# Copyright (c) 2014, The Monero Project
# 
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without modification, are
# permitted provided that the following conditions are met:
# 
# 1. Redistributions of source code must retain the above copyright notice, this list of
#    conditions and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright notice, this list
#    of conditions and the following disclaimer in the documentation and/or other
#    materials provided with the distribution.
# 
# 3. Neither the name of the copyright holder nor the names of its contributors may be
#    used to endorse or promote products derived from this software without specific
#    prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# 
# Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

cmake_minimum_required(VERSION 2.8.6)

function (die msg)
  if (NOT WIN32)
    string(ASCII 27 Esc)
    set(ColourReset "${Esc}[m")
    set(BoldRed     "${Esc}[1;31m")
  else ()
    set(ColourReset "")
    set(BoldRed     "")
  endif ()

  message(FATAL_ERROR "${BoldRed}${msg}${ColourReset}")
endfunction ()

set (CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")

if (NOT DEFINED ENV{DEVELOPER_LOCAL_TOOLS})
	message(STATUS "Could not find DEVELOPER_LOCAL_TOOLS in env (not required)")
	set(BOOST_IGNORE_SYSTEM_PATHS_DEFAULT OFF)
elseif ("$ENV{DEVELOPER_LOCAL_TOOLS}" EQUAL 1)
	message(STATUS "Found: env DEVELOPER_LOCAL_TOOLS = 1")
	set(BOOST_IGNORE_SYSTEM_PATHS_DEFAULT ON)
else()
	message(STATUS "found: env DEVELOPER_LOCAL_TOOLS = 0")
	set(BOOST_IGNORE_SYSTEM_PATHS_DEFAULT OFF)
endif()

message(STATUS "BOOST_IGNORE_SYSTEM_PATHS defaults to ${BOOST_IGNORE_SYSTEM_PATHS_DEFAULT}")
option(BOOST_IGNORE_SYSTEM_PATHS "Ignore boost system paths for local boost installation" ${BOOST_IGNORE_SYSTEM_PATHS_DEFAULT})

set_property(GLOBAL PROPERTY USE_FOLDERS ON)
enable_testing()

# Check if we're on FreeBSD so we can exclude the local miniupnpc (it should be installed from ports instead)
# CMAKE_SYSTEM_NAME checks are commonly known, but specifically taken from libsdl's CMakeLists
if(CMAKE_SYSTEM_NAME MATCHES "kFreeBSD.*")
  set(FREEBSD TRUE)
elseif(CMAKE_SYSTEM_NAME MATCHES "DragonFly.*|FreeBSD")
  set(FREEBSD TRUE)
endif()

# TODO: check bsdi, NetBSD, OpenBSD, to see if they need the same FreeBSD changes
# 
# elseif(CMAKE_SYSTEM_NAME MATCHES "kNetBSD.*|NetBSD.*")
#   set(NETBSD TRUE)
# elseif(CMAKE_SYSTEM_NAME MATCHES "kOpenBSD.*|OpenBSD.*")
#   set(OPENBSD TRUE)
# elseif(CMAKE_SYSTEM_NAME MATCHES ".*BSDI.*")
#   set(BSDI TRUE)

include_directories(src contrib/epee/include external "${CMAKE_BINARY_DIR}/version")

if(APPLE)
  include_directories(SYSTEM /usr/include/malloc)
endif()

if(MSVC OR MINGW)
  set(DEFAULT_STATIC true)
else()
  set(DEFAULT_STATIC false)
endif()
set(STATIC ${DEFAULT_STATIC} CACHE BOOL "Link libraries statically")

IF(STATIC)
  IF(MSVC)
    SET(CMAKE_FIND_LIBRARY_SUFFIXES .lib .dll.a .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
  ELSE()
    SET(CMAKE_FIND_LIBRARY_SUFFIXES .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
  ENDIF()
ENDIF()

if (UNIX AND NOT APPLE)
  # Note that at the time of this writing the -Wstrict-prototypes flag added below will make this fail
  find_package(Threads)
endif()

add_subdirectory(external)

# Final setup for miniupnpc
if(UPNP_STATIC)
  add_definitions("-DUPNP_STATIC")
else()
  add_definitions("-DUPNP_DYNAMIC")
  include_directories(${UPNP_INCLUDE})
endif()

# Final setup for libunbound
include_directories(${UNBOUND_INCLUDE})

if(MSVC)
  add_definitions("/bigobj /MP /W3 /GS- /D_CRT_SECURE_NO_WARNINGS /wd4996 /wd4345 /D_WIN32_WINNT=0x0600 /DWIN32_LEAN_AND_MEAN /DGTEST_HAS_TR1_TUPLE=0 /FIinline_c.h /D__SSE4_1__")
  # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Dinline=__inline")
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10485760")
  if(STATIC)
    foreach(VAR CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS_RELEASE)
      string(REPLACE "/MD" "/MT" ${VAR} "${${VAR}}")
    endforeach()
  endif()
  include_directories(SYSTEM src/platform/msc)
else()
  set(ARCH native CACHE STRING "CPU to build for: -march value or default")
  if("${ARCH}" STREQUAL "default")
    set(ARCH_FLAG "")
  else()
    set(ARCH_FLAG "-march=${ARCH}")
  endif()
  set(WARNINGS "-Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Werror -Wno-error=extra -Wno-error=deprecated-declarations -Wno-error=sign-compare -Wno-error=strict-aliasing -Wno-error=type-limits -Wno-unused-parameter -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized")
  if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
    set(WARNINGS "${WARNINGS} -Wno-error=mismatched-tags -Wno-error=null-conversion -Wno-overloaded-shift-op-parentheses -Wno-error=shift-count-overflow -Wno-error=tautological-constant-out-of-range-compare -Wno-error=unused-private-field -Wno-error=unneeded-internal-declaration")
  else()
    set(WARNINGS "${WARNINGS} -Wlogical-op -Wno-error=maybe-uninitialized")
  endif()
  if(MINGW)
    set(WARNINGS "${WARNINGS} -Wno-error=unused-value -Wno-error=unused-but-set-variable")
    set(MINGW_FLAG "${MINGW_FLAG} -DWIN32_LEAN_AND_MEAN")
    set(Boost_THREADAPI win32)
    include_directories(SYSTEM src/platform/mingw)
  endif()
  set(C_WARNINGS "-Waggregate-return -Wnested-externs -Wold-style-definition -Wstrict-prototypes")
  set(CXX_WARNINGS "-Wno-reorder -Wno-missing-field-initializers")
  try_compile(STATIC_ASSERT_RES "${CMAKE_CURRENT_BINARY_DIR}/static-assert" "${CMAKE_CURRENT_SOURCE_DIR}/utils/test-static-assert.c" COMPILE_DEFINITIONS "-std=c11")
  if(STATIC_ASSERT_RES)
    set(STATIC_ASSERT_FLAG "")
  else()
    set(STATIC_ASSERT_FLAG "-Dstatic_assert=_Static_assert")
  endif()
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11 -D_GNU_SOURCE ${MINGW_FLAG} ${STATIC_ASSERT_FLAG} ${WARNINGS} ${C_WARNINGS} ${ARCH_FLAG} -maes")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -D_GNU_SOURCE ${MINGW_FLAG} ${WARNINGS} ${CXX_WARNINGS} ${ARCH_FLAG} -maes")
  if(APPLE)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DGTEST_HAS_TR1_TUPLE=0")
  endif()
  if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT (CMAKE_C_COMPILER_VERSION VERSION_LESS 4.8))
    set(DEBUG_FLAGS "-g3 -Og")
  else()
    set(DEBUG_FLAGS "-g3 -O0")
  endif()

  set(RELEASE_FLAGS "-Ofast -DNDEBUG -Wno-unused-variable")

  if(NOT DEFINED USE_LTO_DEFAULT)
    set(USE_LTO_DEFAULT true)
  endif()
  set(USE_LTO ${USE_LTO_DEFAULT} CACHE BOOL "Use Link-Time Optimization (Release mode only)")

  # There is a clang bug that does not allow to compile code that uses AES-NI intrinsics if -flto is enabled, so explicitly disable
  if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
  	set(USE_LTO false)
  endif()
  if(USE_LTO)
    set(RELEASE_FLAGS "${RELEASE_FLAGS} -flto")
    if(STATIC)
      set(RELEASE_FLAGS "${RELEASE_FLAGS} -ffat-lto-objects")
    endif()
    # Since gcc 4.9 the LTO format is non-standard (slim), so we need the gcc-specific ar and ranlib binaries
    if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9.0))
      set(CMAKE_AR "gcc-ar")
      set(CMAKE_RANLIB "gcc-ranlib")
    endif()
  endif()

  set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${DEBUG_FLAGS}")
  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${DEBUG_FLAGS}")
  set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${RELEASE_FLAGS}")
  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${RELEASE_FLAGS}")
  if(STATIC AND NOT APPLE AND NOT FREEBSD)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
  endif()
endif()

if (BOOST_IGNORE_SYSTEM_PATHS)
	set(Boost_NO_SYSTEM_PATHS TRUE)
endif()

if(STATIC)
  set(Boost_USE_STATIC_LIBS ON)
  set(Boost_USE_STATIC_RUNTIME ON)
endif()
find_package(Boost 1.53 QUIET REQUIRED COMPONENTS system filesystem thread date_time chrono regex serialization program_options)

if(NOT Boost_FOUND)
  die("Could not find Boost libraries, please make sure you have installed Boost or libboost-all-dev (1.53 or 1.55+) or the equivalent")
endif()

if((${Boost_MAJOR_VERSION} EQUAL 1) AND (${Boost_MINOR_VERSION} EQUAL 54))
  die("Boost version 1.54 is unsupported due to a bug (see: http://goo.gl/RrCFmA), please install Boost 1.53 or 1.55 and above")
endif()

include_directories(SYSTEM ${Boost_INCLUDE_DIRS})
if(MINGW)
  set(EXTRA_LIBRARIES pthread;mswsock;ws2_32)
elseif(APPLE OR FREEBSD)
  set(EXTRA_LIBRARIES "")
elseif(NOT MSVC)
  find_library(RT rt)
  find_library(PTHREAD pthread)
  find_library(DL dl)
  set(EXTRA_LIBRARIES ${RT} ${PTHREAD} ${DL})
endif()

include(version.cmake)

add_subdirectory(src)
add_subdirectory(tests)