cmake_minimum_required (VERSION 2.6)
project(keeper)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
# set default cxxflags
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++1y -Wno-sign-compare -Wno-unused-variable -Wno-shift-count-overflow -ftemplate-depth=512 -DUSE_STEAMWORKS -I /home/michal/keeperrl/extern/steamworks/public")
# clang specific cflags
if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-tautological-constant-out-of-range-compare -Wno-mismatched-tags")
endif()

set(STDAFX_H "${CMAKE_CURRENT_SOURCE_DIR}/stdafx.h")
set(STDAFX_H_GCH "${CMAKE_CURRENT_BINARY_DIR}/stdagx.h.gch")

# set debug cxxflags
set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wimplicit-fallthrough -Wno-unused-function")
#if ((${CMAKE_BUILD_TYPE} MATCHES "Debug") AND (${CMAKE_CXX_COMPILER_ID} MATCHES "Clang"))
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=lld -L ${CMAKE_CURRENT_SOURCE_DIR}/extern/steamworks/redistributable_bin/linux64/ -L /usr/local/lib -lsteam_api -Wl,-rpath=. -Wl,--gdb-index")
  #endif()

# additional cmake modules directory
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")

# find required libraries
find_package(SDL2 REQUIRED)
find_package(SDL2_image REQUIRED)
find_package(OpenGL REQUIRED)
if(APPLE)
    # assume built-in pthreads on MacOS
    set(CMAKE_THREAD_LIBS_INIT "-lpthread")
    set(CMAKE_HAVE_THREADS_LIBRARY 1)
    set(CMAKE_USE_WIN32_THREADS_INIT 0)
    set(CMAKE_USE_PTHREADS_INIT 1)
    set(THREADS_PREFER_PTHREAD_FLAG ON)
else()
    find_package(Threads REQUIRED)
endif()
find_package(CURL REQUIRED)
find_package(ZLIB REQUIRED)
find_package(OpenAL REQUIRED)
find_package(Vorbis REQUIRED)
find_package(Ogg REQUIRED)
find_package(VorbisFile REQUIRED)
find_package(THEORA REQUIRED)

# generate version.h
file(GLOB GENERATE_VERSION_SH "gen_version.sh")
set(KEEPER_VERSION_H "${CMAKE_CURRENT_SOURCE_DIR}/version.h")
add_custom_command(
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/
    COMMAND ${GENERATE_VERSION_SH}
    DEPENDS ${GENERATE_VERSION_SH}
    OUTPUT ${KEEPER_VERSION_H}
    COMMENT "Generating version.h"
)

# check member serialization
# the stamp file is not actually generated, but it doesn't seem to matter
file(GLOB CHECK_SERIAL_SH "check_serial.sh")
set(CHECK_SERIAL_STAMP "${CMAKE_CURRENT_SOURCE_DIR}/check_serial.stamp")
add_custom_command(
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/
    COMMAND bash ${CHECK_SERIAL_SH}
    DEPENDS ${CHECK_SERIAL_SH}
    OUTPUT ${CHECK_SERIAL_STAMP}
    COMMENT "Checking serialization"
)

# rules to create `keeper` binary
file(GLOB SOURCES "*.cpp" "extern/*.cpp")
add_executable(keeper ${SOURCES} ${KEEPER_VERSION_H} ${CHECK_SERIAL_STAMP})
target_include_directories(keeper PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
target_include_directories(keeper PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/extern)
target_include_directories(keeper PRIVATE ${SDL2_INCLUDE_DIRS})
target_link_libraries(keeper PRIVATE 
    ${SDL2_LIBRARIES}
    ${SDL2_IMAGE_LIBRARY}
    ${OPENGL_gl_LIBRARY}
    ${CMAKE_THREAD_LIBS_INIT}
    ${CURL_LIBRARIES}
    ${ZLIB_LIBRARIES}
    ${OPENAL_LIBRARY}
    ${VORBIS_LIBRARIES}
    ${OGG_LIBRARIES}
    ${THEORA_dec_LIBRARY}
    ${VorbisFile_LIBRARIES}
    )

# set up definitions
if ((${CMAKE_BUILD_TYPE} MATCHES "Release"))
    target_compile_definitions(keeper PRIVATE RELEASE=1)
else()
# generate stdafx.h.gch for debug build
# workaround to unquote the cxxflags
set(CXX_FLAGS_LIST ${CMAKE_CXX_FLAGS})
separate_arguments(CXX_FLAGS_LIST)
add_custom_command(
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/
    COMMAND ${CMAKE_CXX_COMPILER} ${CXX_FLAGS_LIST} -x c++-header ${STDAFX_H} -MMD -o ${STDAFX_H_GCH}
    DEPENDS ${STDAFX_H}
    OUTPUT ${STDAFX_H_GCH}
    COMMENT "Generating ${STDAFX_H_GCH}"
)
if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -include-pch ${STDAFX_H_GCH}")
endif()
target_sources(keeper PRIVATE ${STDAFX_H_GCH})
endif()

if(ENABLE_LOCAL_USER_DIR)
    target_compile_definitions(keeper PRIVATE ENABLE_LOCAL_USER_DIR=1)
endif()
if(SANITIZE)
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
endif()
if(PROF)
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pg")
endif()
if(EASY_PROFILER)
    target_compile_definitions(keeper PRIVATE EASY_PROFILER=1)
    target_link_libraries(keeper PRIVATE libeasy_profiler)
endif()