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      1 function(llvm_create_cross_target_internal target_name toolchain buildtype)
      2 
      3   if(NOT DEFINED LLVM_${target_name}_BUILD)
      4     set(LLVM_${target_name}_BUILD "${CMAKE_BINARY_DIR}/${target_name}")
      5     set(LLVM_${target_name}_BUILD ${LLVM_${target_name}_BUILD} PARENT_SCOPE)
      6     message(STATUS "Setting native build dir to " ${LLVM_${target_name}_BUILD})
      7   endif(NOT DEFINED LLVM_${target_name}_BUILD)
      8 
      9   if (EXISTS ${LLVM_MAIN_SRC_DIR}/cmake/platforms/${toolchain}.cmake)
     10     set(CROSS_TOOLCHAIN_FLAGS_INIT
     11       -DCMAKE_TOOLCHAIN_FILE=\"${LLVM_MAIN_SRC_DIR}/cmake/platforms/${toolchain}.cmake\")
     12   else()
     13     set(CROSS_TOOLCHAIN_FLAGS_INIT
     14       -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
     15       -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
     16       )
     17   endif()
     18   set(CROSS_TOOLCHAIN_FLAGS_${target_name} ${CROSS_TOOLCHAIN_FLAGS_INIT}
     19     CACHE STRING "Toolchain configuration for ${target_name}")
     20 
     21   if (buildtype)
     22     set(build_type_flags "-DCMAKE_BUILD_TYPE=${buildtype}")
     23   endif()
     24   if (LLVM_USE_LINKER AND NOT CMAKE_CROSSCOMPILING)
     25     set(linker_flag "-DLLVM_USE_LINKER=${LLVM_USE_LINKER}")
     26   endif()
     27   if (LLVM_EXTERNAL_CLANG_SOURCE_DIR)
     28     # Propagate LLVM_EXTERNAL_CLANG_SOURCE_DIR so that clang-tblgen can be built
     29     set(external_clang_dir "-DLLVM_EXTERNAL_CLANG_SOURCE_DIR=${LLVM_EXTERNAL_CLANG_SOURCE_DIR}")
     30   endif()
     31 
     32   add_custom_command(OUTPUT ${LLVM_${target_name}_BUILD}
     33     COMMAND ${CMAKE_COMMAND} -E make_directory ${LLVM_${target_name}_BUILD}
     34     COMMENT "Creating ${LLVM_${target_name}_BUILD}...")
     35 
     36   add_custom_target(CREATE_LLVM_${target_name}
     37                     DEPENDS ${LLVM_${target_name}_BUILD})
     38 
     39   # Escape semicolons in the targets list so that cmake doesn't expand
     40   # them to spaces.
     41   string(REPLACE ";" "$<SEMICOLON>" targets_to_build_arg
     42          "${LLVM_TARGETS_TO_BUILD}")
     43   string(REPLACE ";" "$<SEMICOLON>" experimental_targets_to_build_arg
     44          "${LLVM_EXPERIMENTAL_TARGETS_TO_BUILD}")
     45 
     46   add_custom_command(OUTPUT ${LLVM_${target_name}_BUILD}/CMakeCache.txt
     47     COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
     48         -DCMAKE_MAKE_PROGRAM="${CMAKE_MAKE_PROGRAM}"
     49         ${CROSS_TOOLCHAIN_FLAGS_${target_name}} ${CMAKE_SOURCE_DIR}
     50         -DLLVM_TARGET_IS_CROSSCOMPILE_HOST=TRUE
     51         -DLLVM_TARGETS_TO_BUILD="${targets_to_build_arg}"
     52         -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="${experimental_targets_to_build_arg}"
     53         -DLLVM_DEFAULT_TARGET_TRIPLE="${TARGET_TRIPLE}"
     54         -DLLVM_TARGET_ARCH="${LLVM_TARGET_ARCH}"
     55         ${build_type_flags} ${linker_flag} ${external_clang_dir}
     56     WORKING_DIRECTORY ${LLVM_${target_name}_BUILD}
     57     DEPENDS CREATE_LLVM_${target_name}
     58     COMMENT "Configuring ${target_name} LLVM...")
     59 
     60   add_custom_target(CONFIGURE_LLVM_${target_name}
     61                     DEPENDS ${LLVM_${target_name}_BUILD}/CMakeCache.txt)
     62 
     63 endfunction()
     64 
     65 function(llvm_create_cross_target target_name sysroot)
     66   llvm_create_cross_target_internal(${target_name} ${sysroot} ${CMAKE_BUILD_TYPE})
     67 endfunction()
     68 
     69 llvm_create_cross_target_internal(NATIVE "" Release)
     70