makefile

#############################################################################
# This makefile was composed for facil.io
#
# Copyright (c) 2016-2019 Boaz Segev
# License MIT or ISC
#
# This makefile should be easilty portable on
# X-nix systems for different projects.
#
#############################################################################

#############################################################################
# Compliation Output Settings
#############################################################################

# binary name and location
ifndef NAME
NAME=fioapp
endif

# a temporary folder that will be cleared out and deleted between fresh builds
# All object files will be placed in this folder
TMP_ROOT=tmp

# destination folder for the final compiled output
ifndef DEST
DEST=$(TMP_ROOT)
endif

# output folder for `make libdump` - dumps all library files (not source files) in one place.
DUMP_LIB=libdump

# The library details for CMake incorporation. Can be safely removed.
CMAKE_LIBFILE_NAME=CMakeLists.txt

#############################################################################
# Source Code Folder Settings
#############################################################################

# The development, non-library .c file(s) (i.e., the one with `int main(void)`).
MAIN_ROOT=src
# Development subfolders under the main development root
MAIN_SUBFOLDERS=

#############################################################################
# Library Folder Settings
#############################################################################

# the .c and .cpp source files root folder
LIB_ROOT=lib

# publicly used subfolders in the lib root
LIB_PUBLIC_SUBFOLDERS=facil facil/tls facil/fiobj facil/cli facil/http facil/http/parsers facil/redis

# privately used subfolders in the lib root (this distinction is only relevant for CMake)
LIB_PRIVATE_SUBFOLDERS=

#############################################################################
# Compiler / Linker Settings
#############################################################################

# any libraries required (only names, ommit the "-l" at the begining)
LINKER_LIBS=pthread m
# optimization level.
OPTIMIZATION=-O2 -march=native
# Warnings... i.e. -Wpedantic -Weverything -Wno-format-pedantic
WARNINGS= -Wshadow -Wall -Wextra -Wno-missing-field-initializers -Wpedantic
# any extra include folders, space seperated list. (i.e. `pg_config --includedir`)
INCLUDE= ./
# any preprocessosr defined flags we want, space seperated list (i.e. DEBUG )
FLAGS:=

# c compiler
ifndef CC
	CC=gcc
endif
# c++ compiler
ifndef CPP
	CPP=g++
endif

# c standard
ifndef CSTD
	CSTD:=c11
endif
# c++ standard
ifndef CPPSTD
	CPPSTD:=gnu++11
endif

PKG_CONFIG ?= pkg-config

# for internal use - don't change
LINKER_LIBS_EXT:=

#############################################################################
# Debug Settings
#############################################################################

# add DEBUG flag if requested
ifdef DEBUG
  $(info * Detected DEBUG environment flag, enforcing debug mode compilation)
	FLAGS:=$(FLAGS) DEBUG
	# # comment the following line if you want to use a different address sanitizer or a profiling tool.
	OPTIMIZATION:=-O0 -march=native -fsanitize=address -fno-omit-frame-pointer
	# possibly useful:  -Wconversion -Wcomma -fsanitize=undefined -Wshadow
	# go crazy with clang: -Weverything -Wno-cast-qual -Wno-used-but-marked-unused -Wno-reserved-id-macro -Wno-padded -Wno-disabled-macro-expansion -Wno-documentation-unknown-command -Wno-bad-function-cast -Wno-missing-prototypes
else
	FLAGS:=$(FLAGS) NDEBUG NODEBUG
endif

#############################################################################
# facil.io compilation flag helpers
#############################################################################

# add FIO_PRINT_STATE flag if requested
ifdef FIO_PRINT
  $(warning FIO_PRINT_STATE is deprecated. FIO_PRINT support will be removed soon.)
	FLAGS:=$(FLAGS) FIO_PRINT_STATE=$(FIO_PRINT)
endif

# add FIO_PUBSUB_SUPPORT flag if requested
ifdef FIO_PUBSUB_SUPPORT
	FLAGS:=$(FLAGS) FIO_PUBSUB_SUPPORT=$(FIO_PUBSUB_SUPPORT)
endif

#############################################################################
# OS Specific Settings (debugger, disassembler, etc')
#############################################################################


ifneq ($(OS),Windows_NT)
	OS := $(shell uname)
else
	$(warning *** Windows systems might not work with this makefile / library.)
endif
ifeq ($(OS),Darwin) # Run MacOS commands
	# debugger
	DB=lldb
	# disassemble tool. Use stub to disable.
	# DISAMS=otool -dtVGX
	# documentation commands
	# DOCUMENTATION=cldoc generate $(INCLUDE_STR) -- --output ./html $(foreach dir, $(LIB_PUBLIC_SUBFOLDERS), $(wildcard $(addsuffix /, $(basename $(dir)))*.h*))
$(DEST)/libfacil.so: LDFLAGS += -dynamiclib -install_name $(realpath $(DEST))/libfacil.so
else
	# debugger
	DB=gdb
	# disassemble tool, leave undefined.
	# DISAMS=otool -tVX
	DOCUMENTATION=
endif

# GCC (at least) >= 7 triggers some bug when -fipa-icf is enabled
# (as in our default: -O2)
ifeq ($(shell $(CC) -v 2>&1 | grep -o "^gcc version"),gcc version)
	OPTIMIZATION += -fno-ipa-icf
endif

#############################################################################
# Automatic Setting Expansion
# (don't edit)
#############################################################################

BIN = $(DEST)/$(NAME)

LIBDIR_PUB = $(LIB_ROOT) $(foreach dir, $(LIB_PUBLIC_SUBFOLDERS), $(addsuffix /,$(basename $(LIB_ROOT)))$(dir))
LIBDIR_PRIV = $(foreach dir, $(LIB_PRIVATE_SUBFOLDERS), $(addsuffix /,$(basename $(LIB_ROOT)))$(dir))

LIBDIR = $(LIBDIR_PUB) $(LIBDIR_PRIV)
LIBSRC = $(foreach dir, $(LIBDIR), $(wildcard $(addsuffix /, $(basename $(dir)))*.c*))

MAINDIR = $(MAIN_ROOT) $(foreach main_root, $(MAIN_ROOT) , $(foreach dir, $(MAIN_SUBFOLDERS), $(addsuffix /,$(basename $(main_root)))$(dir)))
MAINSRC = $(foreach dir, $(MAINDIR), $(wildcard $(addsuffix /, $(basename $(dir)))*.c*))

FOLDERS = $(LIBDIR) $(MAINDIR)
SOURCES = $(LIBSRC) $(MAINSRC)

BUILDTREE =$(foreach dir, $(FOLDERS), $(addsuffix /, $(basename $(TMP_ROOT)))$(basename $(dir)))

CCL = $(CC)

INCLUDE_STR = $(foreach dir,$(INCLUDE),$(addprefix -I, $(dir))) $(foreach dir,$(FOLDERS),$(addprefix -I, $(dir)))

MAIN_OBJS = $(foreach source, $(MAINSRC), $(addprefix $(TMP_ROOT)/, $(addsuffix .o, $(basename $(source)))))
LIB_OBJS = $(foreach source, $(LIBSRC), $(addprefix $(TMP_ROOT)/, $(addsuffix .o, $(basename $(source)))))

OBJS_DEPENDENCY:=$(LIB_OBJS:.o=.d) $(MAIN_OBJS:.o=.d)

#############################################################################
# TRY_COMPILE and TRY_COMPILE_AND_RUN functions
#
# Call using $(call TRY_COMPILE, code, compiler_flags)
#
# Returns shell code as string: "0" (success) or non-0 (failure)
#
# TRY_COMPILE_AND_RUN returns the program's shell code as string.
#############################################################################

TRY_COMPILE=$(shell printf $(1) | $(CC) $(INCLUDE_STR) $(LDFLAGS) $(2) -xc -o /dev/null - >> /dev/null 2> /dev/null ; echo $$? 2> /dev/null)
TRY_COMPILE_AND_RUN=$(shell printf $(1) | $(CC) $(2) -xc -o ./___fio_tmp_test_ - 2> /dev/null ; ./___fio_tmp_test_ >> /dev/null 2> /dev/null; echo $$?; rm ./___fio_tmp_test_ 2> /dev/null)
EMPTY:=

#############################################################################
# kqueue / epoll / poll Selection / Detection
# (no need to edit)
#############################################################################

FIO_POLL_TEST_KQUEUE := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <sys/event.h>\\n\
int main(void) {\\n\
	int fd = kqueue();\\n\
}\\n\
"

FIO_POLL_TEST_EPOLL := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <stdio.h>\\n\
\#include <sys/types.h>\\n\
\#include <sys/stat.h>\\n\
\#include <fcntl.h>\\n\
\#include <sys/epoll.h>\\n\
int main(void) {\\n\
	int fd = epoll_create1(EPOLL_CLOEXEC);\\n\
}\\n\
"

FIO_POLL_TEST_POLL := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <poll.h>\\n\
int main(void) {\\n\
  struct pollfd plist[18];\\n\
  memset(plist, 0, sizeof(plist[0]) * 18);\\n\
  poll(plist, 1, 1);\\n\
}\\n\
"

# Test for manual selection and then TRY_COMPILE with each polling engine
ifdef FIO_POLL
  $(info * Skipping polling tests, enforcing manual selection of: poll)
	FLAGS:=$(FLAGS) FIO_ENGINE_POLL
else ifdef FIO_FORCE_POLL
  $(info * Skipping polling tests, enforcing manual selection of: poll)
	FLAGS:=$(FLAGS) FIO_ENGINE_POLL
else ifdef FIO_FORCE_EPOLL
  $(info * Skipping polling tests, enforcing manual selection of: epoll)
	FLAGS:=$(FLAGS) FIO_ENGINE_EPOLL
else ifdef FIO_FORCE_KQUEUE
  $(info * Skipping polling tests, enforcing manual selection of: kqueue)
	FLAGS:=$(FLAGS) FIO_ENGINE_KQUEUE
else ifeq ($(call TRY_COMPILE, $(FIO_POLL_TEST_EPOLL), $(EMPTY)), 0)
  $(info * Detected `epoll`)
	FLAGS:=$(FLAGS) FIO_ENGINE_EPOLL
else ifeq ($(call TRY_COMPILE, $(FIO_POLL_TEST_KQUEUE), $(EMPTY)), 0)
  $(info * Detected `kqueue`)
	FLAGS:=$(FLAGS) FIO_ENGINE_KQUEUE
else ifeq ($(call TRY_COMPILE, $(FIO_POLL_TEST_POLL), $(EMPTY)), 0)
  $(info * Detected `poll` - this is suboptimal fallback!)
	FLAGS:=$(FLAGS) FIO_ENGINE_POLL
else
	$(warning No supported polling engine! won't be able to compile facil.io)
endif

#############################################################################
# Detecting The `sendfile` System Call
# (no need to edit)
#############################################################################

# Linux variation
FIO_SENDFILE_TEST_LINUX := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <stdio.h>\\n\
\#include <sys/sendfile.h>\\n\
int main(void) {\\n\
	off_t offset = 0;\\n\
	ssize_t result = sendfile(2, 1, (off_t *)&offset, 300);\\n\
}\\n\
"

# BSD variation
FIO_SENDFILE_TEST_BSD := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <stdio.h>\\n\
\#include <sys/types.h>\\n\
\#include <sys/socket.h>\\n\
\#include <sys/uio.h>\\n\
int main(void) {\\n\
	off_t sent = 0;\\n\
	off_t offset = 0;\\n\
	ssize_t result = sendfile(2, 1, offset, (size_t)sent, NULL, &sent, 0);\\n\
}\\n\
"

# Apple variation
FIO_SENDFILE_TEST_APPLE := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <stdio.h>\\n\
\#include <sys/types.h>\\n\
\#include <sys/socket.h>\\n\
\#include <sys/uio.h>\\n\
int main(void) {\\n\
	off_t sent = 0;\\n\
	off_t offset = 0;\\n\
	ssize_t result = sendfile(2, 1, offset, &sent, NULL, 0);\\n\
}\\n\
"

ifeq ($(call TRY_COMPILE, $(FIO_SENDFILE_TEST_LINUX), $(EMPTY)), 0)
  $(info * Detected `sendfile` (Linux))
	FLAGS:=$(FLAGS) USE_SENDFILE_LINUX
else ifeq ($(call TRY_COMPILE, $(FIO_SENDFILE_TEST_BSD), $(EMPTY)), 0)
  $(info * Detected `sendfile` (BSD))
	FLAGS:=$(FLAGS) USE_SENDFILE_BSD
else ifeq ($(call TRY_COMPILE, $(FIO_SENDFILE_TEST_APPLE), $(EMPTY)), 0)
  $(info * Detected `sendfile` (Apple))
	FLAGS:=$(FLAGS) USE_SENDFILE_APPLE
else
  $(info * No `sendfile` support detected.)
	FLAGS:=$(FLAGS) USE_SENDFILE=0
endif

#############################################################################
# Detecting 'struct tm' fields
# (no need to edit)
#############################################################################

FIO_TEST_STRUCT_TM_TM_ZONE := "\\n\
\#define _GNU_SOURCE\\n\
\#include <time.h>\\n\
int main(void) {\\n\
	struct tm tm;\\n\
	tm.tm_zone = \"UTC\";\\n\
	return 0;\\n\
}\\n\
"

ifeq ($(call TRY_COMPILE, $(FIO_TEST_STRUCT_TM_TM_ZONE), $(EMPTY)), 0)
  $(info * Detected 'tm_zone' field in 'struct tm')
	FLAGS:=$(FLAGS) HAVE_TM_TM_ZONE=1
endif

#############################################################################
# Detecting SystemV socket libraries
# (no need to edit)
#############################################################################

FIO_TEST_SOCKET_AND_NETWORK_SERVICE := "\\n\
\#include <sys/types.h>\\n\
\#include <sys/socket.h>\\n\
\#include <netinet/in.h>\\n\
\#include <arpa/inet.h>\\n\
int main(void) {\\n\
	struct sockaddr_in addr = { .sin_port = 0 };\\n\
	int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);\\n\
	if(fd == -1) return 1;\\n\
	if(inet_pton(AF_INET, \"127.0.0.1\", &addr.sin_addr) < 1) return 1;\\n\
	return connect(fd, (struct sockaddr *)&addr, sizeof addr) < 0 ? 1 : 0;\\n\
}\\n\
"

ifeq ($(call TRY_COMPILE, $(FIO_TEST_SOCKET_AND_NETWORK_SERVICE), $(EMPTY)), 0)
  $(info * Detected socket API without additional libraries)
else ifeq ($(call TRY_COMPILE, $(FIO_TEST_SOCKET_AND_NETWORK_SERVICE), "-lsocket" "-lnsl"), 0)
  $(info * Detected socket API from libsocket and libnsl)
	LINKER_LIBS_EXT:=$(LINKER_LIBS_EXT) socket nsl
else
  $(error No socket API available)
endif

#############################################################################
# SSL/ TLS Library Detection
# (no need to edit)
#############################################################################

# BearSSL requirement C application code
# (source code variation)
FIO_TLS_TEST_BEARSSL_SOURCE := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <bearssl.h>\\n\
int main(void) {\\n\
}\\n\
"

# BearSSL requirement C application code
# (linked library variation)
FIO_TLS_TEST_BEARSSL_EXT := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <bearssl.h>\\n\
int main(void) {\\n\
}\\n\
"

# OpenSSL requirement C application code
FIO_TLS_TEST_OPENSSL := "\\n\
\#define _GNU_SOURCE\\n\
\#include <stdlib.h>\\n\
\#include <openssl/bio.h> \\n\
\#include <openssl/err.h> \\n\
\#include <openssl/ssl.h> \\n\
\#if OPENSSL_VERSION_NUMBER < 0x10100000L \\n\
\#error \"OpenSSL version too small\" \\n\
\#endif \\n\
int main(void) { \\n\
  SSL_library_init(); \\n\
  SSL_CTX *ctx = SSL_CTX_new(TLS_method()); \\n\
  SSL *ssl = SSL_new(ctx); \\n\
  BIO *bio = BIO_new_socket(3, 0); \\n\
  BIO_up_ref(bio); \\n\
  SSL_set0_rbio(ssl, bio); \\n\
  SSL_set0_wbio(ssl, bio); \\n\
}\\n\
"


# automatic library adjustments for possible BearSSL library
LIB_PRIVATE_SUBFOLDERS:=$(LIB_PRIVATE_SUBFOLDERS) $(if $(wildcard lib/bearssl),bearssl)

ifeq ($(shell $(PKG_CONFIG) -- openssl >/dev/null 2>&1; echo $$?), 0)
	OPENSSL_CFLAGS = $(shell $(PKG_CONFIG) --cflags openssl)
	OPENSSL_LDFLAGS = $(shell $(PKG_CONFIG) --libs openssl)
	OPENSSL_LIBS =
endif

OPENSSL_LDFLAGS ?= "-lssl" "-lcrypto"

# add BearSSL/OpenSSL library flags (exclusive)
ifdef FIO_NO_TLS
else ifeq ($(call TRY_COMPILE, $(FIO_TLS_TEST_BEARSSL_SOURCE), $(EMPTY)), 0)
  $(info * Detected the BearSSL source code library, setting HAVE_BEARSSL)
	# TODO: when BearSSL support arrived, set the FIO_TLS_FOUND flag as well
	FLAGS:=$(FLAGS) HAVE_BEARSSL
else ifeq ($(call TRY_COMPILE, $(FIO_TLS_TEST_BEARSSL_EXT), "-lbearssl"), 0)
  $(info * Detected the BearSSL library, setting HAVE_BEARSSL)
	# TODO: when BearSSL support arrived, set the FIO_TLS_FOUND flag as well
	FLAGS:=$(FLAGS) HAVE_BEARSSL
	LINKER_LIBS_EXT:=$(LINKER_LIBS_EXT) bearssl
else ifeq ($(call TRY_COMPILE, $(FIO_TLS_TEST_OPENSSL), $(OPENSSL_CFLAGS) $(OPENSSL_LDFLAGS)), 0)
  $(info * Detected the OpenSSL library, setting HAVE_OPENSSL)
	FLAGS:=$(FLAGS) HAVE_OPENSSL FIO_TLS_FOUND
	LINKER_LIBS_EXT:=$(LINKER_LIBS_EXT) $(OPENSSL_LIBS)
	LDFLAGS += $(OPENSSL_LDFLAGS)
	CFLAGS += $(OPENSSL_CFLAGS)
	PKGC_REQ_OPENSSL = openssl >= 1.1, openssl < 1.2
	PKGC_REQ += $$(PKGC_REQ_OPENSSL)
else
  $(info * No compatible SSL/TLS library detected.)
endif

# S2N TLS/SSL library: https://github.com/awslabs/s2n
ifeq ($(call TRY_COMPILE, "\#include <s2n.h>\\n int main(void) {}", "-ls2n") , 0)
  $(info * Detected the s2n library, setting HAVE_S2N)
	# TODO: when S2N support arrived, set the FIO_TLS_FOUND flag as well
	FLAGS:=$(FLAGS) HAVE_S2N
	LINKER_LIBS_EXT:=$(LINKER_LIBS_EXT) s2n
endif

#############################################################################
# ZLib Library Detection
# (no need to edit)
#############################################################################

ifeq ($(call TRY_COMPILE, "\#include <zlib.h>\\nint main(void) {}", "-lz") , 0)
  $(info * Detected the zlib library, setting HAVE_ZLIB)
	FLAGS:=$(FLAGS) HAVE_ZLIB
	LINKER_LIBS_EXT:=$(LINKER_LIBS_EXT) z
	PKGC_REQ_ZLIB = zlib
	PKGC_REQ += $$(PKGC_REQ_ZLIB)
endif

#############################################################################
# PostgreSQL Library Detection
# (no need to edit)
#############################################################################

ifeq ($(call TRY_COMPILE, "\#include <libpq-fe.h>\\n int main(void) {}", "-lpg") , 0)
  $(info * Detected the PostgreSQL library, setting HAVE_POSTGRESQL)
	FLAGS:=$(FLAGS) HAVE_POSTGRESQL
	LINKER_LIBS_EXT:=$(LINKER_LIBS_EXT) pg
else ifeq ($(call TRY_COMPILE, "\#include </usr/include/postgresql/libpq-fe.h>\\nint main(void) {}", "-lpg") , 0)
  $(info * Detected the PostgreSQL library, setting HAVE_POSTGRESQL)
	FLAGS:=$(FLAGS) HAVE_POSTGRESQL
	INCLUDE_STR:=$(INCLUDE_STR) -I/usr/include/postgresql
	LINKER_LIBS_EXT:=$(LINKER_LIBS_EXT) pg
endif

#############################################################################
# Endian  Detection
# (no need to edit)
#############################################################################

ifeq ($(call TRY_COMPILE_AND_RUN, "int main(void) {int i = 1; return (int)(i & ((unsigned char *)&i)[sizeof(i)-1]);}\n",$(EMPTY)), 1)
  $(info * Detected Big Endian byte order.)
	FLAGS:=$(FLAGS) __BIG_ENDIAN__
else ifeq ($(call TRY_COMPILE_AND_RUN, "int main(void) {int i = 1; return (int)(i & ((unsigned char *)&i)[0]);}\n",$(EMPTY)), 1)
  $(info * Detected Little Endian byte order.)
	FLAGS:=$(FLAGS) __BIG_ENDIAN__=0
else
  $(info * Byte ordering (endianness) detection failed)
endif

#############################################################################
# Updated flags and final values
# (don't edit)
#############################################################################

FLAGS_STR = $(foreach flag,$(FLAGS),$(addprefix -D, $(flag)))
CFLAGS:= $(CFLAGS) -g -std=$(CSTD) -fpic $(FLAGS_STR) $(WARNINGS) $(OPTIMIZATION) $(INCLUDE_STR)
CPPFLAGS:= $(CPPFLAGS) -std=$(CPPSTD) -fpic  $(FLAGS_STR) $(WARNINGS) $(OPTIMIZATION) $(INCLUDE_STR)
LINKER_FLAGS= $(LDFLAGS) $(foreach lib,$(LINKER_LIBS),$(addprefix -l,$(lib))) $(foreach lib,$(LINKER_LIBS_EXT),$(addprefix -l,$(lib)))
CFLAGS_DEPENDENCY=-MT $@ -MMD -MP


# Build a "Requires:" string for the pkgconfig/facil.pc file
# unfortunately, leading or trailing commas are interpreted as
# "empty package name" by pkg-config, therefore we work around this by using
# $(strip ..).
# The following 2 lines are from the manual of GNU make
nullstring :=
space := $(nullstring) # end of line
comma := ,

$(eval PKGC_REQ_EVAL := $(subst $(space),$(comma) ,$(strip $(PKGC_REQ))))

#############################################################################
# Tasks - Building
#############################################################################

$(NAME): build

build: | create_tree build_objects

build_objects: $(LIB_OBJS) $(MAIN_OBJS)
	@$(CCL) -o $(BIN) $^ $(OPTIMIZATION) $(LINKER_FLAGS)
	@$(DOCUMENTATION)

lib: | create_tree lib_build

$(DEST)/pkgconfig/facil.pc: makefile | libdump
	@mkdir -p $(DEST)/pkgconfig && \
	printf "\
Name: facil.io\\n\
Description: facil.io\\n\
Cflags: -I%s\\n\
Libs: -L%s -lfacil\\n\
Version: %s\\n\
Requires.private: %s\\n\
" $(realpath $(DEST)/../libdump/include) $(realpath $(DEST)) 0.7.x "$(PKGC_REQ_EVAL)" > $@

$(DEST)/libfacil.so: $(LIB_OBJS) | $(DEST)/pkgconfig/facil.pc
	@$(CCL) -shared -o $@ $^ $(OPTIMIZATION) $(LINKER_FLAGS)

lib_build: $(DEST)/libfacil.so
	@$(DOCUMENTATION)


%.o : %.c

#### no disassembler (normal / expected state)
ifndef DISAMS
$(TMP_ROOT)/%.o: %.c $(TMP_ROOT)/%.d
	@$(CC) -c $< -o $@ $(CFLAGS_DEPENDENCY) $(CFLAGS)

$(TMP_ROOT)/%.o: %.cpp $(TMP_ROOT)/%.d
	@$(CC) -c $< -o $@ $(CFLAGS_DEPENDENCY) $(CPPFLAGS)
	$(eval CCL = $(CPP))

$(TMP_ROOT)/%.o: %.c++ $(TMP_ROOT)/%.d
	@$(CC) -c $< -o $@ $(CFLAGS_DEPENDENCY) $(CPPFLAGS)
	$(eval CCL = $(CPP))

#### add diassembling stage (testing / slower)
else
$(TMP_ROOT)/%.o: %.c $(TMP_ROOT)/%.d
	@$(CC) -c $< -o $@ $(CFLAGS_DEPENDENCY) $(CFLAGS)
	@$(DISAMS) $@ > $@.s

$(TMP_ROOT)/%.o: %.cpp $(TMP_ROOT)/%.d
	@$(CPP) -o $@ -c $< $(CFLAGS_DEPENDENCY) $(CPPFLAGS)
	$(eval CCL = $(CPP))
	@$(DISAMS) $@ > $@.s

$(TMP_ROOT)/%.o: %.c++ $(TMP_ROOT)/%.d
	@$(CPP) -o $@ -c $< $(CFLAGS_DEPENDENCY) $(CPPFLAGS)
	$(eval CCL = $(CPP))
	@$(DISAMS) $@ > $@.s
endif

$(TMP_ROOT)/%.d: ;

-include $(OBJS_DEPENDENCY)

#############################################################################
# Tasks - Testing
#############################################################################


.PHONY : test
test: | clean
	@DEBUG=1 $(MAKE) test_build_and_run
	-@rm $(BIN) 2> /dev/null
	-@rm -R $(TMP_ROOT) 2> /dev/null

.PHONY : test/speed
test/speed: | test_add_speed_flags $(LIB_OBJS)
	@$(CC) -c ./tests/speeds.c -o $(TMP_ROOT)/speeds.o $(CFLAGS_DEPENDENCY) $(CFLAGS)
	@$(CCL) -o $(BIN) $(LIB_OBJS) $(TMP_ROOT)/speeds.o $(OPTIMIZATION) $(LINKER_FLAGS)
	@$(BIN)

.PHONY : test/optimized
test/optimized: | clean test_add_speed_flags create_tree $(LIB_OBJS)
	@$(CC) -c ./tests/tests.c -o $(TMP_ROOT)/tests.o $(CFLAGS_DEPENDENCY) $(CFLAGS)
	@$(CCL) -o $(BIN) $(LIB_OBJS) $(TMP_ROOT)/tests.o $(OPTIMIZATION) $(LINKER_FLAGS)
	@$(BIN)
	-@rm $(BIN) 2> /dev/null
	-@rm -R $(TMP_ROOT) 2> /dev/null

.PHONY : test/ci
test/ci:| clean
	@DEBUG=1 $(MAKE) test_build_and_run

.PHONY : test/c99
test/c99:| clean
	@CSTD=c99 DEBUG=1 $(MAKE) test_build_and_run

.PHONY : test/poll
test/poll:| clean
	@CSTD=c99 DEBUG=1 FIO_FORCE_POLL=1 $(MAKE) test_build_and_run

.PHONY : test_build_and_run
test_build_and_run: | create_tree test_add_flags test/build
	@$(BIN)

.PHONY : test_add_flags
test_add_flags:
	$(eval CFLAGS:=-coverage $(CFLAGS) -DDEBUG=1 -Werror)
	$(eval LINKER_FLAGS:=-coverage -DDEBUG=1 $(LINKER_FLAGS))

.PHONY : test_add_speed_flags
test_add_speed_flags:
	$(eval CFLAGS:=$(CFLAGS) -DDEBUG=1)
	$(eval LINKER_FLAGS:=-DDEBUG=1 $(LINKER_FLAGS))


.PHONY : test/build
test/build: $(LIB_OBJS)
	@$(CC) -c ./tests/tests.c -o $(TMP_ROOT)/tests.o $(CFLAGS_DEPENDENCY) $(CFLAGS)
	@$(CCL) -o $(BIN) $(LIB_OBJS) $(TMP_ROOT)/tests.o $(OPTIMIZATION) $(LINKER_FLAGS)

.PHONY : clean
clean:
	-@rm -f $(BIN) 2> /dev/null || echo "" >> /dev/null
	-@rm -R -f $(TMP_ROOT) 2> /dev/null || echo "" >> /dev/null
	-@mkdir -p $(BUILDTREE)

.PHONY : run
run: | build
	@$(BIN)

.PHONY : db
db: | clean
	DEBUG=1 $(MAKE) build
	$(DB) $(BIN)


.PHONY : create_tree
create_tree:
	-@mkdir -p $(BUILDTREE) 2> /dev/null


#############################################################################
# Tasks - Installers
#############################################################################

.PHONY : install/bearssl
install/bearssl: | remove/bearssl add/bearssl ;

.PHONY : add/bearssl
add/bearssl: | remove/bearssl
	-@echo " "
	-@echo "* Cloning BearSSL and copying source files to lib/bearssl."
	-@echo "  Please review the BearSSL license."
	@git clone https://www.bearssl.org/git/BearSSL tmp/bearssl
	@mkdir lib/bearssl
	-@find tmp/bearssl/src -name "*.*" -exec mv "{}" lib/bearssl \;
	-@find tmp/bearssl/inc -name "*.*" -exec mv "{}" lib/bearssl \;
	-@make clean

.PHONY : remove/bearssl
remove/bearssl:
	-@echo "* Removing existing BearSSL source files."
	-@rm -R -f lib/bearssl 2> /dev/null || echo "" >> /dev/null
	-@make clean


#############################################################################
# Tasks - library code dumping & CMake
#############################################################################

ifndef DUMP_LIB
.PHONY : libdump
libdump: cmake

else

ifeq ($(LIBDIR_PRIV),)

.PHONY : libdump
libdump: cmake
	-@rm -R $(DUMP_LIB) 2> /dev/null
	-@mkdir $(DUMP_LIB)
	-@mkdir $(DUMP_LIB)/src
	-@mkdir $(DUMP_LIB)/include
	-@mkdir $(DUMP_LIB)/all  # except README.md files
	-@cp -n $(foreach dir,$(LIBDIR_PUB), $(wildcard $(addsuffix /, $(basename $(dir)))*.[^m]*)) $(DUMP_LIB)/all 2> /dev/null
	-@cp -n $(foreach dir,$(LIBDIR_PUB), $(wildcard $(addsuffix /, $(basename $(dir)))*.h*)) $(DUMP_LIB)/include 2> /dev/null
	-@cp -n $(foreach dir,$(LIBDIR_PUB), $(wildcard $(addsuffix /, $(basename $(dir)))*.[^hm]*)) $(DUMP_LIB)/src 2> /dev/null

else

.PHONY : libdump
libdump: cmake
	-@rm -R $(DUMP_LIB) 2> /dev/null
	-@mkdir $(DUMP_LIB)
	-@mkdir $(DUMP_LIB)/src
	-@mkdir $(DUMP_LIB)/include
	-@mkdir $(DUMP_LIB)/all  # except README.md files
	-@cp -n $(foreach dir,$(LIBDIR_PUB), $(wildcard $(addsuffix /, $(basename $(dir)))*.[^m]*)) $(DUMP_LIB)/all 2> /dev/null
	-@cp -n $(foreach dir,$(LIBDIR_PUB), $(wildcard $(addsuffix /, $(basename $(dir)))*.h*)) $(DUMP_LIB)/include 2> /dev/null
	-@cp -n $(foreach dir,$(LIBDIR_PUB), $(wildcard $(addsuffix /, $(basename $(dir)))*.[^hm]*)) $(DUMP_LIB)/src 2> /dev/null
	-@cp -n $(foreach dir,$(LIBDIR_PRIV), $(wildcard $(addsuffix /, $(basename $(dir)))*.[^m]*)) $(DUMP_LIB)/all 2> /dev/null
	-@cp -n $(foreach dir,$(LIBDIR_PRIV), $(wildcard $(addsuffix /, $(basename $(dir)))*.h*)) $(DUMP_LIB)/include 2> /dev/null
	-@cp -n $(foreach dir,$(LIBDIR_PRIV), $(wildcard $(addsuffix /, $(basename $(dir)))*.[^hm]*)) $(DUMP_LIB)/src 2> /dev/null

endif
endif

ifndef CMAKE_LIBFILE_NAME
.PHONY : cmake
cmake:

else

.PHONY : cmake
cmake:
	-@rm $(CMAKE_LIBFILE_NAME) 2> /dev/null
	@touch $(CMAKE_LIBFILE_NAME)
	@echo 'project(facil.io C)' >> $(CMAKE_LIBFILE_NAME)
	@echo 'cmake_minimum_required(VERSION 2.4)' >> $(CMAKE_LIBFILE_NAME)
	@echo '' >> $(CMAKE_LIBFILE_NAME)
	@echo 'find_package(Threads REQUIRED)' >> $(CMAKE_LIBFILE_NAME)
	@echo '' >> $(CMAKE_LIBFILE_NAME)
	@echo 'set(facil.io_SOURCES' >> $(CMAKE_LIBFILE_NAME)
	@$(foreach src,$(LIBSRC),echo '  $(src)' >> $(CMAKE_LIBFILE_NAME);)
	@echo ')' >> $(CMAKE_LIBFILE_NAME)
	@echo '' >> $(CMAKE_LIBFILE_NAME)
	@echo 'add_library(facil.io $${facil.io_SOURCES})' >> $(CMAKE_LIBFILE_NAME)
	@echo 'target_link_libraries(facil.io' >> $(CMAKE_LIBFILE_NAME)
	@echo '  PRIVATE Threads::Threads' >> $(CMAKE_LIBFILE_NAME)
	@$(foreach src,$(LINKER_LIBS),echo '  PUBLIC $(src)' >> $(CMAKE_LIBFILE_NAME);)
	@echo '  )' >> $(CMAKE_LIBFILE_NAME)
	@echo 'target_include_directories(facil.io' >> $(CMAKE_LIBFILE_NAME)
	@$(foreach src,$(LIBDIR_PUB),echo '  PUBLIC  $(src)' >> $(CMAKE_LIBFILE_NAME);)
	@$(foreach src,$(LIBDIR_PRIV),echo '  PRIVATE $(src)' >> $(CMAKE_LIBFILE_NAME);)
	@echo ')' >> $(CMAKE_LIBFILE_NAME)
	@echo '' >> $(CMAKE_LIBFILE_NAME)

endif

#############################################################################
# Tasks - make variable printout (test)
#############################################################################

# Prints the make variables, used for debugging the makefile
.PHONY : vars
vars:
	@echo "CC: $(CC)"
	@echo ""
	@echo "BIN: $(BIN)"
	@echo ""
	@echo "LIBDIR_PUB: $(LIBDIR_PUB)"
	@echo ""
	@echo "LIBDIR_PRIV: $(LIBDIR_PRIV)"
	@echo ""
	@echo "MAINDIR: $(MAINDIR)"
	@echo ""
	@echo "FOLDERS: $(FOLDERS)"
	@echo ""
	@echo "BUILDTREE: $(BUILDTREE)"
	@echo ""
	@echo "LIBSRC: $(LIBSRC)"
	@echo ""
	@echo "MAINSRC: $(MAINSRC)"
	@echo ""
	@echo "LIB_OBJS: $(LIB_OBJS)"
	@echo ""
	@echo "MAIN_OBJS: $(MAIN_OBJS)"
	@echo ""
	@echo "OBJS_DEPENDENCY: $(OBJS_DEPENDENCY)"
	@echo ""
	@echo "CFLAGS: $(CFLAGS)"
	@echo ""
	@echo "CPPFLAGS: $(CPPFLAGS)"
	@echo ""
	@echo "LINKER_LIBS: $(LINKER_LIBS)"
	@echo ""
	@echo "LINKER_LIBS_EXT: $(LINKER_LIBS_EXT)"
	@echo ""
	@echo "LINKER_FLAGS: $(LINKER_FLAGS)"