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range-v3-0.12.0/cmake/ranges_flags.cmake  view on Meta::CPAN

  # Clang can generate debug info tuned for LLDB or GDB
  if (RANGES_CXX_COMPILER_CLANG)
    if (RANGES_ENV_MACOSX)
      ranges_append_flag(RANGES_HAS_GLLDB -glldb)
    elseif(RANGES_ENV_LINUX OR RANGES_ENV_OPENBSD)
      ranges_append_flag(RANGES_HAS_GGDB -ggdb)
    endif()
  endif()
endif()

if (RANGES_RELEASE_BUILD)
  if (NOT RANGES_ASSERTIONS)
    ranges_append_flag(RANGES_HAS_DNDEBUG -DNDEBUG)
  endif()
  if (NOT RANGES_ASAN AND NOT RANGES_MSAN)
    # The quality of ASan and MSan error messages suffers if we disable the
    # frame pointer, so leave it enabled when compiling with either of them:
    ranges_append_flag(RANGES_HAS_OMIT_FRAME_POINTER -fomit-frame-pointer)
  endif()

  ranges_append_flag(RANGES_HAS_OFAST -Ofast)
  if (NOT RANGES_HAS_OFAST)
    ranges_append_flag(RANGES_HAS_O2 -O2)
  endif()
  ranges_append_flag(RANGES_HAS_STRICT_ALIASING -fstrict-aliasing)
  ranges_append_flag(RANGES_HAS_STRICT_VTABLE_POINTERS -fstrict-vtable-pointers)
  ranges_append_flag(RANGES_HAS_FAST_MATH -ffast-math)
  ranges_append_flag(RANGES_HAS_VECTORIZE -fvectorize)

  if (NOT RANGES_ENV_MACOSX)
    # Sized deallocation is not available in MacOSX:
    ranges_append_flag(RANGES_HAS_SIZED_DEALLOCATION -fsized-deallocation)
  endif()

  if (RANGES_LLVM_POLLY)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mllvm -polly -mllvm -polly-vectorizer=stripmine")
  endif()

  if (RANGES_CXX_COMPILER_CLANG AND (NOT (RANGES_INLINE_THRESHOLD EQUAL -1)))
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mllvm -inline-threshold=${RANGES_INLINE_THRESHOLD}")
  endif()
endif()

if (RANGES_NATIVE)
  ranges_append_flag(RANGES_HAS_MARCH_NATIVE "-march=native")
  ranges_append_flag(RANGES_HAS_MTUNE_NATIVE "-mtune=native")
endif()

include(CheckCXXSourceCompiles)

set(CMAKE_REQUIRED_FLAGS ${RANGES_STD_FLAG})
# Probe for library and compiler support for aligned new
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/cmake/aligned_new_probe.cpp" RANGE_V3_PROBE_CODE)
check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGE_V3_ALIGNED_NEW_PROBE)
unset(RANGE_V3_PROBE_CODE)
unset(CMAKE_REQUIRED_FLAGS)
if (NOT RANGE_V3_ALIGNED_NEW_PROBE)
  add_compile_options("-DRANGES_CXX_ALIGNED_NEW=0")
endif()

# Probe for coroutine TS support
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/cmake/coro_test_code.cpp" RANGE_V3_PROBE_CODE)
if(RANGES_CXX_COMPILER_MSVC)
  set(CMAKE_REQUIRED_FLAGS "/await")
  check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGES_HAS_AWAIT)
  if(RANGES_HAS_AWAIT)
    set(RANGE_V3_COROUTINE_FLAGS "/await")
  endif()
elseif(RANGES_CXX_COMPILER_CLANG)
  set(CMAKE_REQUIRED_FLAGS "-fcoroutines-ts ${RANGES_STD_FLAG}")
  check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGES_HAS_FCOROUTINES_TS)
  if(RANGES_HAS_FCOROUTINES_TS)
    set(RANGE_V3_COROUTINE_FLAGS "-fcoroutines-ts")
  endif()
endif()
unset(CMAKE_REQUIRED_FLAGS)
unset(RANGE_V3_PROBE_CODE)
if (RANGE_V3_COROUTINE_FLAGS)
  add_compile_options(${RANGE_V3_COROUTINE_FLAGS})
endif()

# Test for concepts support
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/cmake/concepts_test_code.cpp" RANGE_V3_PROBE_CODE)
if(RANGES_CXX_COMPILER_GCC OR RANGES_CXX_COMPILER_CLANG)
  set(CMAKE_REQUIRED_FLAGS "-fconcepts ${RANGES_STD_FLAG}")
  check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGE_V3_HAS_FCONCEPTS)
  if(RANGE_V3_HAS_FCONCEPTS)
    set(RANGE_V3_CONCEPTS_FLAGS "-fconcepts")
  endif()
endif()
unset(CMAKE_REQUIRED_FLAGS)
unset(RANGE_V3_PROBE_CODE)
if (RANGE_V3_CONCEPTS_FLAGS AND RANGES_PREFER_REAL_CONCEPTS)
  add_compile_options(${RANGE_V3_CONCEPTS_FLAGS})
endif()

if (RANGES_VERBOSE_BUILD)
  get_directory_property(RANGES_COMPILE_OPTIONS COMPILE_OPTIONS)
  message(STATUS "[range-v3]: C++ flags: ${CMAKE_CXX_FLAGS}")
  message(STATUS "[range-v3]: C++ debug flags: ${CMAKE_CXX_FLAGS_DEBUG}")
  message(STATUS "[range-v3]: C++ Release Flags: ${CMAKE_CXX_FLAGS_RELEASE}")
  message(STATUS "[range-v3]: C++ Compile Flags: ${CMAKE_CXX_COMPILE_FLAGS}")
  message(STATUS "[range-v3]: Compile options: ${RANGES_COMPILE_OPTIONS}")
  message(STATUS "[range-v3]: C Flags: ${CMAKE_C_FLAGS}")
  message(STATUS "[range-v3]: C Compile Flags: ${CMAKE_C_COMPILE_FLAGS}")
  message(STATUS "[range-v3]: EXE Linker flags: ${CMAKE_EXE_LINKER_FLAGS}")
  message(STATUS "[range-v3]: C++ Linker flags: ${CMAKE_CXX_LINK_FLAGS}")
  message(STATUS "[range-v3]: MODULE Linker flags: ${CMAKE_MODULE_LINKER_FLAGS}")
  get_directory_property(CMakeCompDirDefs COMPILE_DEFINITIONS)
  message(STATUS "[range-v3]: Compile Definitions: ${CmakeCompDirDefs}")
endif()