如何检查我的 gcc 版本？

Question

In file included from /usr/include/c++/4.8.2/locale:41:0,
                 from /usr/include/c++/4.8.2/iomanip:43,
                 from [...omitted by myself as it is irrelevant]
/usr/include/c++/4.8.2/bits/locale_facets_nonio.h:59:39: error: ‘locale’ has not been declared
     struct __timepunct_cache : public locale::facet

以上是我的构建日志中的第一个错误。

我没有尝试自己编译 glibc/gcc，我通过 yum 安装了它们。

我发现的一件可疑的事情是：

$ ll /usr/include/c++/
total 4
drwxr-xr-x. 12 root root 4096 Dec 17 14:16 4.8.2
lrwxrwxrwx   1 root root    5 Dec 17 14:16 4.8.5 -> 4.8.2
$

而 yum 只显示了 1 个版本的 gcc:

$ yum info gcc-c++
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.uhost.hk
 * epel: mirrors.hustunique.com
 * extras: centos.uhost.hk
 * updates: centos.uhost.hk
Installed Packages
Name        : gcc-c++
Arch        : x86_64
Version     : 4.8.5
Release     : 4.el7
Size        : 16 M
Repo        : installed
From repo   : base
Summary     : C++ support for GCC
URL         : http://gcc.gnu.org
License     : GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
Description : This package adds C++ support to the GNU Compiler Collection.
            : It includes support for most of the current C++ specification,
            : including templates and exception handling.

知道如何验证 /usr/include/c++/4.8.2 中的 headers 确实来自 4.8.5 包吗？

提前致谢。

P.S。我认为 glibc 可能无关紧要，但这是信息：

$ ldd --version
ldd (GNU libc) 2.17
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.

Answer 1

既然你在用Linux你可以试试

 ldd --version

Answer 2

我不太确定，但下面是更多信息

Whosebug: version of libc

$ /lib/x86_64-linux-gnu/libc.so.6 
GNU C Library (Ubuntu EGLIBC 2.19-0ubuntu6) stable release version 2.19, by Roland McGrath et al.
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.8.2.
Compiled on a Linux 3.13.9 system on 2014-04-12.
Available extensions:
    crypt add-on version 2.1 by Michael Glad and others
    GNU Libidn by Simon Josefsson
    Native POSIX Threads Library by Ulrich Drepper et al
    BIND-8.2.3-T5B
libc ABIs: UNIQUE IFUNC
For bug reporting instructions, please see:
<https://bugs.launchpad.net/ubuntu/+source/eglibc/+bugs>.
mandar@ubuntu:~/Desktop$

Answer 3

4.8.2 目录的符号链接不用担心，Red Hat Enterprise Linux（以及 CentOS）上的 libstdc++ headers 的排列方式是正常的那。

gcc --version 会告诉您路径中 gcc 可执行文件的版本。

rpm -q libstdc++-devel 将告诉您拥有 C++ 标准库 headers.

的包的版本

rpm -ql libstdc++-devel 将列出该软件包安装的文件，其中将包括 /usr/include/c++/4.8.2

下的文件

rpm --verify libstdc++-devel 将检查您是否没有通过用其他东西替换 C++ header 来搞乱它们。

错误更令人担忧，这意味着你搞砸了某些事情。我的猜测是它在 from [...omitted by myself as it is irrelevant] 部分，这实际上可能非常相关。 std::locale 应该在 <bits/locale_classes.h> 中声明，它包含在 <bits/locale_facets_nonio.h> 之前，所以如果没有声明，我猜你有一些 header 定义了 _LOCALE_CLASSES_H并阻止标准库 header 被读取。不要定义包含以下划线开头的守卫，它们是reserved names.

如何检查我的 gcc 版本？

How to Check the Version of my gcc?

c++

gcc

centos7

g++4.8