I assumed NO_VIDEOREC would be set if ${FFMPEG_FOUND} was false. doesn't seem to be the case.
find_package(SDL)find_package(SDL_image)find_package(SDL_net)find_package(SDL_ttf)find_package(SDL_mixer)find_package(FFMPEG)include(${CMAKE_MODULE_PATH}/FindSDL_Extras.cmake)configure_file(${hedgewars_SOURCE_DIR}/hedgewars/config.inc.in ${CMAKE_CURRENT_BINARY_DIR}/config.inc)#SOURCE AND PROGRAMS SECTIONset(hwengine_project ${hedgewars_SOURCE_DIR}/hedgewars/hwengine.pas)set(engine_output_name "hwengine")set(engine_sources ${hwengine_project} SDLh.pas PNGh.pas uAI.pas uAIActions.pas uAIAmmoTests.pas uAIMisc.pas uAmmos.pas uCaptions.pas uChat.pas uCollisions.pas uCommands.pas uCommandHandlers.pas uConsole.pas uConsts.pas uDebug.pas uFloat.pas uGame.pas uGears.pas uGearsHandlers.pas uGearsHandlersRope.pas uGearsRender.pas uGearsUtils.pas uIO.pas uInputHandler.pas uLand.pas uLandGenMaze.pas uLandGraphics.pas uLandObjects.pas uLandOutline.pas uLandPainted.pas uLandTemplates.pas uLandTexture.pas uLocale.pas uMisc.pas uMobile.pas uRandom.pas uRender.pas uRenderUtils.pas uScript.pas uSinTable.pas uSound.pas uStats.pas uStore.pas uTeams.pas uTextures.pas uTypes.pas uUtils.pas uVariables.pas uVideoRec.pas uVisualGears.pas uWorld.pas GSHandlers.inc VGSHandlers.inc ArgParsers.inc options.inc adler32.pas ${CMAKE_CURRENT_BINARY_DIR}/config.inc )if(BUILD_ENGINE_LIBRARY) message(STATUS "Engine will be built as library (experimental)") set(hwengine_project ${hedgewars_SOURCE_DIR}/hedgewars/hwLibrary.pas) set(pascal_flags "-dHWLIBRARY" ${pascal_flags}) # create position independent code, only required for x68_64 builds, similar to -fPIC if(CMAKE_SIZEOF_VOID_P MATCHES "8") set(pascal_flags "-Cg" ${pascal_flags}) endif(CMAKE_SIZEOF_VOID_P MATCHES "8") # due to compiler/linker issues on Max OS X 10.6 -k-no_order_inits is needed to avoid linking fail if(APPLE AND current_macosx_version GREATER "10.5") set(pascal_flags "-k-no_order_inits" ${pascal_flags}) endif() if (APPLE) set(engine_output_name "hwengine.dylib") endif (APPLE)endif(BUILD_ENGINE_LIBRARY)IF(FPC) set(fpc_executable ${FPC})ELSE() find_program(fpc_executable fpc)ENDIF()if(fpc_executable) exec_program(${fpc_executable} ARGS "-iV" OUTPUT_VARIABLE fpc_output)endif(fpc_executable)set(noexecstack_flags "-k-z" "-knoexecstack")file(WRITE ${EXECUTABLE_OUTPUT_PATH}/checkstack.pas "begin end.")exec_program(${fpc_executable} ${EXECUTABLE_OUTPUT_PATH} ARGS ${noexecstack_flags} checkstack.pas OUTPUT_VARIABLE noout RETURN_VALUE testnoexecstack )if(${testnoexecstack}) set (noexecstack_flags "")endif(${testnoexecstack})if(APPLE) string(REGEX MATCH "[pP][pP][cC]+" powerpc_build "${CMAKE_OSX_ARCHITECTURES}") string(REGEX MATCH "[iI]386+" i386_build "${CMAKE_OSX_ARCHITECTURES}") string(REGEX MATCH "[xX]86_64+" x86_64_build "${CMAKE_OSX_ARCHITECTURES}") if(powerpc_build) set(powerpc_build "powerpc") endif() #on OSX we need to provide the main() function when building as executable if(NOT BUILD_ENGINE_LIBRARY) #let's look for the bundled sdlmain, if not found build our own find_package(SDL REQUIRED) #remove the ";-framework Cocoa" from the SDL_LIBRARY variable string(REGEX REPLACE "(.*);-.*" "\\1" sdl_dir "${SDL_LIBRARY}") #find libsdmain.a find_file(SDLMAIN_LIB libSDLMain.a PATHS ${sdl_dir}/Resources/) if(SDLMAIN_LIB MATCHES "SDLMAIN_LIB-NOTFOUND") set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin) include_directories(${SDL_INCLUDE_DIR}) add_library (SDLmain STATIC SDLMain.m) #add a dependency to the hwengine target set(engine_sources ${engine_sources} SDLmain) set(SDLMAIN_LIB "${CMAKE_BINARY_DIR}/bin/libSDLmain.a") endif() set(pascal_flags "-k${SDLMAIN_LIB}" ${pascal_flags}) endif()endif(APPLE)#PASCAL DETECTION SECTIONstring(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" fpc_version "${fpc_output}")if(fpc_version) string(REGEX REPLACE "([0-9]+)\\.[0-9]+\\.[0-9]+" "\\1" fpc_vers_major "${fpc_version}") string(REGEX REPLACE "[0-9]+\\.([0-9]+)\\.[0-9]+" "\\1" fpc_vers_minor "${fpc_version}") string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" fpc_vers_patch "${fpc_version}") message(STATUS "Freepascal version installed: ${fpc_vers_major}.${fpc_vers_minor}") math(EXPR fpc_version "${fpc_vers_major}*10000 + ${fpc_vers_minor}*100 + ${fpc_vers_patch}") if(fpc_version LESS "020200") message(FATAL_ERROR "Minimum required version of FreePascal is 2.2.0") elseif(APPLE AND (fpc_version LESS "020600")) message(FATAL_ERROR "Minimum required version of FreePascal is 2.6.0 on Mac OS X") endif()else() message(FATAL_ERROR "No FreePascal compiler found!")endif()#DEPENDECIES AND EXECUTABLES SECTIONif(NOT NOPNG) find_package(PNG) if(${PNG_FOUND}) message(STATUS "PNG screenshots enabled (library found at ${PNG_LIBRARY})") set(pascal_flags "-dPNG_SCREENSHOTS" ${pascal_flags}) if(APPLE) # need to explictly link with the static lib -- maybe windows too? string(REGEX REPLACE "(.*)libpng.*" "\\1" PNG_LIBDIR "${PNG_LIBRARY}") set(pascal_flags "-k${PNG_LIBDIR}/libpng.a" ${pascal_flags}) endif() else() message(STATUS "PNG library not found, switching to screenshots in BMP format") endif()else() message(STATUS "PNG screenshots disabled per user request, using BMP format")endif()if(NOT NO_VIDEOREC) if(${FFMPEG_FOUND}) message(STATUS "Compiling with video recording") include_directories(${FFMPEG_INCLUDE_DIR}) set(pascal_flags "-dUSE_VIDEO_RECORDING" ${pascal_flags}) set(LIBRARY_OUTPUT_PATH ${EXECUTABLE_OUTPUT_PATH}) IF (WIN32) # there are some problems with linking our avwrapper as static lib, so link it as shared add_library(avwrapper SHARED avwrapper.c) target_link_libraries(avwrapper ${FFMPEG_LIBRARIES}) install(PROGRAMS "${EXECUTABLE_OUTPUT_PATH}/${CMAKE_SHARED_LIBRARY_PREFIX}avwrapper${CMAKE_SHARED_LIBRARY_SUFFIX}" DESTINATION ${target_dir}) ELSE() add_library(avwrapper STATIC avwrapper.c) set(pascal_flags "-k${FFMPEG_LIBAVCODEC}" "-k${FFMPEG_LIBAVFORMAT}" "-k${FFMPEG_LIBAVUTIL}" ${pascal_flags}) # set(pascal_flags "-k${LIBRARY_OUTPUT_PATH}/${CMAKE_STATIC_LIBRARY_PREFIX}avwrapper${CMAKE_STATIC_LIBRARY_SUFFIX}" ${pascal_flags}) ENDIF() else() message(STATUS "FFMPEG library not found, video recording will be disabled") endif()else() message(STATUS "Video recording disabled by user")endif()set(fpc_flags ${noexecstack_flags} ${pascal_flags} ${hwengine_project})IF(NOT APPLE) #here is the command for standard executables or for shared library add_custom_command(OUTPUT "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}${CMAKE_EXECUTABLE_SUFFIX}" COMMAND "${fpc_executable}" ARGS ${fpc_flags} MAIN_DEPENDENCY ${hwengine_project} DEPENDS ${engine_sources} )ELSE() #these are the dependencies for building a universal binary on Mac OS X foreach (build_arch ${powerpc_build} ${i386_build} ${x86_64_build}) set(lipo_args_list "${EXECUTABLE_OUTPUT_PATH}/hwengine.${build_arch}" ${lipo_args_list}) add_custom_command(OUTPUT "${EXECUTABLE_OUTPUT_PATH}/hwengine.${build_arch}" COMMAND "${fpc_executable}" ARGS ${fpc_flags} -ohwengine.${build_arch} -P${build_arch} MAIN_DEPENDENCY ${hwengine_project} DEPENDS ${engine_sources} ) add_custom_target(hwengine.${build_arch} ALL DEPENDS "${EXECUTABLE_OUTPUT_PATH}/hwengine.${build_arch}") endforeach() add_custom_command(OUTPUT "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}" COMMAND "lipo" ARGS ${lipo_args_list} -create -output ${EXECUTABLE_OUTPUT_PATH}/${engine_output_name} DEPENDS ${lipo_args_list} )ENDIF()add_custom_target(${engine_output_name} ALL DEPENDS "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}${CMAKE_EXECUTABLE_SUFFIX}")#when system Lua is not found we need to compile it before engineif(NOT LUA_FOUND) add_dependencies(${engine_output_name} lua)endif()#this command is a workaround to some inlining issues present in older# FreePascal versions and fixed in 2.6, That version is mandatory on OSX,# hence the command is not needed thereif(NOT APPLE) add_custom_target(ENGINECLEAN COMMAND ${CMAKE_BUILD_TOOL} "clean" "${PROJECT_BINARY_DIR}" "${hedgewars_SOURCE_DIR}/hedgewars") if(NO_VIDEOREC OR NOT ${FFMPEG_FOUND}) add_dependencies(${engine_output_name} ENGINECLEAN) else() add_dependencies(avwrapper ENGINECLEAN) endif()endif()install(PROGRAMS "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}${CMAKE_EXECUTABLE_SUFFIX}" DESTINATION ${target_dir})