我一直在尝试将<filesystem>
添加到我的项目中,但这似乎比我想象的更麻烦。<filesystem>
应该是C++17的一部分,我需要将该定义添加到我的CMakeList中。
我的根CMakeLists如下所示:
MESSAGE(“In src CMAKELIST”)
#
# Build everything in include/ directory
add_subdirectory(include)
#
#set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
#set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
## Main executable target
add_executable(cmakeDemo main.cpp)
# These libraries get built in include/*/, CMake will auto-set required
# compiler flags and include paths from their definitions
target_link_libraries(cmakeDemo record ${portaudio})
target_link_libraries(cmakeDemo database)
target_link_libraries(cmakeDemo match)
target_link_libraries(cmakeDemo spectogram)
我添加了C++17的定义,但当编译我的系统时,出现以下错误:
make
“InsrcCMAKELIST”
“InincludeCMAKELIST”
“IndatabaseCMAKELIST”
“InmatchCMAKELIST”
“InrecordCMAKELIST”
“InspectogramCMAKELIST”
/home/lamda/soundcloud/src/include/spectogram/base/base.h
“outspectogramCMAKELIST”
-- Configuring done
CMake Error in src/CMakeLists.txt:
Target "cmakeDemo" requires the language dialect "CXX17" (with compiler
extensions), but CMake does not know the compile flags to use to enable it.
-- Generating done
-- Build files have been written to: /home/lamda/soundcloud/build
make: *** [cmake_check_build_system] Error 1
但是为什么不愿意使用C++17,以便我可以使用filesystem
库呢?为什么?