Remove Qt SVG and Qt OpenGL as hard dependencies
Qt SVG is not used in the frontend (no SVGs are rendered).
Neither is Qt OpenGL used. Qt OpenGL is discouraged anyway.
#this file is included only when system Lua library is not found
file(GLOB lua_src *.c *.h)
if(WIN32)
add_definitions(-DLUA_BUILD_AS_DLL)
else(WIN32)
add_definitions(-DLUA_USE_LINUX)
add_definitions(-fvisibility=default) #TODO: fixme
endif(WIN32)
add_library(lua ${lua_src})
set_target_properties(lua PROPERTIES
VERSION "5.1.4"
SOVERSION 1
OUTPUT_NAME ${lua_output_name})
install(TARGETS lua RUNTIME DESTINATION ${target_binary_install_dir}
LIBRARY DESTINATION ${target_library_install_dir}
ARCHIVE DESTINATION ${target_library_install_dir})
get_target_property(lua_fullpath lua LOCATION)
set(LUA_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR} CACHE STRING "Lua include dir" FORCE)
set(LUA_LIBRARY ${lua_fullpath} CACHE STRING "Lua library" FORCE)
#emscripten does not expose headers but has an internal binary copy
if(BUILD_ENGINE_JS)
set(LUA_LIBRARY "lua_emscripten_internal" CACHE STRING "Lua library" FORCE)
endif()