Thanks very much for the response!
Yes, the libstdc++.so.6.0.22 is not installed by rpm, when upgrade the gcc from 4.8.5 to 6.2.0, I use `make, make install` to upgrade the new version.
Whether there is way to install gcc > 4.9 for Centos 7.5?
The `rpm -q libstdc++` output is:
# rpm -q libstdc++
libstdc++-4.8.5-28.el7_5.1.x86_64
Thanks
Darcy
-----Original Message-----
From: Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx>
Sent: Wednesday, October 10, 2018 7:43 PM
To: Ling, Darcy (NSB - CN/Qingdao) <darcy.ling@xxxxxxxxxxxxxxx>
Cc: gcc-help@xxxxxxxxxxx
Subject: Re: I have installed the GLIBCXX_3.4.21 but it always reports libstdc++.so.6(GLIBCXX_3.4.21)(64bit) is needed during the RPM install
On 2018-10-10 02:34 +0000, Ling, Darcy (NSB - CN/Qingdao) wrote:
> 1. When I install a RPM package, it always reports
> "libstdc++.so.6(GLIBCXX_3.4.21)(64bit) is needed by".
> # rpm -ivh cnet-c-0.1.0-18.9.x86_64.rpm
> error: Failed dependencies:
> libstdc++.so.6(GLIBCXX_3.4.21)(64bit) is needed by cnet-c-
> 0.1.0-18.9.x86_64
>
> 2. Based on the search, I use following commands to check the
> dynamic libstdc++.so installation.
> The version to GLIBCXX_3.4.22 has been installed and the
> libstdc++.so.6 points to libstdc++.so.6.0.22.
> /usr/lib64/libstdc++.so.6 -> libstdc++.so.6.0.22
>
> Any suggestions how I should do to solve the dependency issue? And
> whether I need to downgrade the GLIBCXX_3.4.22 to GLIBCXX_3.4.21?
I don't think so. libstdc++.so.6.0.22 provides symbols with version GLIBCXX_3.4.21. The GLIBCXX_*.*.* stuff ("versioned symbol") is mean to solve this "dependency hell" problem.
I'm not familiar with rpm. But I can guess that libstdc++.so.6.0.22 is not installed by rpm and an old libstdc++.so version is still registered in the rpm database.
What would `rpm -q libstdc++` output?
--
Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University
