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include(ExternalProject)
# Convenience variables
set(PREFIX_DIR ${CMAKE_BINARY_DIR}/CMakeExternals/Prefix)
set(BUILD_DIR ${CMAKE_BINARY_DIR}/CMakeExternals/Build)
set(INSTALL_DIR ${CMAKE_BINARY_DIR}/CMakeExternals/Install)
# Options for iOS
set(OPENGL_ES_VERSION "2.0" CACHE STRING "OpenGL ES version (2.0 or 3.0)")
set_property(CACHE OPENGL_ES_VERSION PROPERTY STRINGS 2.0 3.0)
set(IOS_SIMULATOR_ARCHITECTURES "i386;x86_64"
CACHE STRING "iOS Simulator Architectures")
set(IOS_DEVICE_ARCHITECTURES "arm64;armv7;armv7s"
CACHE STRING "iOS Device Architectures")
set(CMAKE_FRAMEWORK_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}/frameworks"
CACHE PATH "Framework install path")
# Fail if the install path is invalid
if (NOT EXISTS ${CMAKE_INSTALL_PREFIX})
message(FATAL_ERROR
"Install path ${CMAKE_INSTALL_PREFIX} does not exist.")
endif()
# Try to make the framework install directory if it doesn't exist
if (NOT EXISTS ${CMAKE_FRAMEWORK_INSTALL_PREFIX})
file(MAKE_DIRECTORY ${CMAKE_FRAMEWORK_INSTALL_PREFIX})
if (NOT EXISTS ${CMAKE_FRAMEWORK_INSTALL_PREFIX})
message(FATAL_ERROR
"Framework install path ${CMAKE_FRAMEWORK_INSTALL_PREFIX} does not exist.")
endif()
endif()
# First, determine how to build
if (CMAKE_GENERATOR MATCHES "NMake Makefiles")
set(VTK_BUILD_COMMAND BUILD_COMMAND nmake)
elseif (CMAKE_GENERATOR MATCHES "Ninja")
set(VTK_BUILD_COMMAND BUILD_COMMAND ninja)
else()
set(VTK_BUILD_COMMAND BUILD_COMMAND make)
endif()
# Compile a minimal VTK for its compile tools
macro(compile_vtk_tools)
ExternalProject_Add(
vtk-compile-tools
SOURCE_DIR ${CMAKE_SOURCE_DIR}
PREFIX ${PREFIX_DIR}/vtk-compile-tools
BINARY_DIR ${BUILD_DIR}/vtk-compile-tools
${VTK_BUILD_COMMAND} vtkCompileTools
CMAKE_ARGS
-DCMAKE_BUILD_TYPE:STRING=Release
-DVTK_BUILD_ALL_MODULES:BOOL=OFF
-DVTK_Group_Rendering:BOOL=OFF
-DVTK_Group_StandAlone:BOOL=ON
-DBUILD_SHARED_LIBS:BOOL=ON
-DBUILD_EXAMPLES:BOOL=OFF
-DBUILD_TESTING:BOOL=OFF
)
endmacro()
compile_vtk_tools()
# Hide some CMake configs from the user
mark_as_advanced(
BUILD_SHARED_LIBS
CMAKE_INSTALL_PREFIX
CMAKE_OSX_ARCHITECTURES
CMAKE_OSX_DEPLOYMENT_TARGET
CMAKE_OSX_ROOT
VTK_RENDERING_BACKEND
)
# Now cross-compile VTK with custom toolchains
set(ios_cmake_flags
-DBUILD_SHARED_LIBS:BOOL=OFF
-DBUILD_TESTING:BOOL=OFF
-DBUILD_EXAMPLES:BOOL=ON
-DVTK_RENDERING_BACKEND:STRING=OpenGL2
-DOPENGL_ES_VERSION:STRING=${OPENGL_ES_VERSION}
-DVTK_Group_Rendering:BOOL=OFF
-DVTK_Group_StandAlone:BOOL=OFF
-DVTK_Group_Imaging:BOOL=OFF
-DVTK_Group_MPI:BOOL=OFF
-DVTK_Group_Views:BOOL=OFF
-DVTK_Group_Qt:BOOL=OFF
-DVTK_Group_Tk:BOOL=OFF
-DVTK_Group_Web:BOOL=OFF
-DModule_vtkFiltersCore:BOOL=ON
-DModule_vtkFiltersModeling:BOOL=ON
-DModule_vtkFiltersSources:BOOL=ON
-DModule_vtkFiltersGeometry:BOOL=ON
-DModule_vtkIOGeometry:BOOL=ON
-DModule_vtkIOLegacy:BOOL=ON
-DModule_vtkIOImage:BOOL=ON
-DModule_vtkIOPLY:BOOL=ON
-DModule_vtkIOInfovis:BOOL=ON
-DModule_vtkImagingCore:BOOL=ON
-DModule_vtkInteractionStyle:BOOL=ON
-DModule_vtkParallelCore:BOOL=ON
-DModule_vtkRenderingCore:BOOL=ON
-DModule_vtkRenderingFreeType:BOOL=OFF
)
macro(crosscompile target toolchain_file archs)
ExternalProject_Add(
${target}
SOURCE_DIR ${CMAKE_SOURCE_DIR}
PREFIX ${PREFIX_DIR}/${target}
BINARY_DIR ${BUILD_DIR}/${target}
INSTALL_DIR ${INSTALL_DIR}/${target}
DEPENDS vtk-compile-tools
CMAKE_ARGS
-DCMAKE_INSTALL_PREFIX:PATH=${INSTALL_DIR}/${target}
-DCMAKE_CROSSCOMPILING:BOOL=ON
#-DCMAKE_OSX_ARCHITECTURES:STRING=${archs}
-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
-DCMAKE_TOOLCHAIN_FILE:FILEPATH=CMake/${toolchain_file}
-DVTKCompileTools_DIR:PATH=${BUILD_DIR}/vtk-compile-tools
${ios_cmake_flags}
)
endmacro()
crosscompile(vtk-ios-simulator
ios.simulator.toolchain.cmake
"${IOS_SIMULATOR_ARCHITECTURES}"
)
crosscompile(vtk-ios-device
ios.device.toolchain.cmake
"${IOS_DEVICE_ARCHITECTURES}"
)
# Pile it all into a framework
set(VTK_DEVICE_LIBS
"${INSTALL_DIR}/vtk-ios-device/lib/libvtk*.a")
set(VTK_SIMULATOR_LIBS
"${INSTALL_DIR}/vtk-ios-simulator/lib/libvtk*.a")
set(VTK_INSTALLED_HEADERS
"${INSTALL_DIR}/vtk-ios-device/include/vtk-${VTK_MAJOR_VERSION}.${VTK_MINOR_VERSION}")
configure_file(CMake/MakeFramework.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/CMake/MakeFramework.cmake
@ONLY)
add_custom_target(vtk-framework ALL
COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/CMake/MakeFramework.cmake
DEPENDS vtk-ios-device vtk-ios-simulator)
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