# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
# 
#      http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#--------------------------------------------
# SQLite build script for amalgamation
#
# default folder structure as follows
# <project root folder>
#      src/
#
#--------------------------------------------
cmake_minimum_required(VERSION 2.8 FATAL_ERROR)

set(PROJECT_NAME sqlite)

# define project for C language
project(${PROJECT_NAME} C)

message("Building on: ${CMAKE_SYSTEM_NAME}")

option(SQLITE_BUILD_STATIC  "Build SQLite static library" ON)
option(SQLITE_BUILD_SHARED  "Build SQLite shared library" ON)
option(WITH_SQLITE_DEBUG    "Build SQLite debug features" OFF)
option(WITH_SQLITE_MEMDEBUG "Build SQLite memory debug features" OFF)
option(WITH_SQLITE_RTREE    "Build R*Tree index extension" OFF)

set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
set(INSTALL_INC_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")

set(SQLITE_WIN_BUILD OFF)
if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
    set(SQLITE_WIN_BUILD ON)
endif()

#TODO replace with common checks from root project for -m64, -mt, etc.
include(CheckCCompilerFlag)

set(CMAKE_REQUIRED_LIBRARIES -m64)
check_c_compiler_flag(-m64 CFLAGS_M64_ALLOWED)
set(CMAKE_REQUIRED_LIBRARIES)

check_c_compiler_flag(-mt CFLAGS_mt_ALLOWED)

if (CFLAGS_M64_ALLOWED)
  set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -m64)
  add_compile_options(-m64)
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m64")
  set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -m64")
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m64")
endif()

if (CFLAGS_mt_ALLOWED)
  set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -mt)
  add_compile_options(-mt)
endif()
#END TODO replace

set(CMAKE_DEBUG_POSTFIX d)

# ---------------------
# Version detection
# ---------------------
file(STRINGS "${PROJECT_SOURCE_DIR}/sqlite3.h" _sqlite_api_h_VER_STRING REGEX ".*#define[ ]+SQLITE_VERSION[ ]+")

string(REGEX MATCH "[0-9\\.]+" SQLITE_VER_STRING ${_sqlite_api_h_VER_STRING})
string(REGEX MATCHALL "[0-9]+" _sqlite_ver_LIST "${SQLITE_VER_STRING}")
list(LENGTH _sqlite_ver_LIST _sqlite_list_len)
list(GET _sqlite_ver_LIST 0 SQLITE_VER_MAJOR)
list(GET _sqlite_ver_LIST 1 SQLITE_VER_MINOR)
list(GET _sqlite_ver_LIST 2 SQLITE_VER_PATCH)
if(_sqlite_list_len EQUAL 4)
    list(GET _sqlite_ver_LIST 3 SQLITE_VER_PATCHLEVEL)
    message("Patch level: ${SQLITE_VER_PATCHLEVEL}")
endif()

message("FOUND: SQLite version = ${SQLITE_VER_STRING}")

set(SQLITE_DYN_NAME "${PROJECT_NAME}${SQLITE_VER_MAJOR}")
set(SQLITE_STATIC_NAME "${SQLITE_DYN_NAME}-static")

find_package(Threads REQUIRED)

# add include path for project
include_directories(${PROJECT_SOURCE_DIR})

set(SRC_LIB_FILE ${PROJECT_SOURCE_DIR}/sqlite${SQLITE_VER_MAJOR}.c)
set(SRC_SHELL_FILE ${PROJECT_SOURCE_DIR}/shell.c)
file(GLOB HDR_FILES ${PROJECT_SOURCE_DIR}/*.h)

# adding compilation flags depending on options
if(WITH_SQLITE_DEBUG)
    add_definitions(-DSQLITE_DEBUG)
endif()
if(WITH_SQLITE_MEMDEBUG)
    add_definitions(-DSQLITE_MEMDEBUG)
endif()
if(WITH_SQLITE_RTREE)
    add_definitions(-DSQLITE_ENABLE_RTREE)
endif()

if (SQLITE_BUILD_STATIC)
    # build static library
    add_library(${SQLITE_STATIC_NAME} STATIC ${SRC_LIB_FILE})
endif()

if (SQLITE_BUILD_SHARED)
    # build dynamic library
    add_library(${SQLITE_DYN_NAME} SHARED ${SRC_LIB_FILE})
    if (SQLITE_WIN_BUILD)
        #then we do dll library, so need to export api
        set_target_properties(${SQLITE_DYN_NAME} PROPERTIES DEFINE_SYMBOL "SQLITE_API=__declspec(dllexport)")
    endif()
endif()

# build shell executable
add_executable(shell ${SRC_SHELL_FILE})

if (SQLITE_BUILD_SHARED)
    # preferred is shared library
    target_link_libraries(shell ${SQLITE_DYN_NAME} ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
elseif(SQLITE_BUILD_STATIC)
    target_link_libraries(shell ${SQLITE_STATIC_NAME} ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
else()
    # no static or dynamic option selected
    message(FATAL_ERROR "either static or dynamic option should be selected")
endif()

# installation
list(APPEND TO_INSTALL shell)
if(SQLITE_BUILD_SHARED)
    list(APPEND TO_INSTALL ${SQLITE_DYN_NAME})
endif()
if(SQLITE_BUILD_STATIC)
    list(APPEND TO_INSTALL ${SQLITE_STATIC_NAME})
endif()

install(TARGETS ${TO_INSTALL}
        RUNTIME DESTINATION "${INSTALL_BIN_DIR}"
        ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
        LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )
install(FILES ${HDR_FILES} DESTINATION "${INSTALL_INC_DIR}")