c++ - [LLVM-9 clang-9 OSX]：std::filesystem::path 无法识别

Question

您好，在 OSX Mojave 上升级到 LLVM-9 版本后，使用brew upgrade llvm

我收到以下错误：

In file included from /Users/roman/CLionProjects/Milerius/antara-gaming-sfml-template/cmake-build-debug/_deps/antara-gaming-sdk-src/modules/core/antara/gaming/core/real.path.cpp:17:
/Users/roman/CLionProjects/Milerius/antara-gaming-sfml-template/cmake-build-debug/_deps/antara-gaming-sdk-src/modules/core/antara/gaming/core/real.path.hpp:23:22: fatal error: 'path' is unavailable: introduced in macOS 10.15
    std::filesystem::path binary_real_path() noexcept;
                     ^
/usr/local/opt/llvm/bin/../include/c++/v1/filesystem:738:24: note: 'path' has been explicitly marked unavailable here

我的代码：

#include <filesystem>

namespace antara::gaming::core
{
    std::filesystem::path binary_real_path() noexcept;
    std::filesystem::path assets_real_path() noexcept;
}

这是正常的吗？

Answer 1

解决方案之一是使用：-mmacosx-version-min=10.15编译器标志

在 CMake 中：

add_library(antara_cross_filesystem INTERFACE)
add_library(antara::cross_filesystem ALIAS antara_cross_filesystem)

target_link_libraries(antara_cross_filesystem INTERFACE
        $<$<AND:$<PLATFORM_ID:Linux>,$<VERSION_LESS:$<CXX_COMPILER_VERSION>,9.0>>:stdc++fs>
        $<$<AND:$<PLATFORM_ID:Darwin>,$<VERSION_LESS:$<CXX_COMPILER_VERSION>,9.0>>:c++fs>)
target_compile_options(antara_cross_filesystem INTERFACE
        $<$<AND:$<PLATFORM_ID:Darwin>,$<VERSION_GREATER:$<CXX_COMPILER_VERSION>,8.0>>:-mmacosx-version-min=10.15>)