# CMake project definition file.
project(libgme)

include (CheckCXXCompilerFlag)

set(GME_VERSION 0.6.0 CACHE INTERNAL "libgme Version")

# 2.6+ always assumes FATAL_ERROR, but 2.4 and below don't.
# Of course, 2.4 might work, in which case you're welcome to drop
# down the requirement, but I can't test that.
cmake_minimum_required(VERSION 2.6 FATAL_ERROR)

# Default emulators to build (all of them! ;)
if (NOT DEFINED USE_GME_AY)
    SET(USE_GME_AY 1 CACHE BOOL "Enable support for Spectrum ZX music emulation")
endif()

if (NOT DEFINED USE_GME_GBS)
    SET(USE_GME_GBS 1 CACHE BOOL "Enable support for Game Boy music emulation")
endif()

if (NOT DEFINED USE_GME_GYM)
    SET(USE_GME_GYM 1 CACHE BOOL "Enable Sega MegaDrive/Genesis music emulation")
endif()

if (NOT DEFINED USE_GME_HES)
    SET(USE_GME_HES 1 CACHE BOOL "Enable PC Engine/TurboGrafx-16 music emulation")
endif()

if (NOT DEFINED USE_GME_KSS)
    SET(USE_GME_KSS 1 CACHE BOOL "Enable MSX or other Z80 systems music emulation")
endif()

if (NOT DEFINED USE_GME_NSF)
    SET(USE_GME_NSF 1 CACHE BOOL "Enable NES NSF music emulation")
endif()

if (NOT DEFINED USE_GME_NSFE)
    SET(USE_GME_NSFE 1 CACHE BOOL "Enable NES NSFE and NSF music emulation")
endif()

if (NOT DEFINED USE_GME_SAP)
    SET(USE_GME_SAP 1 CACHE BOOL "Enable Atari SAP music emulation")
endif()

if (NOT DEFINED USE_GME_SPC)
    SET(USE_GME_SPC 1 CACHE BOOL "Enable SNES SPC music emulation")
endif()

if (NOT DEFINED USE_GME_VGM)
    SET(USE_GME_VGM 1 CACHE BOOL "Enable Sega VGM/VGZ music emulation")
endif()

if (USE_GME_NSFE AND NOT USE_GME_NSF)
    MESSAGE(" -- NSFE support requires NSF, enabling NSF support. --")
    SET(USE_GME_NSF 1 CACHE BOOL "Enable NES NSF music emulation" FORCE)
endif()

# Check for GCC "visibility" support.
if (CMAKE_COMPILER_IS_GNUCXX)
   check_cxx_compiler_flag (-fvisibility=hidden __LIBGME_TEST_VISIBILITY)
   set (ENABLE_VISIBILITY OFF)
   if (__LIBGME_TEST_VISIBILITY)
      # get the gcc version
      exec_program(${CMAKE_CXX_COMPILER} ARGS --version OUTPUT_VARIABLE _gcc_version_info)
      string (REGEX MATCH "[3-9]\\.[0-9]\\.[0-9]" _gcc_version "${_gcc_version_info}")

      # gcc <4.1 had poor support for symbol visibility
      if ((${_gcc_version} VERSION_GREATER "4.1") OR (${_gcc_version} VERSION_EQUAL "4.1"))
         set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
         set (ENABLE_VISIBILITY ON)
         add_definitions (-DLIBGME_VISIBILITY)

         # GCC >= 4.2 also correctly supports making inline members have hidden
         # visibility by default.
         if ((${_gcc_version} VERSION_GREATER "4.2") OR (${_gcc_version} VERSION_EQUAL "4.2"))
            set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden")
         endif()
      endif()
   endif() # test visibility
endif (CMAKE_COMPILER_IS_GNUCXX)

# Cache this result
set( LIBGME_HAVE_GCC_VISIBILITY ${ENABLE_VISIBILITY} CACHE BOOL "GCC support for hidden visibility")

# Shared library defined here
add_subdirectory(gme)

# EXCLUDE_FROM_ALL adds build rules but keeps it out of default build
add_subdirectory(player EXCLUDE_FROM_ALL)
add_subdirectory(demo EXCLUDE_FROM_ALL)