump mdbx_load mdbx_chk
MANPAGES	:= mdbx_stat.1 mdbx_copy.1 mdbx_dump.1 mdbx_load.1
SHELL		:= /bin/bash

ALLOY_DEPS      := $(wildcard src/elements/*)
TEST_SRC	:= test/osal-$(TEST_OSAL).cc $(filter-out $(wildcard test/osal-*.cc), $(wildcard test/*.cc))
TEST_INC	:= $(wildcard test/*.h)
TEST_OBJ	:= $(patsubst %.cc,%.o,$(TEST_SRC))

.PHONY: mdbx all install clean check coverage

all: $(LIBRARIES) $(TOOLS) mdbx_test example

mdbx: libmdbx.a libmdbx.$(SO_SUFFIX)

example: mdbx.h tutorial/sample-mdbx.c libmdbx.$(SO_SUFFIX)
	$(CC) $(CFLAGS) -I. tutorial/sample-mdbx.c ./libmdbx.$(SO_SUFFIX) -o example

tools: $(TOOLS)

install: $(LIBRARIES) $(TOOLS) $(HEADERS)
	mkdir -p $(SANDBOX)$(prefix)/bin$(suffix) \
		&& cp -t $(SANDBOX)$(prefix)/bin$(suffix) $(TOOLS) && \
	mkdir -p $(SANDBOX)$(prefix)/lib$(suffix) \
		&& cp -t $(SANDBOX)$(prefix)/lib$(suffix) $(LIBRARIES) && \
	mkdir -p $(SANDBOX)$(prefix)/include \
		&& cp -t $(SANDBOX)$(prefix)/include $(HEADERS) && \
	mkdir -p $(SANDBOX)$(mandir)/man1 \
		&& cp -t $(SANDBOX)$(mandir)/man1 $(MANPAGES)

clean:
	rm -rf $(TOOLS) mdbx_test @* *.[ao] *.[ls]o *~ tmp.db/* *.gcov *.log *.err src/*.o test/*.o

check:	all
	rm -f $(TESTDB) $(TESTLOG) && (set -o pipefail; ./mdbx_test --repeat=$(TEST_ITER) --pathname=$(TESTDB) --dont-cleanup-after basic | tee -a $(TESTLOG) | tail -n 42) \
	&& ./mdbx_chk -vvn $(TESTDB) && ./mdbx_chk -vvn $(TESTDB)-copy

check-singleprocess:	all
	rm -f $(TESTDB) $(TESTLOG) && (set -o pipefail; \
		./mdbx_test --repeat=4 --pathname=$(TESTDB) --dont-cleanup-after --hill && \
		./mdbx_test --repeat=2 --pathname=$(TESTDB) --dont-cleanup-before --dont-cleanup-after --copy \
		| tee -a $(TESTLOG) | tail -n 42) \
	&& ./mdbx_chk -vvn $(TESTDB) && ./mdbx_chk -vvn $(TESTDB)-copy

check-fault:	all
	rm -f $(TESTDB) $(TESTLOG) && (set -o pipefail; ./mdbx_test --pathname=$(TESTDB) --inject-writefault=42 --dump-config --dont-cleanup-after basic | tee -a $(TESTLOG) | tail -n 42) \
	; ./mdbx_chk -vvnw $(TESTDB) && ([ ! -e $(TESTDB)-copy ] || ./mdbx_chk -vvn $(TESTDB)-copy)

MDBX_VERSION_GIT = ${shell set -o pipefail; git describe --tags | sed -n 's|^v*\([0-9]\{1,\}\.[0-9]\{1,\}\.[0-9]\{1,\}\)\(.*\)|\1|p' || echo 'Please fetch tags and/or install latest git version'}
src/elements/version.c: src/elements/version.c.in $(lastword $(MAKEFILE_LIST)) .git/HEAD .git/index .git/refs/tags
	sed \
		-e "s|@MDBX_GIT_TIMESTAMP@|$(shell git show --no-patch --format=%cI HEAD || echo 'Please install latest get version')|" \
		-e "s|@MDBX_GIT_TREE@|$(shell git show --no-patch --format=%T HEAD || echo 'Please install latest get version')|" \
		-e "s|@MDBX_GIT_COMMIT@|$(shell git show --no-patch --format=%H HEAD || echo 'Please install latest get version')|" \
		-e "s|@MDBX_GIT_DESCRIBE@|$(shell git describe --tags --long --dirty=-dirty || echo 'Please fetch tags and/or install latest git version')|" \
		-e "s|\$${MDBX_VERSION_MAJOR}|$(shell echo '$(MDBX_VERSION_GIT)' | cut -d . -f 1)|" \
		-e "s|\$${MDBX_VERSION_MINOR}|$(shell echo '$(MDBX_VERSION_GIT)' | cut -d . -f 2)|" \
		-e "s|\$${MDBX_VERSION_RELEASE}|$(shell echo '$(MDBX_VERSION_GIT)' | cut -d . -f 3)|" \
		-e "s|\$${MDBX_VERSION_REVISION}|$(shell git rev-list --count --no-merges HEAD || echo 'Please fetch tags and/or install latest git version')|" \
	src/elements/version.c.in > $@ || rm -f $@

src/elements/config.h: src/elements/version.c $(lastword $(MAKEFILE_LIST))
	(echo '#define MDBX_BUILD_TIMESTAMP "$(shell date +%Y-%m-%dT%H:%M:%S%z)"' \
	&& echo '#define MDBX_BUILD_OPTIONS_STRING "$(MDBX_OPTIONS)"' \
	&& echo '#define MDBX_BUILD_FLAGS "$(CFLAGS) $(LDFLAGS)"' \
	&& echo '#define MDBX_BUILD_COMPILER "$(shell set -o pipefail; $(CC) --version | head -1 || echo 'Please use GCC or CLANG compatible compiler')"' \
	&& echo '#define MDBX_BUILD_TARGET "$(shell set -o pipefail; LC_ALL=C $(CC) -v 2>&1 | grep -i '^Target:' | cut -d ' ' -f 2- || echo 'Please use GCC or CLANG compatible compiler')"' \
	&& echo '#define MDBX_BUILD_SOURCERY $(shell set -o pipefail; ((openssl dgst -r -sha256 src/elements/version.c.in || sha256sum src/elements/version.c || shasum -a 256 src/elements/version.c) 2>/dev/null | cut -d ' ' -f 1 && echo -n `git describe --tags --long --dirty=-dirty`) | tr -c -s '[a-zA-Z0-9]' _ || echo 'Please install openssl or sha256sum or shasum')' \
	) > $@ || rm -f $@

libmdbx.o: src/elements/config.h src/elements/version.c src/alloy.c $(ALLOY_DEPS) $(lastword $(MAKEFILE_LIST))
	$(CC) $(CFLAGS) $(MDBX_OPTIONS) -c src/alloy.c -o $@

define test-rule
$(patsubst %.cc,%.o,$(1)): $(1) $(TEST_INC) mdbx.h $(lastword $(MAKEFILE_LIST))
	$(CXX) $(CXXFLAGS) $(MDBX_OPTIONS) -c $(1) -o $$@

endef
$(foreach file,$(TEST_SRC),$(eval $(call test-rule,$(file))))

libmdbx.a: libmdbx.o
	$(AR) rs $@ $?

libmdbx.$(SO_SUFFIX): libmdbx.o
	$(CC) $(CFLAGS) $^ -pthread -shared $(LDFLAGS) -o $@

mdbx_%:	src/tools/mdbx_%.c libmdbx.a
	$(CC) $(CFLAGS) $(MDBX_OPTIONS) $^ $(EXE_LDFLAGS) -o $@

mdbx_test: $(TEST_OBJ) libmdbx.$(SO_SUFFIX)
	$(CXX) $(CXXFLAGS) $(TEST_OBJ) -Wl,-rpath . -L . -l mdbx $(EXE_LDFLAGS) -o $@

###############################################################################

ifneq ($(wildcard $(IOARENA)),)

.PHONY: bench clean-bench re-bench

clean-bench:
	rm -rf bench-*.txt _ioarena/*

re-bench: clean-bench bench

define bench-rule
bench-$(1)_$(2).txt: $(3) $(IOARENA) Makefile
	LD_LIBRARY_PATH="./:$$$${LD_LIBRARY_PATH}" \
		$(IOARENA) -D $(1) -B crud -m nosync -n $(2) \
		| tee $$@ | grep throughput && \
	LD_LIBRARY_PATH="./:$$$${LD_LIBRARY_PATH}" \
		$(IOARENA) -D $(1) -B get,iterate -m sync -r 4 -n $(2) \
		| tee -a $$@ | grep throughput \
	|| mv -f $$@ $$@.error

endef

$(eval $(call bench-rule,mdbx,$(NN),libmdbx.$(SO_SUFFIX)))

$(eval $(call bench-rule,sophia,$(NN)))
$(eval $(call bench-rule,leveldb,$(NN)))
$(eval $(call bench-rule,rocksdb,$(NN)))
$(eval $(call bench-rule,wiredtiger,$(NN)))
$(eval $(call bench-rule,forestdb,$(NN)))
$(eval $(call bench-rule,lmdb,$(NN)))
$(eval $(call bench-rule,nessdb,$(NN)))
$(eval $(call bench-rule,sqlite3,$(NN)))
$(eval $(call bench-rule,ejdb,$(NN)))
$(eval $(call bench-rule,vedisdb,$(NN)))
$(eval $(call bench-rule,dummy,$(NN)))

$(eval $(call bench-rule,debug,10))

bench: bench-mdbx_$(NN).txt

.PHONY: bench-debug

bench-debug: bench-debug_10.txt

bench-quartet: bench-mdbx_$(NN).txt bench-lmdb_$(NN).txt bench-rocksdb_$(NN).txt bench-wiredtiger_$(NN).txt

endif

###############################################################################

ci-rule = ( CC=$$(which $1); if [ -n "$$CC" ]; then \
		echo -n "probe by $2 ($$(readlink -f $$(which $$CC))): " && \
		$(MAKE) clean >$1.log 2>$1.err && \
		$(MAKE) CC=$$(readlink -f $$CC) XCFLAGS="-UNDEBUG -DMDBX_DEBUG=2 -DLIBMDBX_EXPORTS=1" check 1>$1.log 2>$1.err && echo "OK" \
			|| ( echo "FAILED"; cat $1.err >&2; exit 1 ); \
	else echo "no $2 ($1) for probe"; fi; )
ci:
	@if [ "$$(readlink -f $$(which $(CC)))" != "$$(readlink -f $$(which gcc || echo /bin/false))" -a \
		"$$(readlink -f $$(which $(CC)))" != "$$(readlink -f $$(which clang || echo /bin/false))" -a \
		"$$(readlink -f $$(which $(CC)))" != "$$(readlink -f $$(which icc || echo /bin/false))" ]; then \
		$(call ci-rule,$(CC),default C compiler); \
	fi
	@$(call ci-rule,gcc,GCC)
	@$(call ci-rule,clang,clang LLVM)
	@$(call ci-rule,icc,Intel C)

###############################################################################

CROSS_LIST = mips-linux-gnu-gcc \
	powerpc64-linux-gnu-gcc powerpc-linux-gnu-gcc \
	arm-linux-gnueabihf-gcc aarch64-linux-gnu-gcc

# hppa-linux-gnu-gcc		- don't supported by current qemu release
# s390x-linux-gnu-gcc		- qemu troubles (hang/abort)
# sh4-linux-gnu-gcc		- qemu troubles (pread syscall, etc)
# mips64-linux-gnuabi64-gcc	- qemu troubles (pread syscall, etc)
# sparc64-linux-gnu-gcc		- qemu troubles (fcntl for F_SETLK/F_GETLK)
# alpha-linux-gnu-gcc		- qemu (or gcc) troubles (coredump)

CROSS_LIST_NOQEMU = hppa-linux-gnu-gcc s390x-linux-gnu-gcc \
	sh4-linux-gnu-gcc mips64-linux-gnuabi64-gcc \
	sparc64-linux-gnu-gcc alpha-linux-gnu-gcc

cross-gcc:
	@echo "CORRESPONDING CROSS-COMPILERs ARE REQUIRED."
	@echo "FOR INSTANCE: apt install g++-aarch64-linux-gnu g++-alpha-linux-gnu g++-arm-linux-gnueabihf g++-hppa-linux-gnu g++-mips-linux-gnu g++-mips64-linux-gnuabi64 g++-powerpc-linux-gnu g++-powerpc64-linux-gnu g++-s390x-linux-gnu g++-sh4-linux-gnu g++-sparc64-linux-gnu"
	@for CC in $(CROSS_LIST_NOQEMU) $(CROSS_LIST); do \
		echo "===================== $$CC"; \
		$(MAKE) clean && CC=$$CC CXX=$$(echo $$CC | sed 's/-gcc/-g++/') EXE_LDFLAGS=-static $(MAKE) all || exit $$?; \
	done

#
# Unfortunately qemu don't provide robust support for futexes.
# Therefore it is impossible to run full multi-process tests.
cross-qemu:
	@echo "CORRESPONDING CROSS-COMPILERs AND QEMUs ARE REQUIRED."
	@echo "FOR INSTANCE: "
	@echo "	1) apt install g++-aarch64-linux-gnu g++-alpha-linux-gnu g++-arm-linux-gnueabihf g++-hppa-linux-gnu g++-mips-linux-gnu g++-mips64-linux-gnuabi64 g++-powerpc-linux-gnu g++-powerpc64-linux-gnu g++-s390x-linux-gnu g++-sh4-linux-gnu g++-sparc64-linux-gnu"
	@echo "	2) apt install binfmt-support qemu-user-static qemu-user qemu-system-arm qemu-system-mips qemu-system-misc qemu-system-ppc qemu-system-sparc"
	@for CC in $(CROSS_LIST); do \
		echo "===================== $$CC + qemu"; \
		$(MAKE) clean && \
			CC=$$CC CXX=$$(echo $$CC | sed 's/-gcc/-g++/') EXE_LDFLAGS=-static XCFLAGS="-DMDBX_SAFE4QEMU $(XCFLAGS)" \
			$(MAKE) check-singleprocess || exit $$?; \
	done