109 lines
3.6 KiB
CMake
109 lines
3.6 KiB
CMake
###############################################################################
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if (__nc_cxx)
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return ()
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endif ()
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set (__nc_cxx TRUE)
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###############################################################################
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# clear the default flags because they include optimisation flags we
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# explicitly do not want (ie, O3).
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set (CMAKE_CXX_FLAGS_RELEASE "")
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set (CMAKE_C_FLAGS_RELEASE "")
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set (CMAKE_CXX_FLAGS_DEBUG "")
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set (CMAKE_C_FLAGS_DEBUG "")
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###############################################################################
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include ("${CMAKE_CURRENT_LIST_DIR}/compile_flag.cmake")
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include ("${CMAKE_CURRENT_LIST_DIR}/link_flag.cmake")
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include ("${CMAKE_CURRENT_LIST_DIR}/test_restrict.cmake")
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###############################################################################
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append_compile_flag ("-fdiagnostics-color=auto")
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###############################################################################
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append_compile_flag ("-std=c++2b")
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append_compile_flag ("-fpermissive")
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append_compile_flag ("/std:c++latest")
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###############################################################################
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# STDLIB must be set after this block.
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if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
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set(STDLIB "libc++")
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append_compile_flag ("-stdlib=${STDLIB}")
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append_link_flag ("-fuse-ld=lld")
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elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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set(STDLIB "libstdc++")
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append_link_flag ("-fuse-ld=gold")
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else()
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message(FATAL_ERROR "Unknown CXX_COMPILER_ID: ${CMAKE_CXX_COMPILER_ID}")
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endif()
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###############################################################################
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# find the gcc or clang filesystem library and append to libs if needed
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#
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# note, we specifically _cannot_ use find_library because it just makes wild
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# hardcoded guess and doesn't respect _all_ the system paths; specifically
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# something like /usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libstdc++.so won't get
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# discovered.
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#if (NOT DEFINED __nc_cxx_stdcxxfs)
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# foreach(lib "" "c++fs" "c++experimental" "stdc++fs")
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# message (STATUS "Trying c++fs library '${lib}'")
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# try_compile(
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# __nc_cxx_stdcxxfs ${CMAKE_CURRENT_BINARY_DIR}
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# SOURCES
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# ${CMAKE_CURRENT_LIST_DIR}/nc_cxx_stdcxxfs.cpp
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# LINK_LIBRARIES
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# ${lib}
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# )
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#
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# if (__nc_cxx_stdcxxfs)
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# set (__nc_cxx_stdcxxfs "${lib}" CACHE INTERNAL "library required for c++ filesystem")
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# break ()
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# endif ()
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# endforeach()
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#
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# if (NOT DEFINED __nc_cxx_stdcxxfs)
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# message (FATAL_ERROR "Could not locate the required c++fs library")
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# endif ()
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#
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# message (STATUS "Using c++fs library ${__nc_cxx_stdcxxfs}")
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#endif ()
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set(NC_CXX_STDCXXFS ${__nc_cxx_stdcxxfs})
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###############################################################################
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test_restrict(RESTRICT_KEYWORD)
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add_definitions("-Drestrict=${RESTRICT_KEYWORD}")
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###############################################################################
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append_compile_flag("-pipe")
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append_compile_flag("-fno-deduce-init-list")
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append_compile_flag("-fvisibility=hidden")
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append_compile_flag("-fvisibility-inlines-hidden")
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append_compile_flag("-fPIC")
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# Clang doesn't enabled sized deallocation (__cpp_sized_deallocation) by
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# default, at least by clang-15, so we have to enable it explicitly.
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append_compile_flag("-fsized-deallocation")
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# We want a build-id so that we can attribute minidumps
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append_link_flag("-Wl,--build-id")
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# breakpad:XXX Our supported versions of breakpad crash when dumping symbols
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# from a DWARF5 binary. Just drop to DWARF4 for the moment.
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append_compile_flag("-gdwarf-4")
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append_compile_flag("-D__STDC_FORMAT_MACROS")
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add_definitions("-D_FILE_OFFSET_BITS=64")
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