因此,我一直想将<filesystem>
纳入我的项目,这似乎是一个比我想象的更大的问题。 <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看起来像这样:
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)
在其中添加了c ++ 17定义,但是在编译系统时出现此错误:
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
但是不知道为什么不愿意使用c ++ 17,所以我可以使用该filesystem
库?为什么?