# This makefile is for GNU Make 3.80 or above, and nowadays provided
# just for compatibility and preservation of traditions.
#
# Please use CMake in case of any difficulties or
# problems with this old-school's magic.
#
################################################################################
#
# Use `make options` to list the available libmdbx build options.
#
# 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 (see src/options.h) if you do.
#

SHELL   := env bash

# install sandbox
DESTDIR ?=

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

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

INSTALL ?= install
CC      ?= gcc
CFLAGS_EXTRA ?=
LD      ?= ld
MDBX_BUILD_OPTIONS ?=-DNDEBUG=1
MDBX_BUILD_TIMESTAMP ?=$(shell date +%Y-%m-%dT%H:%M:%S%z)
CFLAGS  ?= -std=gnu11 -O2 -g -Wall -Werror -Wextra -Wpedantic -ffunction-sections -fPIC -fvisibility=hidden -pthread -Wno-error=attributes $(CFLAGS_EXTRA)
# -Wno-tautological-compare
CXX     ?= g++
# Choosing C++ standard with deferred simple variable expansion trick
CXXSTD  ?= $(eval CXXSTD := $$(shell PROBE=$$$$([ -f mdbx.c++ ] && echo mdbx.c++ || echo src/mdbx.c++); for std in gnu++23 c++23 gnu++2b c++2b gnu++20 c++20 gnu++2a c++2a gnu++17 c++17 gnu++1z c++1z gnu++14 c++14 gnu++1y c++1y gnu+11 c++11 gnu++0x c++0x; do $(CXX) -std=$$$${std} -c $$$${PROBE} -o /dev/null 2>std-$$$${std}.err >/dev/null && echo "-std=$$$${std}" && exit; done))$(CXXSTD)
CXXFLAGS = $(CXXSTD) $(filter-out -std=gnu11,$(CFLAGS))

# TIP: Try append '--no-as-needed,-lrt' for ability to built with modern glibc, but then use with the old.
LIBS    ?= $(strip -lm $(shell uname | grep -qi SunOS && echo "-lkstat") $(shell uname | grep -qi -e Darwin -e OpenBSD || echo "-lrt") $(shell uname | grep -qi Windows && echo "-lntdll"))

LDFLAGS ?= $(strip $(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

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

UNAME      := $(shell uname -s 2>/dev/null || echo Unknown)
define uname2sosuffix
  case "$(UNAME)" in
    Darwin*|Mach*) echo dylib;;
    CYGWIN*|MINGW*|MSYS*|Windows*) echo dll;;
    *) echo so;;
  esac
endef
SO_SUFFIX  := $(shell $(uname2sosuffix))
HEADERS    := mdbx.h mdbx.h++
LIBRARIES  := libmdbx.a libmdbx.$(SO_SUFFIX)
TOOLS      := mdbx_stat mdbx_copy mdbx_dump mdbx_load mdbx_chk mdbx_drop
MANPAGES   := mdbx_stat.1 mdbx_copy.1 mdbx_dump.1 mdbx_load.1 mdbx_chk.1 mdbx_drop.1
TIP        := // TIP:

.PHONY: all help options lib tools clean install uninstall check_buildflags_tag
.PHONY: install-strip install-no-strip strip libmdbx mdbx show-options

ifeq ("$(origin V)", "command line")
  MDBX_BUILD_VERBOSE := $(V)
endif
ifndef MDBX_BUILD_VERBOSE
  MDBX_BUILD_VERBOSE := 0
endif

ifeq ($(MDBX_BUILD_VERBOSE),1)
  QUIET :=
  HUSH :=
  $(info $(TIP) Use `make V=0` for quiet.)
else
  QUIET := @
  HUSH := >/dev/null
  $(info $(TIP) Use `make V=1` for verbose.)
endif

all: show-options $(LIBRARIES) $(TOOLS)

help:
	@echo "  make all                 - build libraries and tools"
	@echo "  make help                - print this help"
	@echo "  make options             - list build options"
	@echo "  make lib                 - build libraries"
	@echo "  make tools               - built tools"
	@echo "  make clean               "
	@echo "  make install             "
	@echo "  make uninstall           "
	@echo ""
	@echo "  make strip               - strip debug symbols from binaries"
	@echo "  make install-no-strip    - install explicitly without strip"
	@echo "  make install-strip       - install explicitly with strip"
	@echo ""
	@echo "  make bench               - run ioarena-benchmark"
	@echo "  make bench-couple        - run ioarena-benchmark for mdbx and lmdb"
	@echo "  make bench-triplet       - run ioarena-benchmark for mdbx, lmdb, sqlite3"
	@echo "  make bench-quartet       - run ioarena-benchmark for mdbx, lmdb, rocksdb, wiredtiger"
	@echo "  make bench-clean         - remove temp database(s) after benchmark"

show-options:
	@echo "  MDBX_BUILD_OPTIONS   = $(MDBX_BUILD_OPTIONS)"
	@echo "  MDBX_BUILD_TIMESTAMP = $(MDBX_BUILD_TIMESTAMP)"
	@echo '$(TIP) Use `make options` to listing available build options.'
	@echo "  CC       =`which $(CC)` | `$(CC) --version | head -1`"
	@echo "  CFLAGS   =$(CFLAGS)"
	@echo "  CXXFLAGS =$(CXXFLAGS)"
	@echo "  LDFLAGS  =$(LDFLAGS) $(LIBS) $(EXE_LDFLAGS)"
	@echo '$(TIP) Use `make help` to listing available targets.'

options:
	@echo "  INSTALL      =$(INSTALL)"
	@echo "  DESTDIR      =$(DESTDIR)"
	@echo "  prefix       =$(prefix)"
	@echo "  mandir       =$(mandir)"
	@echo "  suffix       =$(suffix)"
	@echo ""
	@echo "  CC           =$(CC)"
	@echo "  CFLAGS_EXTRA =$(CFLAGS_EXTRA)"
	@echo "  CFLAGS       =$(CFLAGS)"
	@echo "  CXX          =$(CXX)"
	@echo "  CXXSTD       =$(CXXSTD)"
	@echo "  CXXFLAGS     =$(CXXFLAGS)"
	@echo ""
	@echo "  LD           =$(LD)"
	@echo "  LDFLAGS      =$(LDFLAGS)"
	@echo "  EXE_LDFLAGS  =$(EXE_LDFLAGS)"
	@echo "  LIBS         =$(LIBS)"
	@echo ""
	@echo "  MDBX_BUILD_OPTIONS   = $(MDBX_BUILD_OPTIONS)"
	@echo "  MDBX_BUILD_TIMESTAMP = $(MDBX_BUILD_TIMESTAMP)"
	@echo ""
	@echo "## Assortment items for MDBX_BUILD_OPTIONS:"
	@echo "##   Note that the defaults should already be correct for most platforms;"
	@echo "##   you should not need to change any of these. Read their descriptions"
	@echo "##   in README and source code (see mdbx.c) if you do."
	@grep -h '#ifndef MDBX_' mdbx.c | grep -v BUILD | uniq | sed 's/#ifndef /  /'

lib libmdbx mdbx: libmdbx.a libmdbx.$(SO_SUFFIX)

tools: $(TOOLS)

strip: all
	@echo '  STRIP libmdbx.$(SO_SUFFIX) $(TOOLS)'
	$(TRACE )strip libmdbx.$(SO_SUFFIX) $(TOOLS)

clean:
	@echo '  REMOVE ...'
	$(QUIET)rm -rf $(TOOLS) mdbx_test @* *.[ao] *.[ls]o *.$(SO_SUFFIX) *.dSYM *~ tmp.db/* \
		*.gcov *.log *.err src/*.o test/*.o mdbx_example dist \
		config.h src/config.h src/version.c *.tar* buildflags.tag

MDBX_BUILD_FLAGS =$(strip $(MDBX_BUILD_OPTIONS) $(CXXSTD) $(CFLAGS) $(LDFLAGS) $(LIBS))
check_buildflags_tag:
	$(QUIET)if [ "$(MDBX_BUILD_FLAGS)" != "$$(cat buildflags.tag 2>&1)" ]; then \
		echo -n "  CLEAN for build with specified flags..." && \
		$(MAKE) IOARENA=false CXXSTD= -s clean >/dev/null && echo " Ok" && \
		echo '$(MDBX_BUILD_FLAGS)' > buildflags.tag; \
	fi

buildflags.tag: check_buildflags_tag

libmdbx.a: mdbx-static.o mdbx++-static.o
	@echo '  AR $@'
	$(QUIET)$(AR) rcs $@ $? $(HUSH)

libmdbx.$(SO_SUFFIX): mdbx-dylib.o mdbx++-dylib.o
	@echo '  LD $@'
	$(QUIET)$(CXX) $(CXXFLAGS) $^ -pthread -shared $(LDFLAGS) $(LIBS) -o $@


################################################################################
# Amalgamated source code, i.e. distributed after `make dist`
MAN_SRCDIR := man1/

config.h: buildflags.tag mdbx.c $(lastword $(MAKEFILE_LIST))
	@echo '  MAKE $@'
	$(QUIET)(echo '#define MDBX_BUILD_TIMESTAMP "$(MDBX_BUILD_TIMESTAMP)"' \
	&& echo "#define MDBX_BUILD_FLAGS \"$$(cat buildflags.tag)\"" \
	&& echo '#define MDBX_BUILD_COMPILER "$(shell (LC_ALL=C $(CC) --version || echo 'Please use GCC or CLANG compatible compiler') | head -1)"' \
	&& echo '#define MDBX_BUILD_TARGET "$(shell set -o pipefail; (LC_ALL=C $(CC) -v 2>&1 | grep -i '^Target:' | cut -d ' ' -f 2- || (LC_ALL=C $(CC) --version | grep -qi e2k && echo E2K) || echo 'Please use GCC or CLANG compatible compiler') | head -1)"' \
	) >$@

mdbx-dylib.o: config.h mdbx.c mdbx.h $(lastword $(MAKEFILE_LIST))
	@echo '  CC $@'
	$(QUIET)$(CC) $(CFLAGS) $(MDBX_BUILD_OPTIONS) '-DMDBX_CONFIG_H="config.h"' -DLIBMDBX_EXPORTS=1 -c mdbx.c -o $@

mdbx-static.o: config.h mdbx.c mdbx.h $(lastword $(MAKEFILE_LIST))
	@echo '  CC $@'
	$(QUIET)$(CC) $(CFLAGS) $(MDBX_BUILD_OPTIONS) '-DMDBX_CONFIG_H="config.h"' -ULIBMDBX_EXPORTS -c mdbx.c -o $@

mdbx++-dylib.o: config.h mdbx.c++ mdbx.h mdbx.h++ $(lastword $(MAKEFILE_LIST))
	@echo '  CC $@'
	$(QUIET)$(CXX) $(CXXFLAGS) $(MDBX_BUILD_OPTIONS) '-DMDBX_CONFIG_H="config.h"' -DLIBMDBX_EXPORTS=1 -c mdbx.c++ -o $@

mdbx++-static.o: config.h mdbx.c++ mdbx.h mdbx.h++ $(lastword $(MAKEFILE_LIST))
	@echo '  CC $@'
	$(QUIET)$(CXX) $(CXXFLAGS) $(MDBX_BUILD_OPTIONS) '-DMDBX_CONFIG_H="config.h"' -ULIBMDBX_EXPORTS -c mdbx.c++ -o $@

mdbx_%:	mdbx_%.c libmdbx.a
	@echo '  CC+LD $@'
	$(QUIET)$(CC) $(CFLAGS) $(MDBX_BUILD_OPTIONS) '-DMDBX_CONFIG_H="config.h"' $^ $(EXE_LDFLAGS) $(LIBS) -o $@


install: $(LIBRARIES) $(TOOLS) $(HEADERS)
	@echo '  INSTALLING...'
	$(QUIET)mkdir -p $(DESTDIR)$(prefix)/bin$(suffix) && \
		$(INSTALL) -p $(EXE_INSTALL_FLAGS) $(TOOLS) $(DESTDIR)$(prefix)/bin$(suffix)/ && \
	mkdir -p $(DESTDIR)$(prefix)/lib$(suffix)/ && \
		$(INSTALL) -p $(EXE_INSTALL_FLAGS) $(filter-out libmdbx.a,$(LIBRARIES)) $(DESTDIR)$(prefix)/lib$(suffix)/ && \
	mkdir -p $(DESTDIR)$(prefix)/lib$(suffix)/ && \
		$(INSTALL) -p libmdbx.a $(DESTDIR)$(prefix)/lib$(suffix)/ && \
	mkdir -p $(DESTDIR)$(prefix)/include/ && \
		$(INSTALL) -p -m 444 $(HEADERS) $(DESTDIR)$(prefix)/include/ && \
	mkdir -p $(DESTDIR)$(mandir)/man1/ && \
		$(INSTALL) -p -m 444 $(addprefix $(MAN_SRCDIR), $(MANPAGES)) $(DESTDIR)$(mandir)/man1/

install-strip: EXE_INSTALL_FLAGS = -s
install-strip: install

install-no-strip: EXE_INSTALL_FLAGS =
install-no-strip: install

uninstall:
	@echo '  UNINSTALLING/REMOVE...'
	$(QUIET)rm -f $(addprefix $(DESTDIR)$(prefix)/bin$(suffix)/,$(TOOLS)) \
		$(addprefix $(DESTDIR)$(prefix)/lib$(suffix)/,$(LIBRARIES)) \
		$(addprefix $(DESTDIR)$(prefix)/include/,$(HEADERS)) \
		$(addprefix $(DESTDIR)$(mandir)/man1/,$(MANPAGES))

################################################################################
# Benchmarking by ioarena

ifeq ($(origin IOARENA),undefined)
IOARENA := $(shell \
  (test -x ../ioarena/@BUILD/src/ioarena && echo ../ioarena/@BUILD/src/ioarena) || \
  (test -x ../../@BUILD/src/ioarena && echo ../../@BUILD/src/ioarena) || \
  (test -x ../../src/ioarena && echo ../../src/ioarena) || which ioarena 2>&- || \
  (echo false && echo '$(TIP) Clone and build the https://github.com/pmwkaa/ioarena.git within a neighbouring directory for availability of benchmarking.' >&2))
endif
NN	?= 25000000
BENCH_CRUD_MODE ?= nosync

bench-clean:
	@echo '  REMOVE bench-*.txt _ioarena/*'
	$(QUIET)rm -rf bench-*.txt _ioarena/*

re-bench: bench-clean bench

ifeq ($(or $(IOARENA),false),false)
bench bench-quartet bench-triplet bench-couple:
	$(QUIET)echo 'The `ioarena` benchmark is required.' >&2 && \
	echo 'Please clone and build the https://github.com/pmwkaa/ioarena.git within a neighbouring `ioarena` directory.' >&2 && \
	false

else

.PHONY: bench bench-clean bench-couple re-bench bench-quartet bench-triplet

define bench-rule
bench-$(1)_$(2).txt: $(3) $(IOARENA) $(lastword $(MAKEFILE_LIST))
	@echo '  RUNNING ioarena for $1/$2...'
	$(QUIET)LD_LIBRARY_PATH="./:$$$${LD_LIBRARY_PATH}" \
		$(IOARENA) -D $(1) -B crud -m $(BENCH_CRUD_MODE) -n $(2) \
		| tee $$@ | grep throughput && \
	LD_LIBRARY_PATH="./:$$$${LD_LIBRARY_PATH}" \
		$(IOARENA) -D $(1) -B get,iterate -m $(BENCH_CRUD_MODE) -r 4 -n $(2) \
		| tee -a $$@ | 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)))
bench: bench-mdbx_$(NN).txt
bench-quartet: bench-mdbx_$(NN).txt bench-lmdb_$(NN).txt bench-rocksdb_$(NN).txt bench-wiredtiger_$(NN).txt
bench-triplet: bench-mdbx_$(NN).txt bench-lmdb_$(NN).txt bench-sqlite3_$(NN).txt
bench-couple: bench-mdbx_$(NN).txt bench-lmdb_$(NN).txt

# $(eval $(call bench-rule,debug,10))
# .PHONY: bench-debug
# bench-debug: bench-debug_10.txt

endif