| include(LLVMParseArguments) |
| |
| # Compile a source into an object file with COMPILER_RT_TEST_COMPILER using |
| # a provided compile flags and dependenices. |
| # clang_compile(<object> <source> |
| # CFLAGS <list of compile flags> |
| # DEPS <list of dependencies>) |
| macro(clang_compile object_file source) |
| parse_arguments(SOURCE "CFLAGS;DEPS" "" ${ARGN}) |
| get_filename_component(source_rpath ${source} REALPATH) |
| if(NOT COMPILER_RT_STANDALONE_BUILD) |
| list(APPEND SOURCE_DEPS clang) |
| endif() |
| if (TARGET CompilerRTUnitTestCheckCxx) |
| list(APPEND SOURCE_DEPS CompilerRTUnitTestCheckCxx) |
| endif() |
| string(REGEX MATCH "[.](cc|cpp)$" is_cxx ${source_rpath}) |
| if(is_cxx) |
| string(REPLACE " " ";" global_flags "${CMAKE_CXX_FLAGS}") |
| else() |
| string(REPLACE " " ";" global_flags "${CMAKE_C_FLAGS}") |
| endif() |
| # On Windows, CMAKE_*_FLAGS are built for MSVC but we use the GCC clang.exe |
| # which doesn't support flags starting with "/smth". Replace those with |
| # "-smth" equivalents. |
| if(MSVC) |
| string(REGEX REPLACE "^/" "-" global_flags "${global_flags}") |
| string(REPLACE ";/" ";-" global_flags "${global_flags}") |
| endif() |
| # Ignore unknown warnings. CMAKE_CXX_FLAGS may contain GCC-specific options |
| # which are not supported by Clang. |
| list(APPEND global_flags -Wno-unknown-warning-option) |
| set(compile_flags ${global_flags} ${SOURCE_CFLAGS}) |
| add_custom_command( |
| OUTPUT ${object_file} |
| COMMAND ${COMPILER_RT_TEST_COMPILER} ${compile_flags} -c |
| -o "${object_file}" |
| ${source_rpath} |
| MAIN_DEPENDENCY ${source} |
| DEPENDS ${SOURCE_DEPS}) |
| endmacro() |
| |
| # On Darwin, there are no system-wide C++ headers and the just-built clang is |
| # therefore not able to compile C++ files unless they are copied/symlinked into |
| # ${LLVM_BINARY_DIR}/include/c++ |
| # The just-built clang is used to build compiler-rt unit tests. Let's detect |
| # this before we try to build the tests and print out a suggestion how to fix |
| # it. |
| # On other platforms, this is currently not an issue. |
| macro(clang_compiler_add_cxx_check) |
| if (APPLE) |
| set(CMD |
| "echo '#include <iostream>' | ${COMPILER_RT_TEST_COMPILER} -E -x c++ - > /dev/null" |
| "if [ $? != 0 ] " |
| " then echo" |
| " echo 'Your just-built clang cannot find C++ headers, which are needed to build and run compiler-rt tests.'" |
| " echo 'You should copy or symlink your system C++ headers into ${LLVM_BINARY_DIR}/include/c++'" |
| " if [ -d $(dirname $(dirname $(xcrun -f clang)))/include/c++ ]" |
| " then echo 'e.g. with:'" |
| " echo ' cp -r' $(dirname $(dirname $(xcrun -f clang)))/include/c++ '${LLVM_BINARY_DIR}/include/'" |
| " elif [ -d $(dirname $(dirname $(xcrun -f clang)))/lib/c++ ]" |
| " then echo 'e.g. with:'" |
| " echo ' cp -r' $(dirname $(dirname $(xcrun -f clang)))/lib/c++ '${LLVM_BINARY_DIR}/include/'" |
| " fi" |
| " echo 'This can also be fixed by checking out the libcxx project from llvm.org and installing the headers'" |
| " echo 'into your build directory:'" |
| " echo ' cd ${LLVM_SOURCE_DIR}/projects && svn co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx'" |
| " echo ' cd ${LLVM_BINARY_DIR} && make -C ${LLVM_SOURCE_DIR}/projects/libcxx installheaders HEADER_DIR=${LLVM_BINARY_DIR}/include'" |
| " echo" |
| " false" |
| "fi" |
| ) |
| add_custom_target(CompilerRTUnitTestCheckCxx |
| COMMAND bash -c "${CMD}" |
| COMMENT "Checking that just-built clang can find C++ headers..." |
| VERBATIM) |
| if (TARGET clang) |
| ADD_DEPENDENCIES(CompilerRTUnitTestCheckCxx clang) |
| endif() |
| endif() |
| endmacro() |