Centos7.7.1904上安装qt5.15.2问题汇总

Centos7.7.1904上安装qt5.15.2问题汇总

先说结果：没有在Centos7.7上安装成功，原因和问题会在下面一一说明。

1、安装步骤请查考文档或下面的博客

https://blog.youkuaiyun.com/ZHONGCAI0901/article/details/118552770

2、我遇到的问题

2.1、在执行.run文件下一步、下一步时候，“Installing Qt”这一步出现了

libstdc++.so.6 ‘GLIBCXX_3.4.21’ not found这个问题；

我的解决方式：升级gcc，升级步骤参考下面博客。

https://www.cnblogs.com/w84422/p/15210919.html

该博客适用于多个版本的gcc升级，我自己尝试升级成功过：5.4.0和9.1.0两个版本

2.2、解决完第一个问题后，可以正常的finished，但是不要高兴太早，真正的坑在这个问题；

qtcreator打不开？？？？？

找原因：

[root@localhost ~]# cd /opt/Qt/Tools/QtCreator/bin/
[root@localhost bin]# ldd qtcreator | grep "not found"
./qtcreator: /lib64/libz.so.1: version `ZLIB_1.2.9' not found (required by /opt/Qt/Tools/QtCreator/bin/./../lib/Qt/lib/libQt6Gui.so.6)
./qtcreator: /lib64/libm.so.6: version `GLIBC_2.27' not found (required by /opt/Qt/Tools/QtCreator/bin/./../lib/Qt/lib/libQt6Gui.so.6)
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found
	libQt6Core.so.6 => not found

libQt6Core.so.6 not found???

找原因：

[root@localhost lib]# pwd
/opt/Qt/Tools/QtCreator/lib/Qt/lib
[root@localhost lib]# ldd libQt6Core.so.6 | grep "not found"
./libQt6Core.so.6: /lib64/libc.so.6: version `GLIBC_2.25' not found (required by ./libQt6Core.so.6)
./libQt6Core.so.6: /lib64/libc.so.6: version `GLIBC_2.28' not found (required by ./libQt6Core.so.6)

有人会问Qt6Core.so.6没有找到是不是链接的问题，我使用LD_PRELOAD和LD_LIBRARY_PATH都试过了没有用的，主要原因是GLIBC版本不对吧。

GLIBC_2.25/28 not found ???

[root@localhost lib]# strings /lib64/libc.so.6 | grep GLIBC
GLIBC_2.2.5
GLIBC_2.2.6
GLIBC_2.3
GLIBC_2.3.2
GLIBC_2.3.3
GLIBC_2.3.4
GLIBC_2.4
GLIBC_2.5
GLIBC_2.6
GLIBC_2.7
GLIBC_2.8
GLIBC_2.9
GLIBC_2.10
GLIBC_2.11
GLIBC_2.12
GLIBC_2.13
GLIBC_2.14
GLIBC_2.15
GLIBC_2.16
GLIBC_2.17

确实没有25/28，那就升级吧，坑啊，这个不能升级，参考下面两个博客的惨痛教训，我升级了，我又回退了，不然会coredump。最好保持和内核编译的GLIBC版本一致吧。

https://blog.youkuaiyun.com/myhes/article/details/106923039

https://blog.51cto.com/berniem2m/2369131

那怎么办呢？我选择了Ubuntu。

原文链接：https://blog.youkuaiyun.com/youzai2017/article/details/121824035