linux 下eclipse cdt 编译报 error: '_GLIBCXX17_DEPRECATED' does not name a type; did you mean '_GLIBCXX_DEPRECATED'?

详细报错信息:

/usr/include/c++/8/exception:101:3: error: '_GLIBCXX17_DEPRECATED' does not name a type; did you mean '_GLIBCXX_DEPRECATED'?
   _GLIBCXX17_DEPRECATED
   ^~~~~~~~~~~~~~~~~~~~~
   _GLIBCXX_DEPRECATED
In file included from /usr/include/c++/8/bits/move.h:55:0,
                 from /usr/include/c++/8/bits/nested_exception.h:40,
                 from /usr/include/c++/8/exception:144,
                 from /usr/include/c++/8/ios:39,
                 from /usr/include/c++/8/ostream:38,
                 from /usr/include/c++/8/iostream:39,
                 from ../main.cpp:7:
/usr/include/c++/8/type_traits:921:32: error: there are no arguments to '__is_constructible' that depend on a template parameter, so a declaration of '__is_constructible' must be available [-fpermissive]

经排查,报这个错的原因主要是eclipse include指定gcc目录和本机当前g++版本不匹配。

查看当前g++版本直接: gcc/g++ -v

查看Eclipse 指定include 目录: Window -> Preferences -> C/C++ -> Build -> Environment -> CPLUS_INCLUDE_PATH 项指定值

两种解决办法

首先查看当前系统装了那些g++，以debian/ubuntu为例:

ls /usr/bin/x86_64-linux-gnu-g++*

比如我装已装的g++:

/usr/bin/x86_64-linux-gnu-g++       /usr/bin/x86_64-linux-gnu-g++-7
/usr/bin/x86_64-linux-gnu-g++-4.8  /usr/bin/x86_64-linux-gnu-g++-8
/usr/bin/x86_64-linux-gnu-g++-5

1. 修改eclipse 指定include文件夹，和当前g++版本对应

查看当前g++版本，例如我当前的g++版本是7.4.0：

root@ming:~# g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 7.4.0-6' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 7.4.0 (Debian 7.4.0-6) 
root@ming:~# 

打开: Window -> Preferences -> C/C++ -> Build -> Environment，选中CPLUS_INCLUDE_PATH项目，点击Edit,把值改成:/usr/include/c++/　（当前g++版本）　/,例如我的就需要改成:/usr/include/c++/7/

2. 修改当前g++版本

例如eclipse 指定的g++ include 目录为: /usr/include/c++/8/,而我当前g++版本是 7.4.0

查看当前gcc软连接到哪,以debian(ubuntu)为例:

ls -l /usr/bin/g++
lrwxrwxrwx 1 root root 31 5月  29 08:42 /usr/bin/g++ -> /usr/bin/x86_64-linux-gnu-g++-7

x86_64-linux-gnu-g++-7 : 表示gcc 7

查看是否有g++-8,apt-get install g++-8

ls /usr/bin/x86_64-linux-gnu-g++-8

如果已安装g++8应该会有x86_64-linux-gnu-g++-8

删除当前g++软连接，重新连接g++到8:

rm /usr/bin/g++
ln -s /usr/bin/x86_64-linux-gnu-g++-8 /usr/bin/g++

尽量让gcc和g++版本保持一致，如果g++改为了8,那gcc尽量也改成8

查看是否有gcc-8, 如果没有debian(ubuntu): apt-get install gcc-8

ls /usr/bin/x86_64-linux-gnu-gcc-8

删除当前g++软连接，重新连接g++到8:

rm /usr/bin/gcc
ln -s /usr/bin/x86_64-linux-gnu-gcc-8 /usr/bin/gcc

到此可以重新编译一下了，祝一切顺利~