[Bug c++/91876] Segmentation fault when comparing std::system_error::code() and std::errc::invalid_argument

[lachiepoop at naver dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91876

--- Comment #2 from Young <lachiepoop at naver dot com> ---
(In reply to Jonathan Wakely from comment #1)
> The gdb backtrace shows your program is linked to the wrong libstdc++.so
> that comes from the gcc-4.4.7 system compiler, not the one from gcc-7.2.1
> that you compiled with.
> 
> See
> https://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.how_to_set_paths
> and
> https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dynamic_or_shared.
> html#manual.intro.using.linkage.dynamic

Thanks for your comment. 
Following is an update of me trying to match libstdc++ and gcc version, which
ended up in smoke.

My executable(a.out) seems to linked against /usr/lib64/libstdc++.so.6. Take a
look at gdb log:

  #0  0x0000003603269ca2 in std::error_category::equivalent(std::error_code
const&, int) const () from /usr/lib64/libstdc++.so.6

And I have double checked as well:

  $ ldd a.out
        linux-vdso.so.1 =>  (0x00007ffe32ff3000)
        libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x0000003603200000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00000035fee00000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003600e00000)
        libc.so.6 => /lib64/libc.so.6 (0x00000035fea00000)
        /lib64/ld-linux-x86-64.so.2 (0x00000035fe200000)
        libm.so.6 => /lib64/libm.so.6 (0x00000035ffa00000)

My libstdc++ (surprisingly) appears to be of gcc 4:

  $ ls -l /usr/lib64/libstdc++.so.6
  lrwxrwxrwx. 1 root root 19 Feb 21  2017 /usr/lib64/libstdc++.so.6 ->
libstdc++.so.6.0.13

According to this
page(https://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html#abi.versioning.history),
libstdc++.so.6.0.13 is of gcc 4.4.2, as Jonathan pointed out.

I am on CentOS 6 and devtoolset-7. The devtoolset-7 actually provides
libstdc++.so:

  $ ls -l
/opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7/libstdc++.so
  -rw-r--r-- 1 root root 210 Oct 25  2017
/opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7/libstdc++.so
  $ cat
/opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7/libstdc++.so
  /* GNU ld script
     Use the shared library, but some functions are only in
     the static library, so try that secondarily.  */
  OUTPUT_FORMAT(elf64-x86-64)
  INPUT ( /usr/lib64/libstdc++.so.6 -lstdc++_nonshared )

And it is pointing back to /usr/lib64/libstdc++.so.6.0.13.

For the moment, I can not lay my hands on libstdc++.so.6.0.24, which, according
to the above page, is paired with gcc7.

Thank you.